Drop support of kernels prior to 3.2 (Debian 7, Ubuntu 12.04)

13 files changed, 1724 insertions, 2215 deletions

diff --git a/driver/base.c b/driver/base.c
index dfd82c6..220f1f3 100644
--- a/driver/base.c
+++ b/driver/base.c
@@ -5,144 +5,9 @@
  * @date 2009-04-05
  * @brief Contains the main code which connects all the different parts and does
  * basic driver tasks like initialization.
- *
- * This is a full rewrite of the pciDriver.
- * New default is to support kernel 2.6, using kernel 2.6 APIs.
- *
  */
 
-/*
- * Change History:
- *
- * $Log: not supported by cvs2svn $
- * Revision 1.13  2008-05-30 11:38:15  marcus
- * Added patches for kernel 2.6.24
- *
- * Revision 1.12  2008-01-24 14:21:36  marcus
- * Added a CLEAR_INTERRUPT_QUEUE ioctl.
- * Added a sysfs attribute to show the outstanding IRQ queues.
- *
- * Revision 1.11  2008-01-24 12:53:11  marcus
- * Corrected wait_event condition in waiti_ioctl. Improved the loop too.
- *
- * Revision 1.10  2008-01-14 10:39:39  marcus
- * Set some messages as debug instead of normal.
- *
- * Revision 1.9  2008-01-11 10:18:28  marcus
- * Modified interrupt mechanism. Added atomic functions and queues, to address race conditions. Removed unused interrupt code.
- *
- * Revision 1.8  2007-07-17 13:15:55  marcus
- * Removed Tasklets.
- * Using newest map for the ABB interrupts.
- *
- * Revision 1.7  2007-07-06 15:56:04  marcus
- * Change default status for OLD_REGISTERS to not defined.
- *
- * Revision 1.6  2007-07-05 15:29:59  marcus
- * Corrected issue with the bar mapping for interrupt handling.
- * Added support up to kernel 2.6.20
- *
- * Revision 1.5  2007-05-29 07:50:18  marcus
- * Split code into 2 files. May get merged in the future again....
- *
- * Revision 1.4  2007/03/01 17:47:34  marcus
- * Fixed bug when the kernel memory was less than one page, it was not locked properly, recalling an old mapping issue in this case.
- *
- * Revision 1.3  2007/03/01 17:01:22  marcus
- * comment fix (again).
- *
- * Revision 1.2  2007/03/01 17:00:25  marcus
- * Changed some comment in the log.
- *
- * Revision 1.1  2007/03/01 16:57:43  marcus
- * Divided driver file to ease the interrupt hooks for the user of the driver.
- * Modified Makefile accordingly.
- *
- * From pciDriver.c:
- * Revision 1.11  2006/12/11 16:15:43  marcus
- * Fixed kernel buffer mmapping, and driver crash when application crashes.
- * Buffer memory is now marked reserved during allocation, and mmaped with
- * remap_xx_range.
- *
- * Revision 1.10  2006/11/21 09:50:49  marcus
- * Added PROGRAPE4 vendor/device IDs.
- *
- * Revision 1.9  2006/11/17 18:47:36  marcus
- * Removed MERGE_SGENTRIES flag, now it is selected at runtime with 'type'.
- * Removed noncached in non-prefetchable areas, to allow the use of MTRRs.
- *
- * Revision 1.8  2006/11/17 16:41:21  marcus
- * Added slot number to the PCI info IOctl.
- *
- * Revision 1.7  2006/11/13 12:30:34  marcus
- * Added a IOctl call, to confiure the interrupt response. (testing pending).
- * Basic interrupts are now supported, using a Tasklet and Completions.
- *
- * Revision 1.6  2006/11/08 21:30:02  marcus
- * Added changes after compile tests in kernel 2.6.16
- *
- * Revision 1.5  2006/10/31 07:57:38  marcus
- * Improved the pfn calculation in nopage(), to deal with some possible border
- * conditions. It was really no issue, because they are normally page-aligned
- * anyway, but to be on the safe side.
- *
- * Revision 1.4  2006/10/30 19:37:40  marcus
- * Solved bug on kernel memory not mapping properly.
- *
- * Revision 1.3  2006/10/18 11:19:20  marcus
- * Added kernel 2.6.8 support based on comments from Joern Adamczewski (GSI).
- *
- * Revision 1.2  2006/10/18 11:04:15  marcus
- * Bus Master is only activated when we detect a specific board.
- *
- * Revision 1.1  2006/10/10 14:46:51  marcus
- * Initial commit of the new pciDriver for kernel 2.6
- *
- * Revision 1.9  2006/10/05 11:30:46  marcus
- * Prerelease. Added bus and devfn to pciInfo for compatibility.
- *
- * Revision 1.8  2006/09/25 16:51:07  marcus
- * Added PCI config IOctls, and implemented basic mmap functions.
- *
- * Revision 1.7  2006/09/20 11:12:41  marcus
- * Added Merge SG entries
- *
- * Revision 1.6  2006/09/19 17:22:18  marcus
- * backup commit.
- *
- * Revision 1.5  2006/09/18 17:13:11  marcus
- * backup commit.
- *
- * Revision 1.4  2006/09/15 15:44:41  marcus
- * backup commit.
- *
- * Revision 1.3  2006/08/15 11:40:02  marcus
- * backup commit.
- *
- * Revision 1.2  2006/08/12 18:28:42  marcus
- * Sync with the laptop
- *
- * Revision 1.1  2006/08/11 15:30:46  marcus
- * Sync with the laptop
- *
- */
-
-#include <linux/version.h>
 
-/* Check macros and kernel version first */
-#ifndef KERNEL_VERSION
-#error "No KERNEL_VERSION macro! Stopping."
-#endif
-
-#ifndef LINUX_VERSION_CODE
-#error "No LINUX_VERSION_CODE macro! Stopping."
-#endif
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,8)
-#error "This driver has been tested only for Kernel 2.6.8 or above."
-#endif
-
-/* Required includes */
 #include <linux/string.h>
 #include <linux/slab.h>
 #include <linux/types.h>
@@ -166,32 +31,15 @@
 
 #include "../pcilib/version.h"
 
-/* Configuration for the driver (what should be compiled in, module name, etc...) */
 #include "config.h"
-
-/* Compatibility functions/definitions (provides functions which are not available on older kernels) */
 #include "compat.h"
-
-/* External interface for the driver */
 #include "pciDriver.h"
-
-/* Internal definitions for all parts (prototypes, data, macros) */
 #include "common.h"
-
-/* Internal definitions for the base part */
 #include "base.h"
-
-/* Internal definitions of the IRQ handling part */
 #include "int.h"
-
-/* Internal definitions for kernel memory */
 #include "kmem.h"
-
-/* Internal definitions for user space memory */
 #include "umem.h"
-
 #include "ioctl.h"
-
 #include "build.h"
 
 /*************************************************************************/
@@ -221,54 +69,54 @@ pcidriver_privdata_t *pcidriver_dummydata = NULL;
  */
 static int __init pcidriver_init(void)
 {
-	int err = 0;
-
-	/* Initialize the device count */
-	atomic_set(&pcidriver_deviceCount, 0);
-	
-	memset(pcidriver_privdata, 0, sizeof(pcidriver_privdata));
-
-	/* Allocate character device region dynamically */
-	if ((err = alloc_chrdev_region(&pcidriver_devt, MINORNR, MAXDEVICES, NODENAME)) != 0) {
-		mod_info("Couldn't allocate chrdev region. Module not loaded.\n");
-		goto init_alloc_fail;
-	}
-	mod_info("Major %d allocated to nodename '%s'\n", MAJOR(pcidriver_devt), NODENAME);
-
-	/* Register driver class */
-	pcidriver_class = class_create(THIS_MODULE, NODENAME);
-
-	if (IS_ERR(pcidriver_class)) {
-		mod_info("No sysfs support. Module not loaded.\n");
-		goto init_class_fail;
-	}
-
-	/* Register PCI driver. This function returns the number of devices on some
-	 * systems, therefore check for errors as < 0. */
+    int err = 0;
+
+    /* Initialize the device count */
+    atomic_set(&pcidriver_deviceCount, 0);
+
+    memset(pcidriver_privdata, 0, sizeof(pcidriver_privdata));
+
+    /* Allocate character device region dynamically */
+    if ((err = alloc_chrdev_region(&pcidriver_devt, MINORNR, MAXDEVICES, NODENAME)) != 0) {
+        mod_info("Couldn't allocate chrdev region. Module not loaded.\n");
+        goto init_alloc_fail;
+    }
+    mod_info("Major %d allocated to nodename '%s'\n", MAJOR(pcidriver_devt), NODENAME);
+
+    /* Register driver class */
+    pcidriver_class = class_create(THIS_MODULE, NODENAME);
+
+    if (IS_ERR(pcidriver_class)) {
+        mod_info("No sysfs support. Module not loaded.\n");
+        goto init_class_fail;
+    }
+
+    /* Register PCI driver. This function returns the number of devices on some
+     * systems, therefore check for errors as < 0. */
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	if ((err = pcidriver_probe(NULL, NULL)) < 0) {
+    if ((err = pcidriver_probe(NULL, NULL)) < 0) {
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	if ((err = pci_register_driver(&pcidriver_driver)) < 0) {
+    if ((err = pci_register_driver(&pcidriver_driver)) < 0) {
 #endif /* PCIDRIVER_DUMMY_DEVICE */
-		mod_info("Couldn't register PCI driver. Module not loaded.\n");
-		goto init_pcireg_fail;
-	}
+        mod_info("Couldn't register PCI driver. Module not loaded.\n");
+        goto init_pcireg_fail;
+    }
 
-	mod_info("pcidriver %u.%u.%u loaded\n", PCILIB_VERSION_GET_MAJOR(PCILIB_VERSION), PCILIB_VERSION_GET_MINOR(PCILIB_VERSION), PCILIB_VERSION_GET_MICRO(PCILIB_VERSION));
-	mod_info("%s\n", PCIDRIVER_BUILD);
-	mod_info("%s\n", PCIDRIVER_REVISION);
-	if (strlen(PCIDRIVER_CHANGES)) {
-	    mod_info("Extra changes - %s\n", PCIDRIVER_CHANGES);
-	}
+    mod_info("pcidriver %u.%u.%u loaded\n", PCILIB_VERSION_GET_MAJOR(PCILIB_VERSION), PCILIB_VERSION_GET_MINOR(PCILIB_VERSION), PCILIB_VERSION_GET_MICRO(PCILIB_VERSION));
+    mod_info("%s\n", PCIDRIVER_BUILD);
+    mod_info("%s\n", PCIDRIVER_REVISION);
+    if (strlen(PCIDRIVER_CHANGES)) {
+        mod_info("Extra changes - %s\n", PCIDRIVER_CHANGES);
+    }
 
-	return 0;
+    return 0;
 
 init_pcireg_fail:
-	class_destroy(pcidriver_class);
+    class_destroy(pcidriver_class);
 init_class_fail:
-	unregister_chrdev_region(pcidriver_devt, MAXDEVICES);
+    unregister_chrdev_region(pcidriver_devt, MAXDEVICES);
 init_alloc_fail:
-	return err;
+    return err;
 }
 
 /**
@@ -279,17 +127,17 @@ init_alloc_fail:
 static void pcidriver_exit(void)
 {
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	pcidriver_remove(NULL);
+    pcidriver_remove(NULL);
 #else
-	pci_unregister_driver(&pcidriver_driver);
+    pci_unregister_driver(&pcidriver_driver);
 #endif /* PCIDRIVER_DUMMY_DEVICE */
 
-	unregister_chrdev_region(pcidriver_devt, MAXDEVICES);
+    unregister_chrdev_region(pcidriver_devt, MAXDEVICES);
 
-	if (pcidriver_class != NULL)
-		class_destroy(pcidriver_class);
+    if (pcidriver_class != NULL)
+        class_destroy(pcidriver_class);
 
-	mod_info("Module unloaded\n");
+    mod_info("Module unloaded\n");
 }
 
 /*************************************************************************/
@@ -303,10 +151,10 @@ static void pcidriver_exit(void)
  */
 #ifndef PCIDRIVER_DUMMY_DEVICE
 static struct pci_driver pcidriver_driver = {
-	.name = MODNAME,
-	.id_table = pcidriver_ids,
-	.probe = pcidriver_probe,
-	.remove = pcidriver_remove,
+    .name = MODNAME,
+    .id_table = pcidriver_ids,
+    .probe = pcidriver_probe,
+    .remove = pcidriver_remove,
 };
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
 
@@ -318,155 +166,155 @@ static struct pci_driver pcidriver_driver = {
  */
 static int __devinit pcidriver_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
-	int err = 0;
-	int devno;
-	pcidriver_privdata_t *privdata;
-	int devid;
-
-	/* At the moment there is no difference between these boards here, other than
-	 * printing a different message in the log.
-	 *
-	 * However, there is some difference in the interrupt handling functions.
-	 */
+    int err = 0;
+    int devno;
+    pcidriver_privdata_t *privdata;
+    int devid;
+
+    /* At the moment there is no difference between these boards here, other than
+     * printing a different message in the log.
+     *
+     * However, there is some difference in the interrupt handling functions.
+     */
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	mod_info("Emulated device\n");
+    mod_info("Emulated device\n");
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	if (id->vendor == PCIE_XILINX_VENDOR_ID) {
-	    if (id->device == PCIE_ML605_DEVICE_ID) {
-		mod_info("Found ML605 board at %s\n", dev_name(&pdev->dev));
-	    } else if (id->device == PCIE_IPECAMERA_DEVICE_ID) {
-		mod_info("Found IPE Camera at %s\n", dev_name(&pdev->dev));
-	    } else if (id->device == PCIE_KAPTURE_DEVICE_ID) {
-		mod_info("Found KAPTURE board at %s\n", dev_name(&pdev->dev));
-	    } else {
-		mod_info("Found unknown Xilinx device (%x) at %s\n", id->device, dev_name(&pdev->dev));
-	    }
-	} else {
-	    /* It is something else */
-	    mod_info("Found unknown board (%x:%x) at %s\n", id->vendor, id->device, dev_name(&pdev->dev));
-	}
-
-	/* Enable the device */
-	if ((err = pci_enable_device(pdev)) != 0) {
-	    mod_info("Couldn't enable device\n");
-	    goto probe_pcien_fail;
-	}
-	
-	/* Bus master & dma */
-	pci_set_master(pdev);
-	    
-	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
-	if (err < 0) {
-	    printk(KERN_ERR "pci_set_dma_mask failed\n");
-	    goto probe_dma_fail;
-	}
-
-	/* Set Memory-Write-Invalidate support */
-	if ((err = pci_set_mwi(pdev)) != 0)
-	    mod_info("MWI not supported. Continue without enabling MWI.\n");
+    if (id->vendor == PCIE_XILINX_VENDOR_ID) {
+        if (id->device == PCIE_ML605_DEVICE_ID) {
+            mod_info("Found ML605 board at %s\n", dev_name(&pdev->dev));
+        } else if (id->device == PCIE_IPECAMERA_DEVICE_ID) {
+            mod_info("Found IPE Camera at %s\n", dev_name(&pdev->dev));
+        } else if (id->device == PCIE_KAPTURE_DEVICE_ID) {
+            mod_info("Found KAPTURE board at %s\n", dev_name(&pdev->dev));
+        } else {
+            mod_info("Found unknown Xilinx device (%x) at %s\n", id->device, dev_name(&pdev->dev));
+        }
+    } else {
+        /* It is something else */
+        mod_info("Found unknown board (%x:%x) at %s\n", id->vendor, id->device, dev_name(&pdev->dev));
+    }
+
+    /* Enable the device */
+    if ((err = pci_enable_device(pdev)) != 0) {
+        mod_info("Couldn't enable device\n");
+        goto probe_pcien_fail;
+    }
+
+    /* Bus master & dma */
+    pci_set_master(pdev);
+
+    err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+    if (err < 0) {
+        printk(KERN_ERR "pci_set_dma_mask failed\n");
+        goto probe_dma_fail;
+    }
+
+    /* Set Memory-Write-Invalidate support */
+    if ((err = pci_set_mwi(pdev)) != 0)
+        mod_info("MWI not supported. Continue without enabling MWI.\n");
 #endif /* PCIDRIVER_DUMMY_DEVICE */
 
-	/* Get / Increment the device id */
-	devid = atomic_inc_return(&pcidriver_deviceCount) - 1;
-	if (devid >= MAXDEVICES) {
-		mod_info("Maximum number of devices reached! Increase MAXDEVICES.\n");
-		err = -ENOMSG;
-		goto probe_maxdevices_fail;
-	}
-
-	/* Allocate and initialize the private data for this device */
-	if ((privdata = kcalloc(1, sizeof(*privdata), GFP_KERNEL)) == NULL) {
-		err = -ENOMEM;
-		goto probe_nomem;
-	}
-	
-	privdata->devid = devid;
-
-	INIT_LIST_HEAD(&(privdata->kmem_list));
-	spin_lock_init(&(privdata->kmemlist_lock));
-	atomic_set(&privdata->kmem_count, 0);
-	
-	INIT_LIST_HEAD(&(privdata->umem_list));
-	spin_lock_init(&(privdata->umemlist_lock));
-	atomic_set(&privdata->umem_count, 0);
+    /* Get / Increment the device id */
+    devid = atomic_inc_return(&pcidriver_deviceCount) - 1;
+    if (devid >= MAXDEVICES) {
+        mod_info("Maximum number of devices reached! Increase MAXDEVICES.\n");
+        err = -ENOMSG;
+        goto probe_maxdevices_fail;
+    }
+
+    /* Allocate and initialize the private data for this device */
+    if ((privdata = kcalloc(1, sizeof(*privdata), GFP_KERNEL)) == NULL) {
+        err = -ENOMEM;
+        goto probe_nomem;
+    }
+
+    privdata->devid = devid;
+
+    INIT_LIST_HEAD(&(privdata->kmem_list));
+    spin_lock_init(&(privdata->kmemlist_lock));
+    atomic_set(&privdata->kmem_count, 0);
+
+    INIT_LIST_HEAD(&(privdata->umem_list));
+    spin_lock_init(&(privdata->umemlist_lock));
+    atomic_set(&privdata->umem_count, 0);
 
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	pcidriver_dummydata = privdata;
+    pcidriver_dummydata = privdata;
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	pci_set_drvdata(pdev, privdata);
-	privdata->pdev = pdev;
+    pci_set_drvdata(pdev, privdata);
+    privdata->pdev = pdev;
 #endif /* PCIDRIVER_DUMMY_DEVICE */
 
-	/* Device add to sysfs */
-	devno = MKDEV(MAJOR(pcidriver_devt), MINOR(pcidriver_devt) + devid);
-	privdata->devno = devno;
+    /* Device add to sysfs */
+    devno = MKDEV(MAJOR(pcidriver_devt), MINOR(pcidriver_devt) + devid);
+    privdata->devno = devno;
 
-	/* FIXME: some error checking missing here */
+    /* FIXME: some error checking missing here */
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	privdata->class_dev = class_device_create(pcidriver_class, NULL, devno, NULL, NODENAMEFMT, MINOR(pcidriver_devt) + devid, privdata);
+    privdata->class_dev = class_device_create(pcidriver_class, NULL, devno, NULL, NODENAMEFMT, MINOR(pcidriver_devt) + devid, privdata);
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	privdata->class_dev = class_device_create(pcidriver_class, NULL, devno, &(pdev->dev), NODENAMEFMT, MINOR(pcidriver_devt) + devid, privdata);
+    privdata->class_dev = class_device_create(pcidriver_class, NULL, devno, &(pdev->dev), NODENAMEFMT, MINOR(pcidriver_devt) + devid, privdata);
 #endif /* PCIDRIVER_DUMMY_DEVICE */
-	class_set_devdata( privdata->class_dev, privdata );
-	mod_info("Device /dev/%s%d added\n",NODENAME,MINOR(pcidriver_devt) + devid);
+    class_set_devdata( privdata->class_dev, privdata );
+    mod_info("Device /dev/%s%d added\n",NODENAME,MINOR(pcidriver_devt) + devid);
 
 #ifndef PCIDRIVER_DUMMY_DEVICE
-	/* Setup mmaped BARs into kernel space */
-	if ((err = pcidriver_probe_irq(privdata)) != 0)
-		goto probe_irq_probe_fail;
+    /* Setup mmaped BARs into kernel space */
+    if ((err = pcidriver_probe_irq(privdata)) != 0)
+        goto probe_irq_probe_fail;
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
 
-	/* Populate sysfs attributes for the class device */
-	/* TODO: correct errorhandling. ewww. must remove the files in reversed order :-( */
-	#define sysfs_attr(name) do { \
+    /* Populate sysfs attributes for the class device */
+    /* TODO: correct errorhandling. ewww. must remove the files in reversed order :-( */
+#define sysfs_attr(name) do { \
 			if (class_device_create_file(sysfs_attr_def_pointer, &sysfs_attr_def_name(name)) != 0) \
 				goto probe_device_create_fail; \
 			} while (0)
-	#ifdef ENABLE_IRQ
-	sysfs_attr(irq_count);
-	sysfs_attr(irq_queues);
-	#endif
-
-	sysfs_attr(mmap_mode);
-	sysfs_attr(mmap_area);
-	sysfs_attr(kmem_count);
-	sysfs_attr(kmem_alloc);
-	sysfs_attr(kmem_free);
-	sysfs_attr(kbuffers);
-	sysfs_attr(umappings);
-	sysfs_attr(umem_unmap);
-	#undef sysfs_attr
-
-	/* Register character device */
-	cdev_init( &(privdata->cdev), &pcidriver_fops );
-	privdata->cdev.owner = THIS_MODULE;
-	privdata->cdev.ops = &pcidriver_fops;
-	err = cdev_add( &privdata->cdev, devno, 1 );
-	if (err) {
-		mod_info( "Couldn't add character device.\n" );
-		goto probe_cdevadd_fail;
-	}
-
-        pcidriver_privdata[devid] = privdata;
-
-	return 0;
+#ifdef ENABLE_IRQ
+    sysfs_attr(irq_count);
+    sysfs_attr(irq_queues);
+#endif
+
+    sysfs_attr(mmap_mode);
+    sysfs_attr(mmap_area);
+    sysfs_attr(kmem_count);
+    sysfs_attr(kmem_alloc);
+    sysfs_attr(kmem_free);
+    sysfs_attr(kbuffers);
+    sysfs_attr(umappings);
+    sysfs_attr(umem_unmap);
+#undef sysfs_attr
+
+    /* Register character device */
+    cdev_init( &(privdata->cdev), &pcidriver_fops );
+    privdata->cdev.owner = THIS_MODULE;
+    privdata->cdev.ops = &pcidriver_fops;
+    err = cdev_add( &privdata->cdev, devno, 1 );
+    if (err) {
+        mod_info( "Couldn't add character device.\n" );
+        goto probe_cdevadd_fail;
+    }
+
+    pcidriver_privdata[devid] = privdata;
+
+    return 0;
 
 probe_device_create_fail:
 probe_cdevadd_fail:
 #ifndef PCIDRIVER_DUMMY_DEVICE
 probe_irq_probe_fail:
-	pcidriver_irq_unmap_bars(privdata);
+    pcidriver_irq_unmap_bars(privdata);
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
-	kfree(privdata);
+    kfree(privdata);
 probe_nomem:
-	atomic_dec(&pcidriver_deviceCount);
+    atomic_dec(&pcidriver_deviceCount);
 probe_maxdevices_fail:
 #ifndef PCIDRIVER_DUMMY_DEVICE
 probe_dma_fail:
-	pci_disable_device(pdev);
+    pci_disable_device(pdev);
 probe_pcien_fail:
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
- 	return err;
+    return err;
 }
 
 /**
@@ -476,62 +324,62 @@ probe_pcien_fail:
  */
 static void __devexit pcidriver_remove(struct pci_dev *pdev)
 {
-	pcidriver_privdata_t *privdata;
+    pcidriver_privdata_t *privdata;
 
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	privdata = pcidriver_dummydata;
-	pcidriver_dummydata = NULL;
+    privdata = pcidriver_dummydata;
+    pcidriver_dummydata = NULL;
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	/* Get private data from the device */
-	privdata = pci_get_drvdata(pdev);
+    /* Get private data from the device */
+    privdata = pci_get_drvdata(pdev);
 #endif /* PCIDRIVER_DUMMY_DEVICE */
 
-            // Theoretically we should lock here and when using...
-        pcidriver_privdata[privdata->devid] = NULL;
+    // Theoretically we should lock here and when using...
+    pcidriver_privdata[privdata->devid] = NULL;
 
-	/* Removing sysfs attributes from class device */
-	#define sysfs_attr(name) do { \
+    /* Removing sysfs attributes from class device */
+#define sysfs_attr(name) do { \
 			class_device_remove_file(sysfs_attr_def_pointer, &sysfs_attr_def_name(name)); \
 			} while (0)
-	#ifdef ENABLE_IRQ
-	sysfs_attr(irq_count);
-	sysfs_attr(irq_queues);
-	#endif
-
-	sysfs_attr(mmap_mode);
-	sysfs_attr(mmap_area);
-	sysfs_attr(kmem_count);
-	sysfs_attr(kmem_alloc);
-	sysfs_attr(kmem_free);
-	sysfs_attr(kbuffers);
-	sysfs_attr(umappings);
-	sysfs_attr(umem_unmap);
-	#undef sysfs_attr
-
-	/* Free all allocated kmem buffers before leaving */
-	pcidriver_kmem_free_all( privdata );
+#ifdef ENABLE_IRQ
+    sysfs_attr(irq_count);
+    sysfs_attr(irq_queues);
+#endif
+
+    sysfs_attr(mmap_mode);
+    sysfs_attr(mmap_area);
+    sysfs_attr(kmem_count);
+    sysfs_attr(kmem_alloc);
+    sysfs_attr(kmem_free);
+    sysfs_attr(kbuffers);
+    sysfs_attr(umappings);
+    sysfs_attr(umem_unmap);
+#undef sysfs_attr
+
+    /* Free all allocated kmem buffers before leaving */
+    pcidriver_kmem_free_all( privdata );
 
 #ifndef PCIDRIVER_DUMMY_DEVICE
 # ifdef ENABLE_IRQ
-	pcidriver_remove_irq(privdata);
+    pcidriver_remove_irq(privdata);
 # endif
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
 
-	/* Removing Character device */
-	cdev_del(&(privdata->cdev));
+    /* Removing Character device */
+    cdev_del(&(privdata->cdev));
 
-	/* Removing the device from sysfs */
-	class_device_destroy(pcidriver_class, privdata->devno);
+    /* Removing the device from sysfs */
+    class_device_destroy(pcidriver_class, privdata->devno);
 
-	/* Releasing privdata */
-	kfree(privdata);
+    /* Releasing privdata */
+    kfree(privdata);
 
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	mod_info("Device at " NODENAMEFMT " removed\n", 0);
+    mod_info("Device at " NODENAMEFMT " removed\n", 0);
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	/* Disabling PCI device */
-	pci_disable_device(pdev);
-	mod_info("Device at %s removed\n", dev_name(&pdev->dev));
+    /* Disabling PCI device */
+    pci_disable_device(pdev);
+    mod_info("Device at %s removed\n", dev_name(&pdev->dev));
 #endif /* PCIDRIVER_DUMMY_DEVICE */
 
 }
@@ -550,15 +398,11 @@ static void __devexit pcidriver_remove(struct pci_dev *pdev)
  *
  */
 static struct file_operations pcidriver_fops = {
-	.owner = THIS_MODULE,
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
-	.ioctl = pcidriver_ioctl,
-#else
-	.unlocked_ioctl = pcidriver_ioctl,
-#endif 
-	.mmap = pcidriver_mmap,
-	.open = pcidriver_open,
-	.release = pcidriver_release,
+    .owner = THIS_MODULE,
+    .unlocked_ioctl = pcidriver_ioctl,
+    .mmap = pcidriver_mmap,
+    .open = pcidriver_open,
+    .release = pcidriver_release,
 };
 
 void pcidriver_module_get(pcidriver_privdata_t *privdata) {
@@ -568,8 +412,8 @@ void pcidriver_module_get(pcidriver_privdata_t *privdata) {
 
 void pcidriver_module_put(pcidriver_privdata_t *privdata) {
     if (atomic_add_negative(-1, &(privdata->refs))) {
-	atomic_inc(&(privdata->refs));
-	mod_info("Reference counting error...");
+        atomic_inc(&(privdata->refs));
+        mod_info("Reference counting error...");
     } else {
 //	mod_info("Unref: %i\n", atomic_read(&(privdata->refs)));
     }
@@ -583,15 +427,15 @@ void pcidriver_module_put(pcidriver_privdata_t *privdata) {
  */
 int pcidriver_open(struct inode *inode, struct file *filp)
 {
-	pcidriver_privdata_t *privdata;
+    pcidriver_privdata_t *privdata;
 
-	/* Set the private data area for the file */
-	privdata = container_of( inode->i_cdev, pcidriver_privdata_t, cdev);
-	filp->private_data = privdata;
+    /* Set the private data area for the file */
+    privdata = container_of( inode->i_cdev, pcidriver_privdata_t, cdev);
+    filp->private_data = privdata;
 
-	pcidriver_module_get(privdata);
+    pcidriver_module_get(privdata);
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -602,14 +446,14 @@ int pcidriver_open(struct inode *inode, struct file *filp)
  */
 int pcidriver_release(struct inode *inode, struct file *filp)
 {
-	pcidriver_privdata_t *privdata;
+    pcidriver_privdata_t *privdata;
 
-	/* Get the private data area */
-	privdata = filp->private_data;
+    /* Get the private data area */
+    privdata = filp->private_data;
 
-	pcidriver_module_put(privdata);
+    pcidriver_module_put(privdata);
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -623,42 +467,54 @@ int pcidriver_release(struct inode *inode, struct file *filp)
  */
 int pcidriver_mmap(struct file *filp, struct vm_area_struct *vma)
 {
-	pcidriver_privdata_t *privdata;
-	int ret = 0, bar;
-
-	mod_info_dbg("Entering mmap\n");
-
-	/* Get the private data area */
-	privdata = filp->private_data;
-
-	/* Check the current mmap mode */
-	switch (privdata->mmap_mode) {
-		case PCIDRIVER_MMAP_PCI:
-			/* Mmap a PCI region */
-			switch (privdata->mmap_area) {
-				case PCIDRIVER_BAR0:	bar = 0; break;
-				case PCIDRIVER_BAR1:	bar = 1; break;
-				case PCIDRIVER_BAR2:	bar = 2; break;
-				case PCIDRIVER_BAR3:	bar = 3; break;
-				case PCIDRIVER_BAR4:	bar = 4; break;
-				case PCIDRIVER_BAR5:	bar = 5; break;
-				default:
-					mod_info("Attempted to mmap a PCI area with the wrong mmap_area value: %d\n",privdata->mmap_area);
-					return -EINVAL;			/* invalid parameter */
-					break;
-			}
-			ret = pcidriver_mmap_pci(privdata, vma, bar);
-			break;
-		case PCIDRIVER_MMAP_KMEM:
-			/* mmap a Kernel buffer */
-			ret = pcidriver_mmap_kmem(privdata, vma);
-			break;
-		default:
-			mod_info( "Invalid mmap_mode value (%d)\n",privdata->mmap_mode );
-			return -EINVAL;			/* Invalid parameter (mode) */
-	}
-
-	return ret;
+    pcidriver_privdata_t *privdata;
+    int ret = 0, bar;
+
+    mod_info_dbg("Entering mmap\n");
+
+    /* Get the private data area */
+    privdata = filp->private_data;
+
+    /* Check the current mmap mode */
+    switch (privdata->mmap_mode) {
+    case PCIDRIVER_MMAP_PCI:
+        /* Mmap a PCI region */
+        switch (privdata->mmap_area) {
+        case PCIDRIVER_BAR0:
+            bar = 0;
+            break;
+        case PCIDRIVER_BAR1:
+            bar = 1;
+            break;
+        case PCIDRIVER_BAR2:
+            bar = 2;
+            break;
+        case PCIDRIVER_BAR3:
+            bar = 3;
+            break;
+        case PCIDRIVER_BAR4:
+            bar = 4;
+            break;
+        case PCIDRIVER_BAR5:
+            bar = 5;
+            break;
+        default:
+            mod_info("Attempted to mmap a PCI area with the wrong mmap_area value: %d\n",privdata->mmap_area);
+            return -EINVAL;			/* invalid parameter */
+            break;
+        }
+        ret = pcidriver_mmap_pci(privdata, vma, bar);
+        break;
+    case PCIDRIVER_MMAP_KMEM:
+        /* mmap a Kernel buffer */
+        ret = pcidriver_mmap_kmem(privdata, vma);
+        break;
+    default:
+        mod_info( "Invalid mmap_mode value (%d)\n",privdata->mmap_mode );
+        return -EINVAL;			/* Invalid parameter (mode) */
+    }
+
+    return ret;
 }
 
 /*************************************************************************/
@@ -666,76 +522,65 @@ int pcidriver_mmap(struct file *filp, struct vm_area_struct *vma)
 int pcidriver_mmap_pci(pcidriver_privdata_t *privdata, struct vm_area_struct *vmap, int bar)
 {
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	return -ENXIO;
+    return -ENXIO;
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	int ret = 0;
-	unsigned long bar_addr;
-	unsigned long bar_length, vma_size;
-	unsigned long bar_flags;
+    int ret = 0;
+    unsigned long bar_addr;
+    unsigned long bar_length, vma_size;
+    unsigned long bar_flags;
 
-	mod_info_dbg("Entering mmap_pci\n");
+    mod_info_dbg("Entering mmap_pci\n");
 
 
-	/* Get info of the BAR to be mapped */
-	bar_addr = pci_resource_start(privdata->pdev, bar);
-	bar_length = pci_resource_len(privdata->pdev, bar);
-	bar_flags = pci_resource_flags(privdata->pdev, bar);
+    /* Get info of the BAR to be mapped */
+    bar_addr = pci_resource_start(privdata->pdev, bar);
+    bar_length = pci_resource_len(privdata->pdev, bar);
+    bar_flags = pci_resource_flags(privdata->pdev, bar);
 
-	/* Check sizes */
-	vma_size = (vmap->vm_end - vmap->vm_start);
+    /* Check sizes */
+    vma_size = (vmap->vm_end - vmap->vm_start);
 
-	if ((vma_size != bar_length) &&
-	   ((bar_length < PAGE_SIZE) && (vma_size != PAGE_SIZE))) {
-		mod_info( "mmap size is not correct! bar: %lu - vma: %lu\n", bar_length, vma_size );
-		return -EINVAL;
-	}
+    if ((vma_size != bar_length) &&
+            ((bar_length < PAGE_SIZE) && (vma_size != PAGE_SIZE))) {
+        mod_info( "mmap size is not correct! bar: %lu - vma: %lu\n", bar_length, vma_size );
+        return -EINVAL;
+    }
 
-	if (bar_flags & IORESOURCE_IO) {
-		/* Unlikely case, we will mmap a IO region */
+    if (bar_flags & IORESOURCE_IO) {
+        /* Unlikely case, we will mmap a IO region */
 
-		/* IO regions are never cacheable */
-#ifdef pgprot_noncached
-		vmap->vm_page_prot = pgprot_noncached(vmap->vm_page_prot);
-#endif
+        /* IO regions are never cacheable */
+        vmap->vm_page_prot = pgprot_noncached(vmap->vm_page_prot);
 
-		/* Map the BAR */
-		ret = io_remap_pfn_range_compat(
-					vmap,
-					vmap->vm_start,
-					bar_addr,
-					bar_length,
-					vmap->vm_page_prot);
-	} else {
-		/* Normal case, mmap a memory region */
-
-		/* Ensure this VMA is non-cached, if it is not flaged as prefetchable.
-		 * If it is prefetchable, caching is allowed and will give better performance.
-		 * This should be set properly by the BIOS, but we want to be sure. */
-		/* adapted from drivers/char/mem.c, mmap function. */
-#ifdef pgprot_noncached
-/* Setting noncached disables MTRR registers, and we want to use them.
- * So we take this code out. This can lead to caching problems if and only if
- * the System BIOS set something wrong. Check LDDv3, page 425.
- */
-//		if (!(bar_flags & IORESOURCE_PREFETCH))
+        /* Map the BAR */
+        ret = io_remap_pfn_range_compat(vmap, vmap->vm_start, bar_addr, bar_length, vmap->vm_page_prot);
+    } else {
+        /* Normal case, mmap a memory region */
+
+        /* Ensure this VMA is non-cached, if it is not flaged as prefetchable.
+         * If it is prefetchable, caching is allowed and will give better performance.
+         * This should be set properly by the BIOS, but we want to be sure. */
+        /* adapted from drivers/char/mem.c, mmap function. */
+
+        /* Setting noncached disables MTRR registers, and we want to use them.
+         * So we take this code out. This can lead to caching problems if and only if
+         * the System BIOS set something wrong. Check LDDv3, page 425.
+         */
+
+//                if (!(bar_flags & IORESOURCE_PREFETCH))
 //			vmap->vm_page_prot = pgprot_noncached(vmap->vm_page_prot);
-#endif
 
-		/* Map the BAR */
-		ret = remap_pfn_range_compat(
-					vmap,
-					vmap->vm_start,
-					bar_addr,
-					bar_length,
-					vmap->vm_page_prot);
-	}
-
-	if (ret) {
-		mod_info("remap_pfn_range failed\n");
-		return -EAGAIN;
-	}
-
-	return 0;	/* success */
+
+        /* Map the BAR */
+        ret = remap_pfn_range_compat(vmap, vmap->vm_start, bar_addr, bar_length, vmap->vm_page_prot);
+    }
+
+    if (ret) {
+        mod_info("remap_pfn_range failed\n");
+        return -EAGAIN;
+    }
+
+    return 0;	/* success */
 #endif /* PCIDRIVER_DUMMY_DEVICE */
 }
 
diff --git a/driver/base.h b/driver/base.h
index dce865f..8556480 100644
--- a/driver/base.h
+++ b/driver/base.h
@@ -47,10 +47,10 @@ static void pcidriver_exit(void);
  */
 
 static const __devinitdata struct pci_device_id pcidriver_ids[] = {
-	{ PCI_DEVICE( PCIE_XILINX_VENDOR_ID, PCIE_ML605_DEVICE_ID ) },          // PCI-E Xilinx ML605
-	{ PCI_DEVICE( PCIE_XILINX_VENDOR_ID, PCIE_IPECAMERA_DEVICE_ID ) },      // PCI-E IPE Camera
-	{ PCI_DEVICE( PCIE_XILINX_VENDOR_ID, PCIE_KAPTURE_DEVICE_ID ) },        // PCI-E KAPTURE board for HEB
-	{0,0,0,0},
+    { PCI_DEVICE( PCIE_XILINX_VENDOR_ID, PCIE_ML605_DEVICE_ID ) },          // PCI-E Xilinx ML605
+    { PCI_DEVICE( PCIE_XILINX_VENDOR_ID, PCIE_IPECAMERA_DEVICE_ID ) },      // PCI-E IPE Camera
+    { PCI_DEVICE( PCIE_XILINX_VENDOR_ID, PCIE_KAPTURE_DEVICE_ID ) },        // PCI-E KAPTURE board for HEB
+    {0,0,0,0},
 };
 
 /* prototypes for internal driver functions */
diff --git a/driver/common.h b/driver/common.h
index a83fd5e..48b2769 100644
--- a/driver/common.h
+++ b/driver/common.h
@@ -9,70 +9,70 @@
 /* Define an entry in the kmem list (this list is per device) */
 /* This list keeps references to the allocated kernel buffers */
 typedef struct {
-	int id;
-	enum dma_data_direction direction;
-	
-	struct list_head list;
-	dma_addr_t dma_handle;
-	unsigned long cpua;
-	unsigned long size;
-	unsigned long type;
-	unsigned long align;
-
-	unsigned long use;
-	unsigned long item;
-
-	spinlock_t lock;
-	unsigned long mode;
-	unsigned long refs;
-
-	struct class_device_attribute sysfs_attr;	/* initialized when adding the entry */
+    int id;
+    enum dma_data_direction direction;
+
+    struct list_head list;
+    dma_addr_t dma_handle;
+    unsigned long cpua;
+    unsigned long size;
+    unsigned long type;
+    unsigned long align;
+
+    unsigned long use;
+    unsigned long item;
+
+    spinlock_t lock;
+    unsigned long mode;
+    unsigned long refs;
+
+    struct class_device_attribute sysfs_attr;	/* initialized when adding the entry */
 } pcidriver_kmem_entry_t;
 
 /* Define an entry in the umem list (this list is per device) */
 /* This list keeps references to the SG lists for each mapped userspace region */
 typedef struct {
-	int id;
-	struct list_head list;
-	unsigned int nr_pages;		/* number of pages for this user memeory area */
-	struct page **pages;		/* list of pointers to the pages */
-	unsigned int nents;		/* actual entries in the scatter/gatter list (NOT nents for the map function, but the result) */
-	struct scatterlist *sg;		/* list of sg entries */
-	struct class_device_attribute sysfs_attr;	/* initialized when adding the entry */
+    int id;
+    struct list_head list;
+    unsigned int nr_pages;		/* number of pages for this user memeory area */
+    struct page **pages;		/* list of pointers to the pages */
+    unsigned int nents;		/* actual entries in the scatter/gatter list (NOT nents for the map function, but the result) */
+    struct scatterlist *sg;		/* list of sg entries */
+    struct class_device_attribute sysfs_attr;	/* initialized when adding the entry */
 } pcidriver_umem_entry_t;
 
 /* Hold the driver private data */
 typedef struct  {
-        int devid;                                      /* the device id */
-	dev_t devno;					/* device number (major and minor) */
-	struct pci_dev *pdev;				/* PCI device */
-	struct class_device *class_dev;                 /* Class device */
-	struct cdev cdev;				/* char device struct */
-	int mmap_mode;					/* current mmap mode */
-	int mmap_area;					/* current PCI mmap area */
+    int devid;                                      /* the device id */
+    dev_t devno;					/* device number (major and minor) */
+    struct pci_dev *pdev;				/* PCI device */
+    struct class_device *class_dev;                 /* Class device */
+    struct cdev cdev;				/* char device struct */
+    int mmap_mode;					/* current mmap mode */
+    int mmap_area;					/* current PCI mmap area */
 
 #ifdef ENABLE_IRQ
-	int irq_enabled;				/* Non-zero if IRQ is enabled */
-	int irq_count;					/* Just an IRQ counter */
+    int irq_enabled;				/* Non-zero if IRQ is enabled */
+    int irq_count;					/* Just an IRQ counter */
 
-	wait_queue_head_t irq_queues[ PCIDRIVER_INT_MAXSOURCES ];       /* One queue per interrupt source */
-	atomic_t irq_outstanding[ PCIDRIVER_INT_MAXSOURCES ];           /* Outstanding interrupts per queue */
-	volatile unsigned int *bars_kmapped[6];		                /* PCI BARs mmapped in kernel space */
+    wait_queue_head_t irq_queues[ PCIDRIVER_INT_MAXSOURCES ];       /* One queue per interrupt source */
+    atomic_t irq_outstanding[ PCIDRIVER_INT_MAXSOURCES ];           /* Outstanding interrupts per queue */
+    volatile unsigned int *bars_kmapped[6];		                /* PCI BARs mmapped in kernel space */
 #endif
-	
-	spinlock_t kmemlist_lock;			/* Spinlock to lock kmem list operations */
-	struct list_head kmem_list;			/* List of 'kmem_list_entry's associated with this device */
-	pcidriver_kmem_entry_t *kmem_last_sync;		/* Last accessed kmem entry */
-	atomic_t kmem_count;				/* id for next kmem entry */
-
-	int kmem_cur_id;				/* Currently selected kmem buffer, for mmap */
-	
-	spinlock_t umemlist_lock;			/* Spinlock to lock umem list operations */
-	struct list_head umem_list;			/* List of 'umem_list_entry's associated with this device */
-	atomic_t umem_count;				/* id for next umem entry */
-
-	int msi_mode;					/* Flag specifying if interrupt have been initialized in MSI mode */
-	atomic_t refs;					/* Reference counter */
+
+    spinlock_t kmemlist_lock;			/* Spinlock to lock kmem list operations */
+    struct list_head kmem_list;			/* List of 'kmem_list_entry's associated with this device */
+    pcidriver_kmem_entry_t *kmem_last_sync;		/* Last accessed kmem entry */
+    atomic_t kmem_count;				/* id for next kmem entry */
+
+    int kmem_cur_id;				/* Currently selected kmem buffer, for mmap */
+
+    spinlock_t umemlist_lock;			/* Spinlock to lock umem list operations */
+    struct list_head umem_list;			/* List of 'umem_list_entry's associated with this device */
+    atomic_t umem_count;				/* id for next umem entry */
+
+    int msi_mode;					/* Flag specifying if interrupt have been initialized in MSI mode */
+    atomic_t refs;					/* Reference counter */
 } pcidriver_privdata_t;
 
 
@@ -88,17 +88,17 @@ void pcidriver_put_privdata(pcidriver_privdata_t *privdata);
 /* This is to print nice info in the log */
 
 #ifdef DEBUG
- #define mod_info( args... ) \
+#define mod_info( args... ) \
     do { printk( KERN_INFO "%s - %s : ", MODNAME , __FUNCTION__ );\
     printk( args ); } while(0)
- #define mod_info_dbg( args... ) \
+#define mod_info_dbg( args... ) \
     do { printk( KERN_INFO "%s - %s : ", MODNAME , __FUNCTION__ );\
     printk( args ); } while(0)
 #else
- #define mod_info( args... ) \
+#define mod_info( args... ) \
     do { printk( KERN_INFO "%s: ", MODNAME );\
     printk( args ); } while(0)
- #define mod_info_dbg( args... ) 
+#define mod_info_dbg( args... )
 #endif
 
 #define mod_crit( args... ) \
diff --git a/driver/compat.c b/driver/compat.c
index a632781..f28f527 100644
--- a/driver/compat.c
+++ b/driver/compat.c
@@ -2,25 +2,24 @@
 
 int pcidriver_pcie_get_mps(struct pci_dev *dev)
 {
-        u16 ctl;
+    u16 ctl;
 
-        pcie_capability_read_word(dev, PCI_EXP_DEVCTL, &ctl);
+    pcie_capability_read_word(dev, PCI_EXP_DEVCTL, &ctl);
 
-        return 128 << ((ctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5);
+    return 128 << ((ctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5);
 }
 
 int pcidriver_pcie_set_mps(struct pci_dev *dev, int mps)
 {
-        u16 v;
+    u16 v;
 
-        if (mps < 128 || mps > 4096 || !is_power_of_2(mps))
-                return -EINVAL;
+    if (mps < 128 || mps > 4096 || !is_power_of_2(mps))
+        return -EINVAL;
 
-        v = ffs(mps) - 8;
-        if (v > dev->pcie_mpss)
-                return -EINVAL;
-        v <<= 5;
+    v = ffs(mps) - 8;
+    if (v > dev->pcie_mpss)
+        return -EINVAL;
+    v <<= 5;
 
-        return pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL,
-                                                  PCI_EXP_DEVCTL_PAYLOAD, v);
+    return pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_PAYLOAD, v);
 }
diff --git a/driver/compat.h b/driver/compat.h
index 5232a22..a8a2cf0 100644
--- a/driver/compat.h
+++ b/driver/compat.h
@@ -10,196 +10,72 @@
 #ifndef _COMPAT_H
 #define _COMPAT_H
 
-/*
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,0,0)
-# error "Linux 3.0 and latter are supported"
-#endif
-*/
+#include <linux/version.h>
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
-# define __devinit
-# define __devexit
-# define __devinitdata
+/* Check macros and kernel version first */
+#ifndef KERNEL_VERSION
+# error "No KERNEL_VERSION macro! Stopping."
 #endif
 
-/* dev_name is the wrapper one needs to use to access what was formerly called
- * bus_id in struct device. However, before 2.6.27, direct access was necessary,
- * so we provide our own version. */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
-static inline const char *dev_name(struct device *dev) {
-	return dev->bus_id;
-}
+#ifndef LINUX_VERSION_CODE
+# error "No LINUX_VERSION_CODE macro! Stopping."
 #endif
 
-/* SetPageLocked disappeared in v2.6.27 */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
-	#define compat_lock_page SetPageLocked
-	#define compat_unlock_page ClearPageLocked
-#else
-	/* in v2.6.28, __set_page_locked and __clear_page_locked was introduced */
-	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
-		#define compat_lock_page __set_page_locked
-		#define compat_unlock_page __clear_page_locked
-	#else
-		/* However, in v2.6.27 itself, neither of them is there, so
-		 * we need to use our own function fiddling with bits inside
-		 * the page struct :-\ */
-		static inline void compat_lock_page(struct page *page) {
-			__set_bit(PG_locked, &page->flags);
-		}
-
-		static inline void compat_unlock_page(struct page *page) {
-			__clear_bit(PG_locked, &page->flags);
-		}
-	#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,2,0)
+# error "Linux 3.2 and latter are supported"
 #endif
 
-/* Before 2.6.13, simple_class was the standard interface. Nowadays, it's just called class */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,13)
-
-	#define class_compat class_simple
-
-	/* These functions are redirected to their old corresponding functions */
-	#define class_create(module, name) class_simple_create(module, name)
-	#define class_destroy(type) class_simple_destroy(type)
-	#define class_device_destroy(unused, devno) class_simple_device_remove(devno)
-	#define class_device_create(type, unused, devno, devpointer, nameformat, minor, unused) \
-		class_simple_device_add(type, devno, devpointer, nameformat, minor)
-	#define class_set_devdata(classdev, privdata) classdev->class_data = privdata
-	#define DEVICE_ATTR_COMPAT
-	#define sysfs_attr_def_name(name) class_device_attr_##name
-	#define sysfs_attr_def_pointer privdata->class_dev
-	#define SYSFS_GET_FUNCTION(name) ssize_t name(struct class_device *cls, char *buf)
-	#define SYSFS_SET_FUNCTION(name) ssize_t name(struct class_device *cls, const char *buf, size_t count)
-	#define SYSFS_GET_PRIVDATA (pcidriver_privdata_t*)cls->class_data
-
-#else
-
-/* In 2.6.26, device.h was changed quite significantly. Luckily, it only affected
-   type/function names, for the most part. */
-//#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
-	#define class_device_attribute device_attribute
-	#define CLASS_DEVICE_ATTR DEVICE_ATTR
-	#define class_device device
-	#define class_data dev
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
-	#define class_device_create(type, parent, devno, devpointer, nameformat, minor, privdata) \
-		device_create(type, parent, devno, privdata, nameformat, minor)
-#else
-	#define class_device_create(type, parent, devno, devpointer, nameformat, minor, unused) \
-		device_create(type, parent, devno, nameformat, minor)
+/* VM_RESERVED is removed in 3.7-rc1 */
+#ifndef VM_RESERVED
+# define  VM_RESERVED   (VM_DONTEXPAND | VM_DONTDUMP)
 #endif
-	#define class_device_create_file device_create_file
-	#define class_device_remove_file device_remove_file
-	#define class_device_destroy device_destroy
-	#define DEVICE_ATTR_COMPAT struct device_attribute *attr,
-	#define class_set_devdata dev_set_drvdata
-
-	#define sysfs_attr_def_name(name) dev_attr_##name
-	#define sysfs_attr_def_pointer privdata->class_dev
-	#define SYSFS_GET_FUNCTION(name) ssize_t name(struct device *dev, struct device_attribute *attr, char *buf)
-	#define SYSFS_SET_FUNCTION(name) ssize_t name(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-	#define SYSFS_GET_PRIVDATA dev_get_drvdata(dev)
-
-//#endif
 
-#define class_compat class
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
+# define __devinit
+# define __devexit
+# define __devinitdata
 #endif
 
-/* The arguments of IRQ handlers have been changed in 2.6.19. It's very likely that
-   int irq will disappear somewhen in the future (current is 2.6.29), too. */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
-	#define IRQ_HANDLER_FUNC(name) irqreturn_t name(int irq, void *dev_id)
-#else
-	#define IRQ_HANDLER_FUNC(name) irqreturn_t name(int irq, void *dev_id, struct pt_regs *regs)
-#endif
+#define compat_lock_page __set_page_locked
+#define compat_unlock_page __clear_page_locked
 
-/* atomic_inc_return appeared in 2.6.9, at least in CERN scientific linux, provide
-   compatibility wrapper for older kernels */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
-static int atomic_inc_return(atomic_t *variable) {
-	atomic_inc(variable);
-	return atomic_read(variable);
-}
-#endif
 
-/* sg_set_page is available starting at 2.6.24 */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
+#define class_device_attribute device_attribute
+#define CLASS_DEVICE_ATTR DEVICE_ATTR
+#define class_device device
+#define class_data dev
+#define class_device_create(type, parent, devno, devpointer, nameformat, minor, privdata) \
+		device_create(type, parent, devno, privdata, nameformat, minor)
+#define class_device_create_file device_create_file
+#define class_device_remove_file device_remove_file
+#define class_device_destroy device_destroy
+#define DEVICE_ATTR_COMPAT struct device_attribute *attr,
+#define class_set_devdata dev_set_drvdata
+
+#define sysfs_attr_def_name(name) dev_attr_##name
+#define sysfs_attr_def_pointer privdata->class_dev
+#define SYSFS_GET_FUNCTION(name) ssize_t name(struct device *dev, struct device_attribute *attr, char *buf)
+#define SYSFS_SET_FUNCTION(name) ssize_t name(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+#define SYSFS_GET_PRIVDATA dev_get_drvdata(dev)
 
-#define sg_set_page(sg, set_page, set_length, set_offset) do { \
-	(sg)->page = set_page; \
-	(sg)->length = set_length; \
-	(sg)->offset = set_offset; \
-} while (0)
+#define class_compat class
 
-#endif
 
-/* Before 2.6.20, disable was not an atomic counter, so this check was needed */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
-#define pci_disable_device(pdev) do { \
-	if (pdev->is_enabled) \
-		pci_disable_device(pdev); \
-} while (0)
-#endif
+#define IRQ_HANDLER_FUNC(name) irqreturn_t name(int irq, void *dev_id)
 
-/* Before 2.6.24, scatter/gather lists did not need to be initialized */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
-	#define sg_init_table(sg, nr_pages)
-#endif
+#define request_irq(irq, irq_handler, modname, privdata) request_irq(irq, irq_handler, IRQF_SHARED, modname, privdata)
 
-/* SA_SHIRQ was renamed to IRQF_SHARED in 2.6.24 */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
-	#define request_irq(irq, irq_handler, modname, privdata) request_irq(irq, irq_handler, IRQF_SHARED, modname, privdata)
-#else
-	#define request_irq(irq, irq_handler, modname, privdata) request_irq(irq, irq_handler, SA_SHIRQ, modname, privdata)
-#endif
 
-/* In 2.6.13, io_remap_page_range was removed in favor for io_remap_pfn_range which works on
-   more platforms and allows more memory space */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
 #define io_remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \
 	io_remap_pfn_range(vmap, vm_start, (bar_addr >> PAGE_SHIFT), bar_length, vm_page_prot)
-#else
-#define io_remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \
-	io_remap_page_range(vmap, vm_start, bar_addr, bar_length, vm_page_prot)
-#endif
 
-/* In 2.6.10, remap_pfn_range was introduced, see io_remap_pfn_range_compat */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10)
 #define remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \
 	remap_pfn_range(vmap, vm_start, (bar_addr >> PAGE_SHIFT), bar_length, vm_page_prot)
 
 #define remap_pfn_range_cpua_compat(vmap, vm_start, cpua, size, vm_page_prot) \
 	remap_pfn_range(vmap, vm_start, page_to_pfn(virt_to_page((void*)cpua)), size, vm_page_prot)
 
-#else
-#define remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \
-	remap_page_range(vmap, vm_start, bar_addr, bar_length, vm_page_prot)
-
-#define remap_pfn_range_cpua_compat(vmap, vm_start, cpua, size, vm_page_prot) \
-	remap_page_range(vmap, vm_start, virt_to_phys((void*)cpua), size, vm_page_prot)
-#endif
-
-/**
- * Go over the pages of the kmem buffer, and mark them as reserved.
- * This is needed, otherwise mmaping the kernel memory to user space
- * will fail silently (mmaping /dev/null) when using remap_xx_range.
- */
-static inline void set_pages_reserved_compat(unsigned long cpua, unsigned long size)
-{
-	/* Starting in 2.6.15, the PG_RESERVED bit was removed.
-	   See also http://lwn.net/Articles/161204/ */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
-	struct page *page, *last_page;
-
-	page = virt_to_page(cpua);
-	last_page = virt_to_page(cpua + size - 1);
-
-	for (; page <= last_page; page++)
-               SetPageReserved(page);
-#endif
-}
 
 int pcidriver_pcie_get_mps(struct pci_dev *dev);
 int pcidriver_pcie_set_mps(struct pci_dev *dev, int mps);
diff --git a/driver/int.c b/driver/int.c
index 5dbcb7f..f78c6ec 100644
--- a/driver/int.c
+++ b/driver/int.c
@@ -9,7 +9,7 @@
 
 /*
  * Change History:
- * 
+ *
  * $Log: not supported by cvs2svn $
  * Revision 1.7  2008-01-11 10:18:28  marcus
  * Modified interrupt mechanism. Added atomic functions and queues, to address race conditions. Removed unused interrupt code.
@@ -60,7 +60,7 @@
 
 /*
  * The ID between IRQ_SOURCE in irq_outstanding and the actual source is arbitrary.
- * Therefore, be careful when communicating with multiple implementations. 
+ * Therefore, be careful when communicating with multiple implementations.
  */
 
 /* IRQ_SOURCES */
@@ -92,90 +92,90 @@
  */
 int pcidriver_probe_irq(pcidriver_privdata_t *privdata)
 {
-	unsigned char int_pin, int_line;
-	unsigned long bar_addr, bar_len, bar_flags;
-	int i;
-	int err;
-
-	for (i = 0; i < 6; i++)
-		privdata->bars_kmapped[i] = NULL;
-
-	for (i = 0; i < 6; i++) {
-		bar_addr = pci_resource_start(privdata->pdev, i);
-		bar_len = pci_resource_len(privdata->pdev, i);
-		bar_flags = pci_resource_flags(privdata->pdev, i);
-
-		/* check if it is a valid BAR, skip if not */
-		if ((bar_addr == 0) || (bar_len == 0))
-			continue;
-
-		/* Skip IO regions (map only mem regions) */
-		if (bar_flags & IORESOURCE_IO)
-			continue;
-
-		/* Check if the region is available */
-		if ((err = pci_request_region(privdata->pdev, i, NULL)) != 0) {
-			mod_info( "Failed to request BAR memory region.\n" );
-			return err;
-		}
-
-		/* Map it into kernel space. */
-		/* For x86 this is just a dereference of the pointer, but that is
-		 * not portable. So we need to do the portable way. Thanks Joern!
-		 */
-
-		/* respect the cacheable-bility of the region */
-		if (bar_flags & IORESOURCE_PREFETCH)
-			privdata->bars_kmapped[i] = ioremap(bar_addr, bar_len);
-		else
-			privdata->bars_kmapped[i] = ioremap_nocache(bar_addr, bar_len);
-
-		/* check for error */
-		if (privdata->bars_kmapped[i] == NULL) {
-			mod_info( "Failed to remap BAR%d into kernel space.\n", i );
-			return -EIO;
-		}
-	}
-
-	/* Initialize the interrupt handler for this device */
-	/* Initialize the wait queues */
-	for (i = 0; i < PCIDRIVER_INT_MAXSOURCES; i++) {
-		init_waitqueue_head(&(privdata->irq_queues[i]));
-		atomic_set(&(privdata->irq_outstanding[i]), 0);
-	}
-
-	/* Initialize the irq config */
-	if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_PIN, &int_pin)) != 0) {
-		/* continue without interrupts */
-		int_pin = 0;
-		mod_info("Error getting the interrupt pin. Disabling interrupts for this device\n");
-	}
-
-	/* Disable interrupts and activate them if everything can be set up properly */
-	privdata->irq_enabled = 0;
-
-	if (int_pin == 0)
-		return 0;
-
-	if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_LINE, &int_line)) != 0) {
-		mod_info("Error getting the interrupt line. Disabling interrupts for this device\n");
-		return 0;
-	}
-
-	/* Enable interrupts using MSI mode */
-	if (!pci_enable_msi(privdata->pdev)) 
-		privdata->msi_mode = 1;
-	
-	/* register interrupt handler */
-	if ((err = request_irq(privdata->pdev->irq, pcidriver_irq_handler, MODNAME, privdata)) != 0) {
-		mod_info("Error registering the interrupt handler. Disabling interrupts for this device\n");
-		return 0;
-	}
-
-	privdata->irq_enabled = 1;
-	mod_info("Registered Interrupt Handler at pin %i, line %i, IRQ %i\n", int_pin, int_line, privdata->pdev->irq );
-
-	return 0;
+    unsigned char int_pin, int_line;
+    unsigned long bar_addr, bar_len, bar_flags;
+    int i;
+    int err;
+
+    for (i = 0; i < 6; i++)
+        privdata->bars_kmapped[i] = NULL;
+
+    for (i = 0; i < 6; i++) {
+        bar_addr = pci_resource_start(privdata->pdev, i);
+        bar_len = pci_resource_len(privdata->pdev, i);
+        bar_flags = pci_resource_flags(privdata->pdev, i);
+
+        /* check if it is a valid BAR, skip if not */
+        if ((bar_addr == 0) || (bar_len == 0))
+            continue;
+
+        /* Skip IO regions (map only mem regions) */
+        if (bar_flags & IORESOURCE_IO)
+            continue;
+
+        /* Check if the region is available */
+        if ((err = pci_request_region(privdata->pdev, i, NULL)) != 0) {
+            mod_info( "Failed to request BAR memory region.\n" );
+            return err;
+        }
+
+        /* Map it into kernel space. */
+        /* For x86 this is just a dereference of the pointer, but that is
+         * not portable. So we need to do the portable way. Thanks Joern!
+         */
+
+        /* respect the cacheable-bility of the region */
+        if (bar_flags & IORESOURCE_PREFETCH)
+            privdata->bars_kmapped[i] = ioremap(bar_addr, bar_len);
+        else
+            privdata->bars_kmapped[i] = ioremap_nocache(bar_addr, bar_len);
+
+        /* check for error */
+        if (privdata->bars_kmapped[i] == NULL) {
+            mod_info( "Failed to remap BAR%d into kernel space.\n", i );
+            return -EIO;
+        }
+    }
+
+    /* Initialize the interrupt handler for this device */
+    /* Initialize the wait queues */
+    for (i = 0; i < PCIDRIVER_INT_MAXSOURCES; i++) {
+        init_waitqueue_head(&(privdata->irq_queues[i]));
+        atomic_set(&(privdata->irq_outstanding[i]), 0);
+    }
+
+    /* Initialize the irq config */
+    if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_PIN, &int_pin)) != 0) {
+        /* continue without interrupts */
+        int_pin = 0;
+        mod_info("Error getting the interrupt pin. Disabling interrupts for this device\n");
+    }
+
+    /* Disable interrupts and activate them if everything can be set up properly */
+    privdata->irq_enabled = 0;
+
+    if (int_pin == 0)
+        return 0;
+
+    if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_LINE, &int_line)) != 0) {
+        mod_info("Error getting the interrupt line. Disabling interrupts for this device\n");
+        return 0;
+    }
+
+    /* Enable interrupts using MSI mode */
+    if (!pci_enable_msi(privdata->pdev))
+        privdata->msi_mode = 1;
+
+    /* register interrupt handler */
+    if ((err = request_irq(privdata->pdev->irq, pcidriver_irq_handler, MODNAME, privdata)) != 0) {
+        mod_info("Error registering the interrupt handler. Disabling interrupts for this device\n");
+        return 0;
+    }
+
+    privdata->irq_enabled = 1;
+    mod_info("Registered Interrupt Handler at pin %i, line %i, IRQ %i\n", int_pin, int_line, privdata->pdev->irq );
+
+    return 0;
 }
 
 /**
@@ -185,16 +185,16 @@ int pcidriver_probe_irq(pcidriver_privdata_t *privdata)
  */
 void pcidriver_remove_irq(pcidriver_privdata_t *privdata)
 {
-	/* Release the IRQ handler */
-	if (privdata->irq_enabled != 0)
-		free_irq(privdata->pdev->irq, privdata);
-	
-	if (privdata->msi_mode) {
-		pci_disable_msi(privdata->pdev);
-		privdata->msi_mode = 0;
-	}
-
-	pcidriver_irq_unmap_bars(privdata);
+    /* Release the IRQ handler */
+    if (privdata->irq_enabled != 0)
+        free_irq(privdata->pdev->irq, privdata);
+
+    if (privdata->msi_mode) {
+        pci_disable_msi(privdata->pdev);
+        privdata->msi_mode = 0;
+    }
+
+    pcidriver_irq_unmap_bars(privdata);
 }
 
 /**
@@ -204,15 +204,15 @@ void pcidriver_remove_irq(pcidriver_privdata_t *privdata)
  */
 void pcidriver_irq_unmap_bars(pcidriver_privdata_t *privdata)
 {
-	int i;
+    int i;
 
-	for (i = 0; i < 6; i++) {
-		if (privdata->bars_kmapped[i] == NULL)
-			continue;
+    for (i = 0; i < 6; i++) {
+        if (privdata->bars_kmapped[i] == NULL)
+            continue;
 
-		iounmap((void*)privdata->bars_kmapped[i]);
-		pci_release_region(privdata->pdev, i);
-	}
+        iounmap((void*)privdata->bars_kmapped[i]);
+        pci_release_region(privdata->pdev, i);
+    }
 }
 
 /**
@@ -227,15 +227,15 @@ void pcidriver_irq_unmap_bars(pcidriver_privdata_t *privdata)
  */
 static bool pcidriver_irq_acknowledge(pcidriver_privdata_t *privdata)
 {
-	int channel = 0;
+    int channel = 0;
 //	volatile unsigned int *bar;
 //	bar = privdata->bars_kmapped[0];
 //	mod_info_dbg("interrupt registers. ISR: %x, IER: %x\n", bar[ABB_INT_STAT], bar[ABB_INT_ENABLE]);
 
-	atomic_inc(&(privdata->irq_outstanding[channel]));
-	wake_up_interruptible(&(privdata->irq_queues[channel]));
-	
-	return true;
+    atomic_inc(&(privdata->irq_outstanding[channel]));
+    wake_up_interruptible(&(privdata->irq_queues[channel]));
+
+    return true;
 }
 
 /**
@@ -248,11 +248,11 @@ static bool pcidriver_irq_acknowledge(pcidriver_privdata_t *privdata)
  */
 IRQ_HANDLER_FUNC(pcidriver_irq_handler)
 {
-	pcidriver_privdata_t *privdata = (pcidriver_privdata_t *)dev_id;
+    pcidriver_privdata_t *privdata = (pcidriver_privdata_t *)dev_id;
 
-	if (!pcidriver_irq_acknowledge(privdata))
-		return IRQ_NONE;
+    if (!pcidriver_irq_acknowledge(privdata))
+        return IRQ_NONE;
 
-	privdata->irq_count++;
-	return IRQ_HANDLED;
+    privdata->irq_count++;
+    return IRQ_HANDLED;
 }
diff --git a/driver/ioctl.c b/driver/ioctl.c
index f957561..4fef5f9 100644
--- a/driver/ioctl.c
+++ b/driver/ioctl.c
@@ -60,13 +60,13 @@
  */
 static int ioctl_mmap_mode(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	if ((arg != PCIDRIVER_MMAP_PCI) && (arg != PCIDRIVER_MMAP_KMEM))
-		return -EINVAL;
+    if ((arg != PCIDRIVER_MMAP_PCI) && (arg != PCIDRIVER_MMAP_KMEM))
+        return -EINVAL;
 
-	/* change the mode */
-	privdata->mmap_mode = arg;
+    /* change the mode */
+    privdata->mmap_mode = arg;
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -76,14 +76,14 @@ static int ioctl_mmap_mode(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_mmap_area(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	/* validate input */
-	if ((arg < PCIDRIVER_BAR0) || (arg > PCIDRIVER_BAR5))
-		return -EINVAL;
+    /* validate input */
+    if ((arg < PCIDRIVER_BAR0) || (arg > PCIDRIVER_BAR5))
+        return -EINVAL;
 
-	/* change the PCI area to mmap */
-	privdata->mmap_area = arg;
+    /* change the PCI area to mmap */
+    privdata->mmap_area = arg;
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -97,45 +97,45 @@ static int ioctl_mmap_area(pcidriver_privdata_t *privdata, unsigned long arg)
 static int ioctl_pci_config_read_write(pcidriver_privdata_t *privdata, unsigned int cmd, unsigned long arg)
 {
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	return -ENXIO;
+    return -ENXIO;
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	int ret;
-	READ_FROM_USER(pci_cfg_cmd, pci_cmd);
-
-	if (cmd == PCIDRIVER_IOC_PCI_CFG_RD) {
-		switch (pci_cmd.size) {
-			case PCIDRIVER_PCI_CFG_SZ_BYTE:
-				ret = pci_read_config_byte( privdata->pdev, pci_cmd.addr, &(pci_cmd.val.byte) );
-				break;
-			case PCIDRIVER_PCI_CFG_SZ_WORD:
-				ret = pci_read_config_word( privdata->pdev, pci_cmd.addr, &(pci_cmd.val.word) );
-				break;
-			case PCIDRIVER_PCI_CFG_SZ_DWORD:
-				ret = pci_read_config_dword( privdata->pdev, pci_cmd.addr, &(pci_cmd.val.dword) );
-				break;
-			default:
-				return -EINVAL;		/* Wrong size setting */
-		}
-	} else {
-		switch (pci_cmd.size) {
-			case PCIDRIVER_PCI_CFG_SZ_BYTE:
-				ret = pci_write_config_byte( privdata->pdev, pci_cmd.addr, pci_cmd.val.byte );
-				break;
-			case PCIDRIVER_PCI_CFG_SZ_WORD:
-				ret = pci_write_config_word( privdata->pdev, pci_cmd.addr, pci_cmd.val.word );
-				break;
-			case PCIDRIVER_PCI_CFG_SZ_DWORD:
-				ret = pci_write_config_dword( privdata->pdev, pci_cmd.addr, pci_cmd.val.dword );
-				break;
-			default:
-				return -EINVAL;		/* Wrong size setting */
-				break;
-		}
-	}
-
-	WRITE_TO_USER(pci_cfg_cmd, pci_cmd);
-
-	return 0;
+    int ret;
+    READ_FROM_USER(pci_cfg_cmd, pci_cmd);
+
+    if (cmd == PCIDRIVER_IOC_PCI_CFG_RD) {
+        switch (pci_cmd.size) {
+        case PCIDRIVER_PCI_CFG_SZ_BYTE:
+            ret = pci_read_config_byte( privdata->pdev, pci_cmd.addr, &(pci_cmd.val.byte) );
+            break;
+        case PCIDRIVER_PCI_CFG_SZ_WORD:
+            ret = pci_read_config_word( privdata->pdev, pci_cmd.addr, &(pci_cmd.val.word) );
+            break;
+        case PCIDRIVER_PCI_CFG_SZ_DWORD:
+            ret = pci_read_config_dword( privdata->pdev, pci_cmd.addr, &(pci_cmd.val.dword) );
+            break;
+        default:
+            return -EINVAL;		/* Wrong size setting */
+        }
+    } else {
+        switch (pci_cmd.size) {
+        case PCIDRIVER_PCI_CFG_SZ_BYTE:
+            ret = pci_write_config_byte( privdata->pdev, pci_cmd.addr, pci_cmd.val.byte );
+            break;
+        case PCIDRIVER_PCI_CFG_SZ_WORD:
+            ret = pci_write_config_word( privdata->pdev, pci_cmd.addr, pci_cmd.val.word );
+            break;
+        case PCIDRIVER_PCI_CFG_SZ_DWORD:
+            ret = pci_write_config_dword( privdata->pdev, pci_cmd.addr, pci_cmd.val.dword );
+            break;
+        default:
+            return -EINVAL;		/* Wrong size setting */
+            break;
+        }
+    }
+
+    WRITE_TO_USER(pci_cfg_cmd, pci_cmd);
+
+    return 0;
 #endif /* PCIDRIVER_DUMMY_DEVICE */
 }
 
@@ -148,40 +148,40 @@ static int ioctl_pci_config_read_write(pcidriver_privdata_t *privdata, unsigned
  */
 static int ioctl_pci_info(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int ret;
+    int ret;
 
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	READ_FROM_USER(pcilib_board_info_t, pci_info);
-	memset(&pci_info, 0, sizeof(pci_info));
-	WRITE_TO_USER(pcilib_board_info_t, pci_info);
+    READ_FROM_USER(pcilib_board_info_t, pci_info);
+    memset(&pci_info, 0, sizeof(pci_info));
+    WRITE_TO_USER(pcilib_board_info_t, pci_info);
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	int bar;
+    int bar;
 
-	READ_FROM_USER(pcilib_board_info_t, pci_info);
+    READ_FROM_USER(pcilib_board_info_t, pci_info);
 
-	pci_info.vendor_id = privdata->pdev->vendor;
-	pci_info.device_id = privdata->pdev->device;
-	pci_info.bus = privdata->pdev->bus->number;
-	pci_info.slot = PCI_SLOT(privdata->pdev->devfn);
-	pci_info.devfn = privdata->pdev->devfn;
-	pci_info.func = PCI_FUNC(privdata->pdev->devfn);
+    pci_info.vendor_id = privdata->pdev->vendor;
+    pci_info.device_id = privdata->pdev->device;
+    pci_info.bus = privdata->pdev->bus->number;
+    pci_info.slot = PCI_SLOT(privdata->pdev->devfn);
+    pci_info.devfn = privdata->pdev->devfn;
+    pci_info.func = PCI_FUNC(privdata->pdev->devfn);
 
-	if ((ret = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_PIN, &(pci_info.interrupt_pin))) != 0)
-		return ret;
+    if ((ret = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_PIN, &(pci_info.interrupt_pin))) != 0)
+        return ret;
 
-	if ((ret = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_LINE, &(pci_info.interrupt_line))) != 0)
-		return ret;
+    if ((ret = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_LINE, &(pci_info.interrupt_line))) != 0)
+        return ret;
 
-	for (bar = 0; bar < 6; bar++) {
-		pci_info.bar_start[bar] = pci_resource_start(privdata->pdev, bar);
-		pci_info.bar_length[bar] = pci_resource_len(privdata->pdev, bar);
-		pci_info.bar_flags[bar] = pci_resource_flags(privdata->pdev, bar);
-	}
+    for (bar = 0; bar < 6; bar++) {
+        pci_info.bar_start[bar] = pci_resource_start(privdata->pdev, bar);
+        pci_info.bar_length[bar] = pci_resource_len(privdata->pdev, bar);
+        pci_info.bar_flags[bar] = pci_resource_flags(privdata->pdev, bar);
+    }
 
-	WRITE_TO_USER(pcilib_board_info_t, pci_info);
+    WRITE_TO_USER(pcilib_board_info_t, pci_info);
 #endif /* PCIDRIVER_DUMMY_DEVICE */
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -193,13 +193,13 @@ static int ioctl_pci_info(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_kmem_alloc(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int err, ret;
+    int err, ret;
 
-	READ_FROM_USER(kmem_handle_t, khandle);
-	err = pcidriver_kmem_alloc(privdata, &khandle);
-	WRITE_TO_USER(kmem_handle_t, khandle);
+    READ_FROM_USER(kmem_handle_t, khandle);
+    err = pcidriver_kmem_alloc(privdata, &khandle);
+    WRITE_TO_USER(kmem_handle_t, khandle);
 
-	return err;
+    return err;
 }
 
 /**
@@ -211,13 +211,13 @@ static int ioctl_kmem_alloc(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_kmem_free(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int ret;
-	READ_FROM_USER(kmem_handle_t, khandle);
+    int ret;
+    READ_FROM_USER(kmem_handle_t, khandle);
 
-	if ((ret = pcidriver_kmem_free(privdata, &khandle)) != 0)
-		return ret;
+    if ((ret = pcidriver_kmem_free(privdata, &khandle)) != 0)
+        return ret;
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -229,15 +229,15 @@ static int ioctl_kmem_free(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_kmem_sync(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int ret;
-	READ_FROM_USER(kmem_sync_t, ksync);
-
-	if ((ret =  pcidriver_kmem_sync(privdata, &ksync)) != 0)
-	    return ret;
-	
-	WRITE_TO_USER(kmem_sync_t, ksync);
-	
-	return 0;
+    int ret;
+    READ_FROM_USER(kmem_sync_t, ksync);
+
+    if ((ret =  pcidriver_kmem_sync(privdata, &ksync)) != 0)
+        return ret;
+
+    WRITE_TO_USER(kmem_sync_t, ksync);
+
+    return 0;
 }
 
 /*
@@ -249,15 +249,15 @@ static int ioctl_kmem_sync(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_umem_sgmap(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int ret;
-	READ_FROM_USER(umem_handle_t, uhandle);
+    int ret;
+    READ_FROM_USER(umem_handle_t, uhandle);
 
-	if ((ret = pcidriver_umem_sgmap(privdata, &uhandle)) != 0)
-		return ret;
+    if ((ret = pcidriver_umem_sgmap(privdata, &uhandle)) != 0)
+        return ret;
 
-	WRITE_TO_USER(umem_handle_t, uhandle);
+    WRITE_TO_USER(umem_handle_t, uhandle);
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -269,19 +269,19 @@ static int ioctl_umem_sgmap(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_umem_sgunmap(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int ret;
-	pcidriver_umem_entry_t *umem_entry;
-	READ_FROM_USER(umem_handle_t, uhandle);
+    int ret;
+    pcidriver_umem_entry_t *umem_entry;
+    READ_FROM_USER(umem_handle_t, uhandle);
 
-	/* Find the associated umem_entry for this buffer,
-	 * return -EINVAL if the specified handle id is invalid */
-	if ((umem_entry = pcidriver_umem_find_entry_id(privdata, uhandle.handle_id)) == NULL)
-		return -EINVAL;
+    /* Find the associated umem_entry for this buffer,
+     * return -EINVAL if the specified handle id is invalid */
+    if ((umem_entry = pcidriver_umem_find_entry_id(privdata, uhandle.handle_id)) == NULL)
+        return -EINVAL;
 
-	if ((ret = pcidriver_umem_sgunmap(privdata, umem_entry)) != 0)
-		return ret;
+    if ((ret = pcidriver_umem_sgunmap(privdata, umem_entry)) != 0)
+        return ret;
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -293,35 +293,35 @@ static int ioctl_umem_sgunmap(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_umem_sgget(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int ret;
-	READ_FROM_USER(umem_sglist_t, usglist);
+    int ret;
+    READ_FROM_USER(umem_sglist_t, usglist);
 
-	/* The umem_sglist_t has a pointer to the scatter/gather list itself which
-	 * needs to be copied separately. The number of elements is stored in ->nents.
-	 * As the list can get very big, we need to use vmalloc. */
-	if ((usglist.sg = vmalloc(usglist.nents * sizeof(umem_sgentry_t))) == NULL)
-		return -ENOMEM;
+    /* The umem_sglist_t has a pointer to the scatter/gather list itself which
+     * needs to be copied separately. The number of elements is stored in ->nents.
+     * As the list can get very big, we need to use vmalloc. */
+    if ((usglist.sg = vmalloc(usglist.nents * sizeof(umem_sgentry_t))) == NULL)
+        return -ENOMEM;
 
-	/* copy array to kernel structure */
-	ret = copy_from_user(usglist.sg, ((umem_sglist_t *)arg)->sg, (usglist.nents)*sizeof(umem_sgentry_t));
-	if (ret) return -EFAULT;
+    /* copy array to kernel structure */
+    ret = copy_from_user(usglist.sg, ((umem_sglist_t *)arg)->sg, (usglist.nents)*sizeof(umem_sgentry_t));
+    if (ret) return -EFAULT;
 
-	if ((ret = pcidriver_umem_sgget(privdata, &usglist)) != 0)
-		return ret;
+    if ((ret = pcidriver_umem_sgget(privdata, &usglist)) != 0)
+        return ret;
 
-	/* write data to user space */
-	ret = copy_to_user(((umem_sglist_t *)arg)->sg, usglist.sg, (usglist.nents)*sizeof(umem_sgentry_t));
-	if (ret) return -EFAULT;
+    /* write data to user space */
+    ret = copy_to_user(((umem_sglist_t *)arg)->sg, usglist.sg, (usglist.nents)*sizeof(umem_sgentry_t));
+    if (ret) return -EFAULT;
 
-	/* free array memory */
-	vfree(usglist.sg);
+    /* free array memory */
+    vfree(usglist.sg);
 
-	/* restore sg pointer to vma address in user space before copying */
-	usglist.sg = ((umem_sglist_t *)arg)->sg;
+    /* restore sg pointer to vma address in user space before copying */
+    usglist.sg = ((umem_sglist_t *)arg)->sg;
 
-	WRITE_TO_USER(umem_sglist_t, usglist);
+    WRITE_TO_USER(umem_sglist_t, usglist);
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -333,10 +333,10 @@ static int ioctl_umem_sgget(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_umem_sync(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int ret;
-	READ_FROM_USER(umem_handle_t, uhandle);
+    int ret;
+    READ_FROM_USER(umem_handle_t, uhandle);
 
-	return pcidriver_umem_sync( privdata, &uhandle );
+    return pcidriver_umem_sync( privdata, &uhandle );
 }
 
 /**
@@ -349,47 +349,47 @@ static int ioctl_umem_sync(pcidriver_privdata_t *privdata, unsigned long arg)
 static int ioctl_wait_interrupt(pcidriver_privdata_t *privdata, unsigned long arg)
 {
 #ifdef ENABLE_IRQ
-	int ret;
-	unsigned long timeout;
-	unsigned int irq_source;
-	unsigned long temp = 0;
+    int ret;
+    unsigned long timeout;
+    unsigned int irq_source;
+    unsigned long temp = 0;
 
-	READ_FROM_USER(interrupt_wait_t, irq_handle);
+    READ_FROM_USER(interrupt_wait_t, irq_handle);
 
-	irq_source = irq_handle.source;
+    irq_source = irq_handle.source;
 
-	if (irq_source >= PCIDRIVER_INT_MAXSOURCES)
-		return -EFAULT;						/* User tried to overrun the IRQ_SOURCES array */
+    if (irq_source >= PCIDRIVER_INT_MAXSOURCES)
+        return -EFAULT;						/* User tried to overrun the IRQ_SOURCES array */
 
-	timeout = jiffies + (irq_handle.timeout * HZ / 1000000);
+    timeout = jiffies + (irq_handle.timeout * HZ / 1000000);
 
-	/* Thanks to Joern for the correction and tips! */
-	/* done this way to avoid wrong behaviour (endless loop) of the compiler in AMD platforms */
-	do {
-		/* We wait here with an interruptible timeout. This will be interrupted
+    /* Thanks to Joern for the correction and tips! */
+    /* done this way to avoid wrong behaviour (endless loop) of the compiler in AMD platforms */
+    do {
+        /* We wait here with an interruptible timeout. This will be interrupted
                  * by int.c:check_acknowledge_channel() as soon as in interrupt for
                  * the specified source arrives. */
-		wait_event_interruptible_timeout( (privdata->irq_queues[irq_source]), (atomic_read(&(privdata->irq_outstanding[irq_source])) > 0), (10*HZ/1000) );
-
-		if (atomic_add_negative( -1, &(privdata->irq_outstanding[irq_source])) )
-			atomic_inc( &(privdata->irq_outstanding[irq_source]) );
-		else
-			temp = 1;
-	} while ((!temp)&&(jiffies < timeout));
-	
-	if ((temp)&&(irq_handle.count)) {
-	    while (!atomic_add_negative( -1, &(privdata->irq_outstanding[irq_source]))) temp++;
-	    atomic_inc( &(privdata->irq_outstanding[irq_source]) );
-	}
-	
-	irq_handle.count = temp;
-
-	WRITE_TO_USER(interrupt_wait_t, irq_handle);
-
-	return 0;
+        wait_event_interruptible_timeout( (privdata->irq_queues[irq_source]), (atomic_read(&(privdata->irq_outstanding[irq_source])) > 0), (10*HZ/1000) );
+
+        if (atomic_add_negative( -1, &(privdata->irq_outstanding[irq_source])) )
+            atomic_inc( &(privdata->irq_outstanding[irq_source]) );
+        else
+            temp = 1;
+    } while ((!temp)&&(jiffies < timeout));
+
+    if ((temp)&&(irq_handle.count)) {
+        while (!atomic_add_negative( -1, &(privdata->irq_outstanding[irq_source]))) temp++;
+        atomic_inc( &(privdata->irq_outstanding[irq_source]) );
+    }
+
+    irq_handle.count = temp;
+
+    WRITE_TO_USER(interrupt_wait_t, irq_handle);
+
+    return 0;
 #else
-	mod_info("Asked to wait for interrupt but interrupts are not enabled in the driver\n");
-	return -EFAULT;
+    mod_info("Asked to wait for interrupt but interrupts are not enabled in the driver\n");
+    return -EFAULT;
 #endif
 }
 
@@ -404,18 +404,18 @@ static int ioctl_wait_interrupt(pcidriver_privdata_t *privdata, unsigned long ar
 static int ioctl_clear_ioq(pcidriver_privdata_t *privdata, unsigned long arg)
 {
 #ifdef ENABLE_IRQ
-	unsigned int irq_source;
+    unsigned int irq_source;
 
-	if (arg >= PCIDRIVER_INT_MAXSOURCES)
-		return -EFAULT;
+    if (arg >= PCIDRIVER_INT_MAXSOURCES)
+        return -EFAULT;
 
-	irq_source = arg;
-	atomic_set(&(privdata->irq_outstanding[irq_source]), 0);
+    irq_source = arg;
+    atomic_set(&(privdata->irq_outstanding[irq_source]), 0);
 
-	return 0;
+    return 0;
 #else
-	mod_info("Asked to wait for interrupt but interrupts are not enabled in the driver\n");
-	return -EFAULT;
+    mod_info("Asked to wait for interrupt but interrupts are not enabled in the driver\n");
+    return -EFAULT;
 #endif
 }
 
@@ -429,18 +429,18 @@ static int ioctl_clear_ioq(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_version(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int ret;
-	pcilib_driver_version_t info;
+    int ret;
+    pcilib_driver_version_t info;
 
-	info = (pcilib_driver_version_t) {
-	    .version = PCILIB_VERSION,
-	    .interface = PCIDRIVER_INTERFACE_VERSION,
-	    .ioctls = PCIDRIVER_IOC_MAX + 1
-	};
+    info = (pcilib_driver_version_t) {
+        .version = PCILIB_VERSION,
+         .interface = PCIDRIVER_INTERFACE_VERSION,
+          .ioctls = PCIDRIVER_IOC_MAX + 1
+    };
 
-	WRITE_TO_USER(pcilib_driver_version_t, info);
+    WRITE_TO_USER(pcilib_driver_version_t, info);
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -452,24 +452,24 @@ static int ioctl_version(pcidriver_privdata_t *privdata, unsigned long arg)
  */
 static int ioctl_device_state(pcidriver_privdata_t *privdata, unsigned long arg)
 {
-	int ret;
-	pcilib_device_state_t info;
+    int ret;
+    pcilib_device_state_t info;
 
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	memset(&info, 0, sizeof(info));
+    memset(&info, 0, sizeof(info));
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	info = (pcilib_device_state_t) {
-	    .iommu = iommu_present(privdata->pdev->dev.bus),
-	    .mps = pcidriver_pcie_get_mps(privdata->pdev),
-	    .readrq = pcie_get_readrq(privdata->pdev),
-	    .dma_mask = privdata->pdev->dma_mask
-	};
+    info = (pcilib_device_state_t) {
+        .iommu = iommu_present(privdata->pdev->dev.bus),
+         .mps = pcidriver_pcie_get_mps(privdata->pdev),
+          .readrq = pcie_get_readrq(privdata->pdev),
+           .dma_mask = privdata->pdev->dma_mask
+    };
 #endif /* PCIDRIVER_DUMMY_DEVICE */
 
 
-	WRITE_TO_USER(pcilib_device_state_t, info);
+    WRITE_TO_USER(pcilib_device_state_t, info);
 
-	return 0;
+    return 0;
 }
 
 
@@ -483,19 +483,19 @@ static int ioctl_device_state(pcidriver_privdata_t *privdata, unsigned long arg)
 static int ioctl_set_dma_mask(pcidriver_privdata_t *privdata, unsigned long arg)
 {
 #ifndef PCIDRIVER_DUMMY_DEVICE
-	int err;
+    int err;
 
-	if ((arg < 24) || (arg > 64))
-		return -EINVAL;
+    if ((arg < 24) || (arg > 64))
+        return -EINVAL;
 
-	err = pci_set_dma_mask(privdata->pdev, DMA_BIT_MASK(arg));
-	if (err < 0) {
-	    printk(KERN_ERR "pci_set_dma_mask(%lu) failed\n", arg);
-	    return err;
-	}
+    err = pci_set_dma_mask(privdata->pdev, DMA_BIT_MASK(arg));
+    if (err < 0) {
+        printk(KERN_ERR "pci_set_dma_mask(%lu) failed\n", arg);
+        return err;
+    }
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
-	
-	return 0;
+
+    return 0;
 }
 
 /**
@@ -508,19 +508,19 @@ static int ioctl_set_dma_mask(pcidriver_privdata_t *privdata, unsigned long arg)
 static int ioctl_set_mps(pcidriver_privdata_t *privdata, unsigned long arg)
 {
 #ifndef PCIDRIVER_DUMMY_DEVICE
-	int err;
+    int err;
 
-	if ((arg != 128) && (arg != 256) && (arg != 512))
-		return -EINVAL;
+    if ((arg != 128) && (arg != 256) && (arg != 512))
+        return -EINVAL;
 
-	err = pcidriver_pcie_set_mps(privdata->pdev, arg);
-	if (err < 0) {
-	    printk(KERN_ERR "pcie_set_mps(%lu) failed\n", arg);
-	    return err;
-	}
+    err = pcidriver_pcie_set_mps(privdata->pdev, arg);
+    if (err < 0) {
+        printk(KERN_ERR "pcie_set_mps(%lu) failed\n", arg);
+        return err;
+    }
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
-	
-	return 0;
+
+    return 0;
 }
 
 
@@ -533,69 +533,65 @@ static int ioctl_set_mps(pcidriver_privdata_t *privdata, unsigned long arg)
  * @returns -EFAULT when an invalid memory pointer is passed
  *
  */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
-int pcidriver_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
-#else
 long pcidriver_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-#endif
 {
-	pcidriver_privdata_t *privdata = filp->private_data;
+    pcidriver_privdata_t *privdata = filp->private_data;
+
+    /* Select the appropiate command */
+    switch (cmd) {
+    case PCIDRIVER_IOC_MMAP_MODE:
+        return ioctl_mmap_mode(privdata, arg);
 
-	/* Select the appropiate command */
-	switch (cmd) {
-		case PCIDRIVER_IOC_MMAP_MODE:
-			return ioctl_mmap_mode(privdata, arg);
+    case PCIDRIVER_IOC_MMAP_AREA:
+        return ioctl_mmap_area(privdata, arg);
 
-		case PCIDRIVER_IOC_MMAP_AREA:
-			return ioctl_mmap_area(privdata, arg);
+    case PCIDRIVER_IOC_PCI_CFG_RD:
+    case PCIDRIVER_IOC_PCI_CFG_WR:
+        return ioctl_pci_config_read_write(privdata, cmd, arg);
 
-		case PCIDRIVER_IOC_PCI_CFG_RD:
-		case PCIDRIVER_IOC_PCI_CFG_WR:
-			return ioctl_pci_config_read_write(privdata, cmd, arg);
+    case PCIDRIVER_IOC_PCI_INFO:
+        return ioctl_pci_info(privdata, arg);
 
-		case PCIDRIVER_IOC_PCI_INFO:
-			return ioctl_pci_info(privdata, arg);
+    case PCIDRIVER_IOC_KMEM_ALLOC:
+        return ioctl_kmem_alloc(privdata, arg);
 
-		case PCIDRIVER_IOC_KMEM_ALLOC:
-			return ioctl_kmem_alloc(privdata, arg);
+    case PCIDRIVER_IOC_KMEM_FREE:
+        return ioctl_kmem_free(privdata, arg);
 
-		case PCIDRIVER_IOC_KMEM_FREE:
-			return ioctl_kmem_free(privdata, arg);
+    case PCIDRIVER_IOC_KMEM_SYNC:
+        return ioctl_kmem_sync(privdata, arg);
 
-		case PCIDRIVER_IOC_KMEM_SYNC:
-			return ioctl_kmem_sync(privdata, arg);
+    case PCIDRIVER_IOC_UMEM_SGMAP:
+        return ioctl_umem_sgmap(privdata, arg);
 
-		case PCIDRIVER_IOC_UMEM_SGMAP:
-			return ioctl_umem_sgmap(privdata, arg);
+    case PCIDRIVER_IOC_UMEM_SGUNMAP:
+        return ioctl_umem_sgunmap(privdata, arg);
 
-		case PCIDRIVER_IOC_UMEM_SGUNMAP:
-			return ioctl_umem_sgunmap(privdata, arg);
+    case PCIDRIVER_IOC_UMEM_SGGET:
+        return ioctl_umem_sgget(privdata, arg);
 
-		case PCIDRIVER_IOC_UMEM_SGGET:
-			return ioctl_umem_sgget(privdata, arg);
+    case PCIDRIVER_IOC_UMEM_SYNC:
+        return ioctl_umem_sync(privdata, arg);
 
-		case PCIDRIVER_IOC_UMEM_SYNC:
-			return ioctl_umem_sync(privdata, arg);
+    case PCIDRIVER_IOC_WAITI:
+        return ioctl_wait_interrupt(privdata, arg);
 
-		case PCIDRIVER_IOC_WAITI:
-			return ioctl_wait_interrupt(privdata, arg);
+    case PCIDRIVER_IOC_CLEAR_IOQ:
+        return ioctl_clear_ioq(privdata, arg);
 
-		case PCIDRIVER_IOC_CLEAR_IOQ:
-			return ioctl_clear_ioq(privdata, arg);
-		
-		case PCIDRIVER_IOC_VERSION:
-			return ioctl_version(privdata, arg);
+    case PCIDRIVER_IOC_VERSION:
+        return ioctl_version(privdata, arg);
 
-		case PCIDRIVER_IOC_DEVICE_STATE:
-			return ioctl_device_state(privdata, arg);
+    case PCIDRIVER_IOC_DEVICE_STATE:
+        return ioctl_device_state(privdata, arg);
 
-		case PCIDRIVER_IOC_DMA_MASK:
-			return ioctl_set_dma_mask(privdata, arg);
+    case PCIDRIVER_IOC_DMA_MASK:
+        return ioctl_set_dma_mask(privdata, arg);
 
-		case PCIDRIVER_IOC_MPS:
-			return ioctl_set_mps(privdata, arg);
+    case PCIDRIVER_IOC_MPS:
+        return ioctl_set_mps(privdata, arg);
 
-		default:
-			return -EINVAL;
-	}
+    default:
+        return -EINVAL;
+    }
 }
diff --git a/driver/ioctl.h b/driver/ioctl.h
index 696fb8b..e989f95 100644
--- a/driver/ioctl.h
+++ b/driver/ioctl.h
@@ -1,5 +1 @@
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
-int pcidriver_ioctl(struct inode  *inode, struct file *filp, unsigned int cmd, unsigned long arg);
-#else
 long pcidriver_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
-#endif
diff --git a/driver/kmem.c b/driver/kmem.c
index 9bc1eb7..e3b0a97 100644
--- a/driver/kmem.c
+++ b/driver/kmem.c
@@ -24,10 +24,6 @@
 #include "kmem.h"			/* prototypes for kernel memory */
 #include "sysfs.h"			/* prototypes for sysfs */
 
-/* VM_RESERVED is removed in 3.7-rc1 */
-#ifndef VM_RESERVED
-# define  VM_RESERVED   (VM_DONTEXPAND | VM_DONTDUMP)
-#endif
 
 /**
  *
@@ -37,270 +33,268 @@
  */
 int pcidriver_kmem_alloc(pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle)
 {
-	int flags;
-	pcidriver_kmem_entry_t *kmem_entry;
-	void *retptr;
-
-	if (kmem_handle->flags&KMEM_FLAG_REUSE) {
-	    kmem_entry = pcidriver_kmem_find_entry_use(privdata, kmem_handle->use, kmem_handle->item);
-	    if (kmem_entry) {
-		unsigned long flags = kmem_handle->flags;
-		
-		if (flags&KMEM_FLAG_TRY) {
-		    kmem_handle->type = kmem_entry->type;
-		    kmem_handle->size = kmem_entry->size;
-		    kmem_handle->align = kmem_entry->align;
-		} else {
-		    if (kmem_handle->type != kmem_entry->type) {
-		    	mod_info("Invalid type of reusable kmem_entry, currently: %lu, but requested: %lu\n", kmem_entry->type, kmem_handle->type);
-		    	kmem_handle->type = kmem_entry->type;
-			return -EINVAL;
-		    }
-
-		    if (((kmem_handle->type&PCILIB_KMEM_TYPE_MASK) == PCILIB_KMEM_TYPE_PAGE)&&(kmem_handle->size == 0)) {
-			kmem_handle->size = kmem_entry->size;
-		    } else if (kmem_handle->size != kmem_entry->size) {
-			mod_info("Invalid size of reusable kmem_entry, currently: %lu, but requested: %lu\n", kmem_entry->size, kmem_handle->size);
-			kmem_handle->size = kmem_entry->size;
-			return -EINVAL;
-		    }
-
-		    if (kmem_handle->align != kmem_entry->align) {
-			mod_info("Invalid alignment of reusable kmem_entry, currently: %lu, but requested: %lu\n", kmem_entry->align, kmem_handle->align);
-			kmem_handle->align = kmem_entry->align;
-			return -EINVAL;
-		    }
-
-		    if (((kmem_entry->mode&KMEM_MODE_EXCLUSIVE)?1:0) != ((flags&KMEM_FLAG_EXCLUSIVE)?1:0)) {
-			mod_info("Invalid mode of reusable kmem_entry\n");
-			kmem_handle->flags = (kmem_entry->mode&KMEM_MODE_EXCLUSIVE)?KMEM_FLAG_EXCLUSIVE:0;
-			return -EINVAL;
-		    }
-		}
-		
-
-		if ((kmem_entry->mode&KMEM_MODE_COUNT)==KMEM_MODE_COUNT) {
-			mod_info("Reuse counter of kmem_entry is overflown");
-			return -EBUSY;
-		}
-		
-		
-		kmem_handle->handle_id = kmem_entry->id;
-		kmem_handle->ba = (unsigned long)(kmem_entry->dma_handle);
-		kmem_handle->pa = virt_to_phys((void*)kmem_entry->cpua);
-
-		kmem_handle->flags = KMEM_FLAG_REUSED;
-		if (kmem_entry->refs&KMEM_REF_HW) kmem_handle->flags |= KMEM_FLAG_REUSED_HW;
-		if (kmem_entry->mode&KMEM_MODE_PERSISTENT) kmem_handle->flags |= KMEM_FLAG_REUSED_PERSISTENT;
-
-		kmem_entry->mode += 1;
-		if (flags&KMEM_FLAG_HW) {
-		    if ((kmem_entry->refs&KMEM_REF_HW)==0)
-			pcidriver_module_get(privdata);
-			
-		    kmem_entry->refs |= KMEM_REF_HW;
-		}
-		if (flags&KMEM_FLAG_PERSISTENT) kmem_entry->mode |= KMEM_MODE_PERSISTENT;
-
-		privdata->kmem_cur_id = kmem_entry->id;
-		
-		return 0;
-	    }
-	    
-	    if (kmem_handle->flags&KMEM_FLAG_TRY) return -ENOENT;
-	}
-
-	/* First, allocate zeroed memory for the kmem_entry */
-	if ((kmem_entry = kcalloc(1, sizeof(pcidriver_kmem_entry_t), GFP_KERNEL)) == NULL)
-		goto kmem_alloc_entry_fail;
-
-	/* Initialize the kmem_entry */
-	kmem_entry->id = atomic_inc_return(&privdata->kmem_count) - 1;
-	privdata->kmem_cur_id = kmem_entry->id;
-	kmem_handle->handle_id = kmem_entry->id;
-
-	kmem_entry->use = kmem_handle->use;
-	kmem_entry->item = kmem_handle->item;
-	kmem_entry->type = kmem_handle->type;
-	kmem_entry->align = kmem_handle->align;
-	kmem_entry->direction = PCI_DMA_NONE;
-
-	/* Initialize sysfs if possible */
-	if (pcidriver_sysfs_initialize_kmem(privdata, kmem_entry->id, &(kmem_entry->sysfs_attr)) != 0)
-		goto kmem_alloc_mem_fail;
-
-	/* ...and allocate the DMA memory */
-	/* note this is a memory pair, referencing the same area: the cpu address (cpua)
-	 * and the PCI bus address (pa). The CPU and PCI addresses may not be the same.
-	 * The CPU sees only CPU addresses, while the device sees only PCI addresses.
-	 * CPU address is used for the mmap (internal to the driver), and
-	 * PCI address is the address passed to the DMA Controller in the device.
-	 */
-	switch (kmem_entry->type&PCILIB_KMEM_TYPE_MASK) {
-	 case PCILIB_KMEM_TYPE_CONSISTENT:
+    int flags;
+    pcidriver_kmem_entry_t *kmem_entry;
+    void *retptr;
+
+    if (kmem_handle->flags&KMEM_FLAG_REUSE) {
+        kmem_entry = pcidriver_kmem_find_entry_use(privdata, kmem_handle->use, kmem_handle->item);
+        if (kmem_entry) {
+            unsigned long flags = kmem_handle->flags;
+
+            if (flags&KMEM_FLAG_TRY) {
+                kmem_handle->type = kmem_entry->type;
+                kmem_handle->size = kmem_entry->size;
+                kmem_handle->align = kmem_entry->align;
+            } else {
+                if (kmem_handle->type != kmem_entry->type) {
+                    mod_info("Invalid type of reusable kmem_entry, currently: %lu, but requested: %lu\n", kmem_entry->type, kmem_handle->type);
+                    kmem_handle->type = kmem_entry->type;
+                    return -EINVAL;
+                }
+
+                if (((kmem_handle->type&PCILIB_KMEM_TYPE_MASK) == PCILIB_KMEM_TYPE_PAGE)&&(kmem_handle->size == 0)) {
+                    kmem_handle->size = kmem_entry->size;
+                } else if (kmem_handle->size != kmem_entry->size) {
+                    mod_info("Invalid size of reusable kmem_entry, currently: %lu, but requested: %lu\n", kmem_entry->size, kmem_handle->size);
+                    kmem_handle->size = kmem_entry->size;
+                    return -EINVAL;
+                }
+
+                if (kmem_handle->align != kmem_entry->align) {
+                    mod_info("Invalid alignment of reusable kmem_entry, currently: %lu, but requested: %lu\n", kmem_entry->align, kmem_handle->align);
+                    kmem_handle->align = kmem_entry->align;
+                    return -EINVAL;
+                }
+
+                if (((kmem_entry->mode&KMEM_MODE_EXCLUSIVE)?1:0) != ((flags&KMEM_FLAG_EXCLUSIVE)?1:0)) {
+                    mod_info("Invalid mode of reusable kmem_entry\n");
+                    kmem_handle->flags = (kmem_entry->mode&KMEM_MODE_EXCLUSIVE)?KMEM_FLAG_EXCLUSIVE:0;
+                    return -EINVAL;
+                }
+            }
+
+
+            if ((kmem_entry->mode&KMEM_MODE_COUNT)==KMEM_MODE_COUNT) {
+                mod_info("Reuse counter of kmem_entry is overflown");
+                return -EBUSY;
+            }
+
+
+            kmem_handle->handle_id = kmem_entry->id;
+            kmem_handle->ba = (unsigned long)(kmem_entry->dma_handle);
+            kmem_handle->pa = virt_to_phys((void*)kmem_entry->cpua);
+
+            kmem_handle->flags = KMEM_FLAG_REUSED;
+            if (kmem_entry->refs&KMEM_REF_HW) kmem_handle->flags |= KMEM_FLAG_REUSED_HW;
+            if (kmem_entry->mode&KMEM_MODE_PERSISTENT) kmem_handle->flags |= KMEM_FLAG_REUSED_PERSISTENT;
+
+            kmem_entry->mode += 1;
+            if (flags&KMEM_FLAG_HW) {
+                if ((kmem_entry->refs&KMEM_REF_HW)==0)
+                    pcidriver_module_get(privdata);
+
+                kmem_entry->refs |= KMEM_REF_HW;
+            }
+            if (flags&KMEM_FLAG_PERSISTENT) kmem_entry->mode |= KMEM_MODE_PERSISTENT;
+
+            privdata->kmem_cur_id = kmem_entry->id;
+
+            return 0;
+        }
+
+        if (kmem_handle->flags&KMEM_FLAG_TRY) return -ENOENT;
+    }
+
+    /* First, allocate zeroed memory for the kmem_entry */
+    if ((kmem_entry = kcalloc(1, sizeof(pcidriver_kmem_entry_t), GFP_KERNEL)) == NULL)
+        goto kmem_alloc_entry_fail;
+
+    /* Initialize the kmem_entry */
+    kmem_entry->id = atomic_inc_return(&privdata->kmem_count) - 1;
+    privdata->kmem_cur_id = kmem_entry->id;
+    kmem_handle->handle_id = kmem_entry->id;
+
+    kmem_entry->use = kmem_handle->use;
+    kmem_entry->item = kmem_handle->item;
+    kmem_entry->type = kmem_handle->type;
+    kmem_entry->align = kmem_handle->align;
+    kmem_entry->direction = PCI_DMA_NONE;
+
+    /* Initialize sysfs if possible */
+    if (pcidriver_sysfs_initialize_kmem(privdata, kmem_entry->id, &(kmem_entry->sysfs_attr)) != 0)
+        goto kmem_alloc_mem_fail;
+
+    /* ...and allocate the DMA memory */
+    /* note this is a memory pair, referencing the same area: the cpu address (cpua)
+     * and the PCI bus address (pa). The CPU and PCI addresses may not be the same.
+     * The CPU sees only CPU addresses, while the device sees only PCI addresses.
+     * CPU address is used for the mmap (internal to the driver), and
+     * PCI address is the address passed to the DMA Controller in the device.
+     */
+    switch (kmem_entry->type&PCILIB_KMEM_TYPE_MASK) {
+    case PCILIB_KMEM_TYPE_CONSISTENT:
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	    retptr = kmalloc( kmem_handle->size, GFP_KERNEL);
+        retptr = kmalloc( kmem_handle->size, GFP_KERNEL);
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	    retptr = pci_alloc_consistent( privdata->pdev, kmem_handle->size, &(kmem_entry->dma_handle) );
+        retptr = pci_alloc_consistent( privdata->pdev, kmem_handle->size, &(kmem_entry->dma_handle) );
 #endif /* PCIDRIVER_DUMMY_DEVICE */
-	    break;
-	 case PCILIB_KMEM_TYPE_REGION:
-	    retptr = ioremap(kmem_handle->pa,  kmem_handle->size);
-	    kmem_entry->dma_handle = kmem_handle->pa;
-	    if (kmem_entry->type == PCILIB_KMEM_TYPE_REGION_S2C) {
-		kmem_entry->direction = PCI_DMA_TODEVICE;
-	    } else if (kmem_entry->type == PCILIB_KMEM_TYPE_REGION_C2S) {
-		kmem_entry->direction = PCI_DMA_FROMDEVICE;
-	    }
-	    break;
-	 case PCILIB_KMEM_TYPE_PAGE:
-	    flags = GFP_KERNEL;
-
-	    if (kmem_handle->size == 0)
-		kmem_handle->size = PAGE_SIZE;
-	    else if (kmem_handle->size%PAGE_SIZE)
-		goto kmem_alloc_mem_fail;
-	    else 
-		flags |= __GFP_COMP;
-	
-	    retptr = (void*)__get_free_pages(flags, get_order(kmem_handle->size));
-	    kmem_entry->dma_handle = 0;
-
-	    if (retptr) {
+        break;
+    case PCILIB_KMEM_TYPE_REGION:
+        retptr = ioremap(kmem_handle->pa,  kmem_handle->size);
+        kmem_entry->dma_handle = kmem_handle->pa;
+        if (kmem_entry->type == PCILIB_KMEM_TYPE_REGION_S2C) {
+            kmem_entry->direction = PCI_DMA_TODEVICE;
+        } else if (kmem_entry->type == PCILIB_KMEM_TYPE_REGION_C2S) {
+            kmem_entry->direction = PCI_DMA_FROMDEVICE;
+        }
+        break;
+    case PCILIB_KMEM_TYPE_PAGE:
+        flags = GFP_KERNEL;
+
+        if (kmem_handle->size == 0)
+            kmem_handle->size = PAGE_SIZE;
+        else if (kmem_handle->size%PAGE_SIZE)
+            goto kmem_alloc_mem_fail;
+        else
+            flags |= __GFP_COMP;
+
+        retptr = (void*)__get_free_pages(flags, get_order(kmem_handle->size));
+        kmem_entry->dma_handle = 0;
+
+        if (retptr) {
 #ifndef PCIDRIVER_DUMMY_DEVICE
-	        if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE) {
-		    kmem_entry->direction = PCI_DMA_TODEVICE;
-    		    kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, kmem_handle->size, PCI_DMA_TODEVICE);
-		    if (pci_dma_mapping_error(privdata->pdev, kmem_entry->dma_handle)) {
-			free_pages((unsigned long)retptr, get_order(kmem_handle->size));
-			goto kmem_alloc_mem_fail;
-		    }
-		} else if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_C2S_PAGE) {
-		    kmem_entry->direction = PCI_DMA_FROMDEVICE;
-    		    kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, kmem_handle->size, PCI_DMA_FROMDEVICE);
-		    if (pci_dma_mapping_error(privdata->pdev, kmem_entry->dma_handle)) {
-			free_pages((unsigned long)retptr, get_order(kmem_handle->size));
-			goto kmem_alloc_mem_fail;
-		    
-		    }
-		}
+            if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE) {
+                kmem_entry->direction = PCI_DMA_TODEVICE;
+                kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, kmem_handle->size, PCI_DMA_TODEVICE);
+                if (pci_dma_mapping_error(privdata->pdev, kmem_entry->dma_handle)) {
+                    free_pages((unsigned long)retptr, get_order(kmem_handle->size));
+                    goto kmem_alloc_mem_fail;
+                }
+            } else if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_C2S_PAGE) {
+                kmem_entry->direction = PCI_DMA_FROMDEVICE;
+                kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, kmem_handle->size, PCI_DMA_FROMDEVICE);
+                if (pci_dma_mapping_error(privdata->pdev, kmem_entry->dma_handle)) {
+                    free_pages((unsigned long)retptr, get_order(kmem_handle->size));
+                    goto kmem_alloc_mem_fail;
+
+                }
+            }
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
-	    }
-	    
-	    break;
-	 default:
-	    goto kmem_alloc_mem_fail;
-	}
-	
-	
-	if (retptr == NULL)
-		goto kmem_alloc_mem_fail;
-
-	kmem_entry->size = kmem_handle->size;
-	kmem_entry->cpua = (unsigned long)retptr;
-	kmem_handle->ba = (unsigned long)(kmem_entry->dma_handle);
-	kmem_handle->pa = virt_to_phys(retptr);
-
-	kmem_entry->mode = 1;
-	if (kmem_handle->flags&KMEM_FLAG_REUSE) {
-	    kmem_entry->mode |= KMEM_MODE_REUSABLE;
-	    if (kmem_handle->flags&KMEM_FLAG_EXCLUSIVE) kmem_entry->mode |= KMEM_MODE_EXCLUSIVE;
-	    if (kmem_handle->flags&KMEM_FLAG_PERSISTENT) kmem_entry->mode |= KMEM_MODE_PERSISTENT;
-	}
-	
-	kmem_entry->refs = 0;
-	if (kmem_handle->flags&KMEM_FLAG_HW) {
-	    pcidriver_module_get(privdata);
-
-	    kmem_entry->refs |= KMEM_REF_HW;
-	}
-
-        kmem_handle->flags = 0;
-	
-	set_pages_reserved_compat(kmem_entry->cpua, kmem_entry->size);
-
-	/* Add the kmem_entry to the list of the device */
-	spin_lock( &(privdata->kmemlist_lock) );
-	list_add_tail( &(kmem_entry->list), &(privdata->kmem_list) );
-	spin_unlock( &(privdata->kmemlist_lock) );
-
-	return 0;
+        }
+
+        break;
+    default:
+        goto kmem_alloc_mem_fail;
+    }
+
+
+    if (retptr == NULL)
+        goto kmem_alloc_mem_fail;
+
+    kmem_entry->size = kmem_handle->size;
+    kmem_entry->cpua = (unsigned long)retptr;
+    kmem_handle->ba = (unsigned long)(kmem_entry->dma_handle);
+    kmem_handle->pa = virt_to_phys(retptr);
+
+    kmem_entry->mode = 1;
+    if (kmem_handle->flags&KMEM_FLAG_REUSE) {
+        kmem_entry->mode |= KMEM_MODE_REUSABLE;
+        if (kmem_handle->flags&KMEM_FLAG_EXCLUSIVE) kmem_entry->mode |= KMEM_MODE_EXCLUSIVE;
+        if (kmem_handle->flags&KMEM_FLAG_PERSISTENT) kmem_entry->mode |= KMEM_MODE_PERSISTENT;
+    }
+
+    kmem_entry->refs = 0;
+    if (kmem_handle->flags&KMEM_FLAG_HW) {
+        pcidriver_module_get(privdata);
+
+        kmem_entry->refs |= KMEM_REF_HW;
+    }
+
+    kmem_handle->flags = 0;
+
+    /* Add the kmem_entry to the list of the device */
+    spin_lock( &(privdata->kmemlist_lock) );
+    list_add_tail( &(kmem_entry->list), &(privdata->kmem_list) );
+    spin_unlock( &(privdata->kmemlist_lock) );
+
+    return 0;
 
 kmem_alloc_mem_fail:
-		kfree(kmem_entry);
+    kfree(kmem_entry);
 kmem_alloc_entry_fail:
-		return -ENOMEM;
+    return -ENOMEM;
 }
 
 static int pcidriver_kmem_free_check(pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle, pcidriver_kmem_entry_t *kmem_entry) {
-	if ((kmem_handle->flags & KMEM_FLAG_FORCE) == 0) {
-	    if (kmem_entry->mode&KMEM_MODE_COUNT)
-		kmem_entry->mode -= 1;
-
-	    if (kmem_handle->flags&KMEM_FLAG_HW) {
-		if (kmem_entry->refs&KMEM_REF_HW) 
-		    pcidriver_module_put(privdata);
-
-		kmem_entry->refs &= ~KMEM_REF_HW;
-	    }
-	
-	    if (kmem_handle->flags&KMEM_FLAG_PERSISTENT)
-		kmem_entry->mode &= ~KMEM_MODE_PERSISTENT;
-	
-	    if (kmem_handle->flags&KMEM_FLAG_REUSE) 
-		return 0;
-
-	    if (kmem_entry->refs) {
-		kmem_entry->mode += 1;
-		mod_info("can't free referenced kmem_entry, refs = %lx\n", kmem_entry->refs);
-		return -EBUSY;
-	    }
-	
-	    if (kmem_entry->mode & KMEM_MODE_PERSISTENT) {
-		kmem_entry->mode += 1;
-		mod_info("can't free persistent kmem_entry\n");
-		return -EBUSY;
-	    }
-
-	    if (((kmem_entry->mode&KMEM_MODE_EXCLUSIVE)==0)&&(kmem_entry->mode&KMEM_MODE_COUNT)&&((kmem_handle->flags&KMEM_FLAG_EXCLUSIVE)==0)) 
-		return 0;
-	} else {
-	    if (kmem_entry->refs&KMEM_REF_HW)
-		    pcidriver_module_put(privdata);
-		
-	    while (!atomic_add_negative(-1, &(privdata->refs))) pcidriver_module_put(privdata);
-	    atomic_inc(&(privdata->refs));
-		
-	}
-	
-	return 1;
+    if ((kmem_handle->flags & KMEM_FLAG_FORCE) == 0) {
+        if (kmem_entry->mode&KMEM_MODE_COUNT)
+            kmem_entry->mode -= 1;
+
+        if (kmem_handle->flags&KMEM_FLAG_HW) {
+            if (kmem_entry->refs&KMEM_REF_HW)
+                pcidriver_module_put(privdata);
+
+            kmem_entry->refs &= ~KMEM_REF_HW;
+        }
+
+        if (kmem_handle->flags&KMEM_FLAG_PERSISTENT)
+            kmem_entry->mode &= ~KMEM_MODE_PERSISTENT;
+
+        if (kmem_handle->flags&KMEM_FLAG_REUSE)
+            return 0;
+
+        if (kmem_entry->refs) {
+            kmem_entry->mode += 1;
+            mod_info("can't free referenced kmem_entry, refs = %lx\n", kmem_entry->refs);
+            return -EBUSY;
+        }
+
+        if (kmem_entry->mode & KMEM_MODE_PERSISTENT) {
+            kmem_entry->mode += 1;
+            mod_info("can't free persistent kmem_entry\n");
+            return -EBUSY;
+        }
+
+        if (((kmem_entry->mode&KMEM_MODE_EXCLUSIVE)==0)&&(kmem_entry->mode&KMEM_MODE_COUNT)&&((kmem_handle->flags&KMEM_FLAG_EXCLUSIVE)==0))
+            return 0;
+    } else {
+        if (kmem_entry->refs&KMEM_REF_HW)
+            pcidriver_module_put(privdata);
+
+        while (!atomic_add_negative(-1, &(privdata->refs))) pcidriver_module_put(privdata);
+        atomic_inc(&(privdata->refs));
+
+    }
+
+    return 1;
 }
 
 static int pcidriver_kmem_free_use(pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle)
 {
-	int err;
-	int failed = 0;
-	struct list_head *ptr, *next;
-	pcidriver_kmem_entry_t *kmem_entry;
-
-	/* iterate safely over the entries and delete them */
-	list_for_each_safe(ptr, next, &(privdata->kmem_list)) {
-		kmem_entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
-		if (kmem_entry->use == kmem_handle->use) {
-		    err = pcidriver_kmem_free_check(privdata, kmem_handle, kmem_entry);
-		    if (err > 0)
-			pcidriver_kmem_free_entry(privdata, kmem_entry); 		/* spin lock inside! */
-		    else
-			failed = 1;
-		}
-	}
-	
-	if (failed) {
-		mod_info("Some kmem_entries for use %lx are still referenced\n", kmem_handle->use);
-		return -EBUSY;
-	}	
-
-	return 0;
+    int err;
+    int failed = 0;
+    struct list_head *ptr, *next;
+    pcidriver_kmem_entry_t *kmem_entry;
+
+    /* iterate safely over the entries and delete them */
+    list_for_each_safe(ptr, next, &(privdata->kmem_list)) {
+        kmem_entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
+        if (kmem_entry->use == kmem_handle->use) {
+            err = pcidriver_kmem_free_check(privdata, kmem_handle, kmem_entry);
+            if (err > 0)
+                pcidriver_kmem_free_entry(privdata, kmem_entry); 		/* spin lock inside! */
+            else
+                failed = 1;
+        }
+    }
+
+    if (failed) {
+        mod_info("Some kmem_entries for use %lx are still referenced\n", kmem_handle->use);
+        return -EBUSY;
+    }
+
+    return 0;
 }
 
 /**
@@ -310,24 +304,24 @@ static int pcidriver_kmem_free_use(pcidriver_privdata_t *privdata, kmem_handle_t
  */
 int pcidriver_kmem_free( pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle )
 {
-	int err;
-	pcidriver_kmem_entry_t *kmem_entry;
-
-	if (kmem_handle->flags&KMEM_FLAG_MASS) {
-	    kmem_handle->flags &= ~KMEM_FLAG_MASS;
-	    return pcidriver_kmem_free_use(privdata, kmem_handle);
-	}
-	
-	/* Find the associated kmem_entry for this buffer */
-	if ((kmem_entry = pcidriver_kmem_find_entry(privdata, kmem_handle)) == NULL)
-		return -EINVAL;					/* kmem_handle is not valid */
-
-	err = pcidriver_kmem_free_check(privdata, kmem_handle, kmem_entry);
-	
-	if (err > 0)
-		return pcidriver_kmem_free_entry(privdata, kmem_entry);
-	
-	return err;
+    int err;
+    pcidriver_kmem_entry_t *kmem_entry;
+
+    if (kmem_handle->flags&KMEM_FLAG_MASS) {
+        kmem_handle->flags &= ~KMEM_FLAG_MASS;
+        return pcidriver_kmem_free_use(privdata, kmem_handle);
+    }
+
+    /* Find the associated kmem_entry for this buffer */
+    if ((kmem_entry = pcidriver_kmem_find_entry(privdata, kmem_handle)) == NULL)
+        return -EINVAL;					/* kmem_handle is not valid */
+
+    err = pcidriver_kmem_free_check(privdata, kmem_handle, kmem_entry);
+
+    if (err > 0)
+        return pcidriver_kmem_free_entry(privdata, kmem_entry);
+
+    return err;
 }
 
 /**
@@ -338,24 +332,24 @@ int pcidriver_kmem_free( pcidriver_privdata_t *privdata, kmem_handle_t *kmem_han
 int pcidriver_kmem_free_all(pcidriver_privdata_t *privdata)
 {
 //	int failed = 0;
-	struct list_head *ptr, *next;
-	pcidriver_kmem_entry_t *kmem_entry;
-
-	/* iterate safely over the entries and delete them */
-	list_for_each_safe(ptr, next, &(privdata->kmem_list)) {
-		kmem_entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
-		/*if (kmem_entry->refs)
-			failed = 1;
-		else*/
-			pcidriver_kmem_free_entry(privdata, kmem_entry); 		/* spin lock inside! */
-	}
-/*	
-	if (failed) {
-		mod_info("Some kmem_entries are still referenced\n");
-		return -EBUSY;
-	}	
-*/
-	return 0;
+    struct list_head *ptr, *next;
+    pcidriver_kmem_entry_t *kmem_entry;
+
+    /* iterate safely over the entries and delete them */
+    list_for_each_safe(ptr, next, &(privdata->kmem_list)) {
+        kmem_entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
+        /*if (kmem_entry->refs)
+        	failed = 1;
+        else*/
+        pcidriver_kmem_free_entry(privdata, kmem_entry); 		/* spin lock inside! */
+    }
+    /*
+    	if (failed) {
+    		mod_info("Some kmem_entries are still referenced\n");
+    		return -EBUSY;
+    	}
+    */
+    return 0;
 }
 
 
@@ -366,43 +360,27 @@ int pcidriver_kmem_free_all(pcidriver_privdata_t *privdata)
  */
 int pcidriver_kmem_sync_entry( pcidriver_privdata_t *privdata, pcidriver_kmem_entry_t *kmem_entry, int direction)
 {
-	if (kmem_entry->direction == PCI_DMA_NONE)
-		return -EINVAL;
+    if (kmem_entry->direction == PCI_DMA_NONE)
+        return -EINVAL;
 
 #ifndef PCIDRIVER_DUMMY_DEVICE
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,11)
-	switch (direction) {
-		case PCILIB_KMEM_SYNC_TODEVICE:
-			pci_dma_sync_single_for_device( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
-			break;
-		case PCILIB_KMEM_SYNC_FROMDEVICE:
-			pci_dma_sync_single_for_cpu( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
-			break;
-		case PCILIB_KMEM_SYNC_BIDIRECTIONAL:
-			pci_dma_sync_single_for_device( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
-			pci_dma_sync_single_for_cpu( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
-			break;
-		default:
-			return -EINVAL;				/* wrong direction parameter */
-	}
-#else
-	switch (direction) {
-		case PCILIB_KMEM_SYNC_TODEVICE:
-			pci_dma_sync_single( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
-			break;
-		case PCILIB_KMEM_SYNC_FROMDEVICE:
-			pci_dma_sync_single( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
-			break;
-		case PCILIB_KMEM_SYNC_BIDIRECTIONAL:
-			pci_dma_sync_single( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
-			break;
-		default:
-			return -EINVAL;				/* wrong direction parameter */
-	}
-#endif
+    switch (direction) {
+    case PCILIB_KMEM_SYNC_TODEVICE:
+        pci_dma_sync_single_for_device( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
+        break;
+    case PCILIB_KMEM_SYNC_FROMDEVICE:
+        pci_dma_sync_single_for_cpu( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
+        break;
+    case PCILIB_KMEM_SYNC_BIDIRECTIONAL:
+        pci_dma_sync_single_for_device( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
+        pci_dma_sync_single_for_cpu( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction );
+        break;
+    default:
+        return -EINVAL;				/* wrong direction parameter */
+    }
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
 
-	return 0;	/* success */
+    return 0;	/* success */
 }
 
 /**
@@ -412,41 +390,41 @@ int pcidriver_kmem_sync_entry( pcidriver_privdata_t *privdata, pcidriver_kmem_en
  */
 int pcidriver_kmem_sync( pcidriver_privdata_t *privdata, kmem_sync_t *kmem_sync )
 {
-	pcidriver_kmem_entry_t *kmem_entry = NULL;
-
-	    /*
-	     * This is a shortcut to quickly find a next item in big multi-page kernel buffers 
-	     */
-	spin_lock(&(privdata->kmemlist_lock));
-	if (privdata->kmem_last_sync) {
-	    if (privdata->kmem_last_sync->id == kmem_sync->handle.handle_id) 
-		kmem_entry = privdata->kmem_last_sync;
-	    else {
-		 privdata->kmem_last_sync = container_of(privdata->kmem_last_sync->list.next, pcidriver_kmem_entry_t, list);
-		
-		if (privdata->kmem_last_sync) {
-		    if (privdata->kmem_last_sync->id == kmem_sync->handle.handle_id) 
-			kmem_entry = privdata->kmem_last_sync;
-		    else
-			privdata->kmem_last_sync = NULL;
-		}
-	    }
-	}
-	spin_unlock(&(privdata->kmemlist_lock));
-	
-	    /*
-	     * If not found go the standard way
-	     */
-	if (!kmem_entry) {
-	    if ((kmem_entry = pcidriver_kmem_find_entry(privdata, &(kmem_sync->handle))) == NULL)
-		return -EINVAL;					/* kmem_handle is not valid */
-	
-	    spin_lock(&(privdata->kmemlist_lock));
-	    privdata->kmem_last_sync = kmem_entry;
-	    spin_unlock(&(privdata->kmemlist_lock));
-	} 
-
-	return pcidriver_kmem_sync_entry(privdata, kmem_entry, kmem_sync->dir);
+    pcidriver_kmem_entry_t *kmem_entry = NULL;
+
+    /*
+     * This is a shortcut to quickly find a next item in big multi-page kernel buffers
+     */
+    spin_lock(&(privdata->kmemlist_lock));
+    if (privdata->kmem_last_sync) {
+        if (privdata->kmem_last_sync->id == kmem_sync->handle.handle_id)
+            kmem_entry = privdata->kmem_last_sync;
+        else {
+            privdata->kmem_last_sync = container_of(privdata->kmem_last_sync->list.next, pcidriver_kmem_entry_t, list);
+
+            if (privdata->kmem_last_sync) {
+                if (privdata->kmem_last_sync->id == kmem_sync->handle.handle_id)
+                    kmem_entry = privdata->kmem_last_sync;
+                else
+                    privdata->kmem_last_sync = NULL;
+            }
+        }
+    }
+    spin_unlock(&(privdata->kmemlist_lock));
+
+    /*
+     * If not found go the standard way
+     */
+    if (!kmem_entry) {
+        if ((kmem_entry = pcidriver_kmem_find_entry(privdata, &(kmem_sync->handle))) == NULL)
+            return -EINVAL;					/* kmem_handle is not valid */
+
+        spin_lock(&(privdata->kmemlist_lock));
+        privdata->kmem_last_sync = kmem_entry;
+        spin_unlock(&(privdata->kmemlist_lock));
+    }
+
+    return pcidriver_kmem_sync_entry(privdata, kmem_entry, kmem_sync->dir);
 }
 
 /**
@@ -456,75 +434,46 @@ int pcidriver_kmem_sync( pcidriver_privdata_t *privdata, kmem_sync_t *kmem_sync
  */
 int pcidriver_kmem_free_entry(pcidriver_privdata_t *privdata, pcidriver_kmem_entry_t *kmem_entry)
 {
-	pcidriver_sysfs_remove(privdata, &(kmem_entry->sysfs_attr));
-
-	/* Go over the pages of the kmem buffer, and mark them as not reserved */
-#if 0
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
-	/*
-	 * This code is DISABLED.
-	 * Apparently, it is not needed to unreserve them. Doing so here
-	 * hangs the machine. Why?
-	 *
-	 * Uhm.. see links:
-	 *
-	 * http://lwn.net/Articles/161204/
-	 * http://lists.openfabrics.org/pipermail/general/2007-March/034101.html
-	 *
-	 * I insist, this should be enabled, but doing so hangs the machine.
-	 * Literature supports the point, and there is even a similar problem (see link)
-	 * But this is not the case. It seems right to me. but obviously is not.
-	 *
-	 * Anyway, this goes away in kernel >=2.6.15.
-	 */
-	unsigned long start = __pa(kmem_entry->cpua) >> PAGE_SHIFT;
-	unsigned long end = __pa(kmem_entry->cpua + kmem_entry->size) >> PAGE_SHIFT;
-	unsigned long i;
-	for(i=start;i<end;i++) {
-		struct page *kpage = pfn_to_page(i);
-		ClearPageReserved(kpage);
-	}
-#endif
-#endif
-
-	/* Release DMA memory */
-	switch (kmem_entry->type&PCILIB_KMEM_TYPE_MASK) {
-	 case PCILIB_KMEM_TYPE_CONSISTENT:
+    pcidriver_sysfs_remove(privdata, &(kmem_entry->sysfs_attr));
+
+    /* Release DMA memory */
+    switch (kmem_entry->type&PCILIB_KMEM_TYPE_MASK) {
+    case PCILIB_KMEM_TYPE_CONSISTENT:
 #ifdef PCIDRIVER_DUMMY_DEVICE
-	    kfree((void*)(kmem_entry->cpua));
+        kfree((void*)(kmem_entry->cpua));
 #else /* PCIDRIVER_DUMMY_DEVICE */
-	    pci_free_consistent( privdata->pdev, kmem_entry->size, (void *)(kmem_entry->cpua), kmem_entry->dma_handle );
+        pci_free_consistent( privdata->pdev, kmem_entry->size, (void *)(kmem_entry->cpua), kmem_entry->dma_handle );
 #endif /* PCIDRIVER_DUMMY_DEVICE */
-	    break;
-	 case PCILIB_KMEM_TYPE_REGION:
-	    iounmap((void *)(kmem_entry->cpua));
-	    break;
-	 case PCILIB_KMEM_TYPE_PAGE:
+        break;
+    case PCILIB_KMEM_TYPE_REGION:
+        iounmap((void *)(kmem_entry->cpua));
+        break;
+    case PCILIB_KMEM_TYPE_PAGE:
 #ifndef PCIDRIVER_DUMMY_DEVICE
-	    if (kmem_entry->dma_handle) {
-		if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE) {
-		    pci_unmap_single(privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, PCI_DMA_TODEVICE);
-		} else if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_C2S_PAGE) {
-		    pci_unmap_single(privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, PCI_DMA_FROMDEVICE);
-		}
-	    }
+        if (kmem_entry->dma_handle) {
+            if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE) {
+                pci_unmap_single(privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, PCI_DMA_TODEVICE);
+            } else if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_C2S_PAGE) {
+                pci_unmap_single(privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, PCI_DMA_FROMDEVICE);
+            }
+        }
 #endif /* ! PCIDRIVER_DUMMY_DEVICE */
-	    free_pages((unsigned long)kmem_entry->cpua, get_order(kmem_entry->size));
-	    break;
-	}
+        free_pages((unsigned long)kmem_entry->cpua, get_order(kmem_entry->size));
+        break;
+    }
 
 
-	/* Remove the kmem list entry */
-	spin_lock( &(privdata->kmemlist_lock) );
-	if (privdata->kmem_last_sync == kmem_entry)
-	    privdata->kmem_last_sync = NULL;
-	list_del( &(kmem_entry->list) );
-	spin_unlock( &(privdata->kmemlist_lock) );
+    /* Remove the kmem list entry */
+    spin_lock( &(privdata->kmemlist_lock) );
+    if (privdata->kmem_last_sync == kmem_entry)
+        privdata->kmem_last_sync = NULL;
+    list_del( &(kmem_entry->list) );
+    spin_unlock( &(privdata->kmemlist_lock) );
 
-	/* Release kmem_entry memory */
-	kfree(kmem_entry);
+    /* Release kmem_entry memory */
+    kfree(kmem_entry);
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -534,23 +483,23 @@ int pcidriver_kmem_free_entry(pcidriver_privdata_t *privdata, pcidriver_kmem_ent
  */
 pcidriver_kmem_entry_t *pcidriver_kmem_find_entry(pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle)
 {
-	struct list_head *ptr;
-	pcidriver_kmem_entry_t *entry, *result = NULL;
+    struct list_head *ptr;
+    pcidriver_kmem_entry_t *entry, *result = NULL;
 
-	/* should I implement it better using the handle_id? */
+    /* should I implement it better using the handle_id? */
 
-	spin_lock(&(privdata->kmemlist_lock));
-	list_for_each(ptr, &(privdata->kmem_list)) {
-		entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
+    spin_lock(&(privdata->kmemlist_lock));
+    list_for_each(ptr, &(privdata->kmem_list)) {
+        entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
 
-		if (entry->id == kmem_handle->handle_id) {
-			result = entry;
-			break;
-		}
-	}
+        if (entry->id == kmem_handle->handle_id) {
+            result = entry;
+            break;
+        }
+    }
 
-	spin_unlock(&(privdata->kmemlist_lock));
-	return result;
+    spin_unlock(&(privdata->kmemlist_lock));
+    return result;
 }
 
 /**
@@ -560,21 +509,21 @@ pcidriver_kmem_entry_t *pcidriver_kmem_find_entry(pcidriver_privdata_t *privdata
  */
 pcidriver_kmem_entry_t *pcidriver_kmem_find_entry_id(pcidriver_privdata_t *privdata, int id)
 {
-	struct list_head *ptr;
-	pcidriver_kmem_entry_t *entry, *result = NULL;
+    struct list_head *ptr;
+    pcidriver_kmem_entry_t *entry, *result = NULL;
 
-	spin_lock(&(privdata->kmemlist_lock));
-	list_for_each(ptr, &(privdata->kmem_list)) {
-		entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
+    spin_lock(&(privdata->kmemlist_lock));
+    list_for_each(ptr, &(privdata->kmem_list)) {
+        entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
 
-		if (entry->id == id) {
-			result = entry;
-			break;
-		}
-	}
+        if (entry->id == id) {
+            result = entry;
+            break;
+        }
+    }
 
-	spin_unlock(&(privdata->kmemlist_lock));
-	return result;
+    spin_unlock(&(privdata->kmemlist_lock));
+    return result;
 }
 
 /**
@@ -584,21 +533,21 @@ pcidriver_kmem_entry_t *pcidriver_kmem_find_entry_id(pcidriver_privdata_t *privd
  */
 pcidriver_kmem_entry_t *pcidriver_kmem_find_entry_use(pcidriver_privdata_t *privdata, unsigned long use, unsigned long item)
 {
-	struct list_head *ptr;
-	pcidriver_kmem_entry_t *entry, *result = NULL;
+    struct list_head *ptr;
+    pcidriver_kmem_entry_t *entry, *result = NULL;
 
-	spin_lock(&(privdata->kmemlist_lock));
-	list_for_each(ptr, &(privdata->kmem_list)) {
-		entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
+    spin_lock(&(privdata->kmemlist_lock));
+    list_for_each(ptr, &(privdata->kmem_list)) {
+        entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
 
-		if ((entry->use == use)&&(entry->item == item)&&(entry->mode&KMEM_MODE_REUSABLE)) {
-			result = entry;
-			break;
-		}
-	}
+        if ((entry->use == use)&&(entry->item == item)&&(entry->mode&KMEM_MODE_REUSABLE)) {
+            result = entry;
+            break;
+        }
+    }
 
-	spin_unlock(&(privdata->kmemlist_lock));
-	return result;
+    spin_unlock(&(privdata->kmemlist_lock));
+    return result;
 }
 
 
@@ -606,18 +555,18 @@ void pcidriver_kmem_mmap_close(struct vm_area_struct *vma) {
     unsigned long vma_size;
     pcidriver_kmem_entry_t *kmem_entry = (pcidriver_kmem_entry_t*)vma->vm_private_data;
     if (kmem_entry) {
-/*
-	if (kmem_entry->id == 0) {
-	    mod_info("refs: %p %p %lx\n", vma, vma->vm_private_data, kmem_entry->refs);
-	    mod_info("kmem_size: %lu vma_size: %lu, s: %lx, e: %lx\n", kmem_entry->size, (vma->vm_end - vma->vm_start), vma->vm_start, vma->vm_end);
-	}
-*/
-
-	vma_size = (vma->vm_end - vma->vm_start);
-	
-	if (kmem_entry->refs&KMEM_REF_COUNT) {
-	    kmem_entry->refs -= vma_size / PAGE_SIZE;
-	}
+        /*
+        	if (kmem_entry->id == 0) {
+        	    mod_info("refs: %p %p %lx\n", vma, vma->vm_private_data, kmem_entry->refs);
+        	    mod_info("kmem_size: %lu vma_size: %lu, s: %lx, e: %lx\n", kmem_entry->size, (vma->vm_end - vma->vm_start), vma->vm_start, vma->vm_end);
+        	}
+        */
+
+        vma_size = (vma->vm_end - vma->vm_start);
+
+        if (kmem_entry->refs&KMEM_REF_COUNT) {
+            kmem_entry->refs -= vma_size / PAGE_SIZE;
+        }
     }
 }
 
@@ -632,78 +581,66 @@ static struct vm_operations_struct pcidriver_kmem_mmap_ops = {
  */
 int pcidriver_mmap_kmem(pcidriver_privdata_t *privdata, struct vm_area_struct *vma)
 {
-	unsigned long vma_size;
-	pcidriver_kmem_entry_t *kmem_entry;
-	int ret;
-
-	mod_info_dbg("Entering mmap_kmem\n");
-
-	/* FIXME: Is this really right? Always just the latest one? Can't we identify one? */
-	/* Get latest entry on the kmem_list */
-	kmem_entry = pcidriver_kmem_find_entry_id(privdata, privdata->kmem_cur_id);
-	if (!kmem_entry) {
-		mod_info("Trying to mmap a kernel memory buffer without creating it first!\n");
-		return -EFAULT;
-	}
-
-	mod_info_dbg("Got kmem_entry with id: %d\n", kmem_entry->id);
-
-	/* Check sizes */
-	vma_size = (vma->vm_end - vma->vm_start);
-	
-	if ((vma_size > kmem_entry->size) &&
-		((kmem_entry->size < PAGE_SIZE) && (vma_size != PAGE_SIZE))) {
-		mod_info("kem_entry size(%lu) and vma size do not match(%lu)\n", kmem_entry->size, vma_size);
-		return -EINVAL;
-	}
-
-	/* reference counting */
-	if ((kmem_entry->mode&KMEM_MODE_EXCLUSIVE)&&(kmem_entry->refs&KMEM_REF_COUNT)) {
-		mod_info("can't make second mmaping for exclusive kmem_entry\n");
-		return -EBUSY;
-	}
-	if (((kmem_entry->refs&KMEM_REF_COUNT) + (vma_size / PAGE_SIZE)) > KMEM_REF_COUNT) {
-		mod_info("maximal amount of references is reached by kmem_entry\n");
-		return -EBUSY;
-	}
-	
-	kmem_entry->refs += vma_size / PAGE_SIZE;
-
-	vma->vm_flags |= (VM_RESERVED);
-
-#ifdef pgprot_noncached
-	// This is coherent memory, so it must not be cached.
-	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-#endif
-
-	mod_info_dbg("Mapping address %08lx / PFN %08lx\n",
-			virt_to_phys((void*)kmem_entry->cpua),
-			page_to_pfn(virt_to_page((void*)kmem_entry->cpua)));
-
-	 if ((kmem_entry->type&PCILIB_KMEM_TYPE_MASK) == PCILIB_KMEM_TYPE_REGION) {
-		ret = remap_pfn_range_compat(
-					vma,
-					vma->vm_start,
-					kmem_entry->dma_handle,
-					(vma_size < kmem_entry->size)?vma_size:kmem_entry->size,
-					vma->vm_page_prot);
-	 } else {
-		ret = remap_pfn_range_cpua_compat(
-					vma,
-					vma->vm_start,
-					kmem_entry->cpua,
-					(vma_size < kmem_entry->size)?vma_size:kmem_entry->size,
-					vma->vm_page_prot );
-	}
-
-	if (ret) {
-		mod_info("kmem remap failed: %d (%lx)\n", ret,kmem_entry->cpua);
-		kmem_entry->refs -= 1;
-		return -EAGAIN;
-	}
-
-	vma->vm_ops = &pcidriver_kmem_mmap_ops;
-	vma->vm_private_data = (void*)kmem_entry;
-	
-	return ret;
+    unsigned long vma_size;
+    pcidriver_kmem_entry_t *kmem_entry;
+    int ret;
+
+    mod_info_dbg("Entering mmap_kmem\n");
+
+    /* FIXME: Is this really right? Always just the latest one? Can't we identify one? */
+    /* Get latest entry on the kmem_list */
+    kmem_entry = pcidriver_kmem_find_entry_id(privdata, privdata->kmem_cur_id);
+    if (!kmem_entry) {
+        mod_info("Trying to mmap a kernel memory buffer without creating it first!\n");
+        return -EFAULT;
+    }
+
+    mod_info_dbg("Got kmem_entry with id: %d\n", kmem_entry->id);
+
+    /* Check sizes */
+    vma_size = (vma->vm_end - vma->vm_start);
+
+    if ((vma_size > kmem_entry->size) &&
+            ((kmem_entry->size < PAGE_SIZE) && (vma_size != PAGE_SIZE))) {
+        mod_info("kem_entry size(%lu) and vma size do not match(%lu)\n", kmem_entry->size, vma_size);
+        return -EINVAL;
+    }
+
+    /* reference counting */
+    if ((kmem_entry->mode&KMEM_MODE_EXCLUSIVE)&&(kmem_entry->refs&KMEM_REF_COUNT)) {
+        mod_info("can't make second mmaping for exclusive kmem_entry\n");
+        return -EBUSY;
+    }
+    if (((kmem_entry->refs&KMEM_REF_COUNT) + (vma_size / PAGE_SIZE)) > KMEM_REF_COUNT) {
+        mod_info("maximal amount of references is reached by kmem_entry\n");
+        return -EBUSY;
+    }
+
+    kmem_entry->refs += vma_size / PAGE_SIZE;
+
+    vma->vm_flags |= (VM_RESERVED);
+
+    // This is coherent memory, so it must not be cached.
+    vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+    mod_info_dbg("Mapping address %08lx / PFN %08lx\n",
+                 virt_to_phys((void*)kmem_entry->cpua),
+                 page_to_pfn(virt_to_page((void*)kmem_entry->cpua)));
+
+    if ((kmem_entry->type&PCILIB_KMEM_TYPE_MASK) == PCILIB_KMEM_TYPE_REGION) {
+        ret = remap_pfn_range_compat(vma, vma->vm_start, kmem_entry->dma_handle, (vma_size < kmem_entry->size)?vma_size:kmem_entry->size, vma->vm_page_prot);
+    } else {
+        ret = remap_pfn_range_cpua_compat(vma, vma->vm_start, kmem_entry->cpua, (vma_size < kmem_entry->size)?vma_size:kmem_entry->size, vma->vm_page_prot);
+    }
+
+    if (ret) {
+        mod_info("kmem remap failed: %d (%lx)\n", ret,kmem_entry->cpua);
+        kmem_entry->refs -= 1;
+        return -EAGAIN;
+    }
+
+    vma->vm_ops = &pcidriver_kmem_mmap_ops;
+    vma->vm_private_data = (void*)kmem_entry;
+
+    return ret;
 }
diff --git a/driver/pciDriver.h b/driver/pciDriver.h
index 371bd88..3a231bd 100644
--- a/driver/pciDriver.h
+++ b/driver/pciDriver.h
@@ -1,60 +1,6 @@
 #ifndef PCIDRIVER_H_
 #define PCIDRIVER_H_
 
-/**
- * This is a full rewrite of the pciDriver.
- * New default is to support kernel 2.6, using kernel 2.6 APIs.
- * 
- * This header defines the interface to the outside world.
- * 
- * $Revision: 1.6 $
- * $Date: 2008-01-24 14:21:36 $
- * 
- */
-
-/*
- * Change History:
- * 
- * $Log: not supported by cvs2svn $
- * Revision 1.5  2008-01-11 10:15:14  marcus
- * Removed unused interrupt code.
- * Added intSource to the wait interrupt call.
- *
- * Revision 1.4  2006/11/17 18:44:42  marcus
- * Type of SG list can now be selected at runtime. Added type to sglist.
- *
- * Revision 1.3  2006/11/17 16:23:02  marcus
- * Added slot number to the PCI info IOctl.
- *
- * Revision 1.2  2006/11/13 12:29:09  marcus
- * Added a IOctl call, to confiure the interrupt response. (testing pending).
- * Basic interrupts are now supported.
- *
- * Revision 1.1  2006/10/10 14:46:52  marcus
- * Initial commit of the new pciDriver for kernel 2.6
- *
- * Revision 1.7  2006/10/06 15:18:06  marcus
- * Updated PCI info and PCI cmd
- *
- * Revision 1.6  2006/09/25 16:51:07  marcus
- * Added PCI config IOctls, and implemented basic mmap functions.
- *
- * Revision 1.5  2006/09/18 17:13:12  marcus
- * backup commit.
- *
- * Revision 1.4  2006/09/15 15:44:41  marcus
- * backup commit.
- *
- * Revision 1.3  2006/08/15 11:40:02  marcus
- * backup commit.
- *
- * Revision 1.2  2006/08/12 18:28:42  marcus
- * Sync with the laptop
- *
- * Revision 1.1  2006/08/11 15:30:46  marcus
- * Sync with the laptop
- *
- */
 
 #include <linux/ioctl.h>
 
@@ -152,39 +98,39 @@ typedef struct {
 } pcilib_board_info_t;
 
 typedef struct {
-	unsigned long type;
-	unsigned long pa;
-	unsigned long ba;
-	unsigned long size;
-	unsigned long align;
-	unsigned long use;
-	unsigned long item;
-	int flags;
-	int handle_id;
+    unsigned long type;
+    unsigned long pa;
+    unsigned long ba;
+    unsigned long size;
+    unsigned long align;
+    unsigned long use;
+    unsigned long item;
+    int flags;
+    int handle_id;
 } kmem_handle_t;
 
 typedef struct {
-	unsigned long addr;
-	unsigned long size;
+    unsigned long addr;
+    unsigned long size;
 } umem_sgentry_t;
 
 typedef struct {
-	int handle_id;
-	int type;
-	int nents;
-	umem_sgentry_t *sg;
+    int handle_id;
+    int type;
+    int nents;
+    umem_sgentry_t *sg;
 } umem_sglist_t;
 
 typedef struct {
-	unsigned long vma;
-	unsigned long size;
-	int handle_id;
-	int dir;
+    unsigned long vma;
+    unsigned long size;
+    int handle_id;
+    int dir;
 } umem_handle_t;
 
 typedef struct {
-	kmem_handle_t handle;
-	int dir;
+    kmem_handle_t handle;
+    int dir;
 } kmem_sync_t;
 
 typedef struct {
@@ -194,21 +140,21 @@ typedef struct {
 } interrupt_wait_t;
 
 typedef struct {
-	int size;
-	int addr;
-	union {
-		unsigned char byte;
-		unsigned short word;
-		unsigned int dword; 	/* not strict C, but if not can have problems */
-	} val;
+    int size;
+    int addr;
+    union {
+        unsigned char byte;
+        unsigned short word;
+        unsigned int dword; 	/* not strict C, but if not can have problems */
+    } val;
 } pci_cfg_cmd;
 
 /* ioctl interface */
 /* See documentation for a detailed usage explanation */
 
-/* 
+/*
  * one of the problems of ioctl, is that requires a type definition.
- * This type is only 8-bits wide, and half-documented in 
+ * This type is only 8-bits wide, and half-documented in
  * <linux-src>/Documentation/ioctl-number.txt.
  * previous SHL -> 'S' definition, conflicts with several devices,
  * so I changed it to be pci -> 'p', in the range 0xA0-BF
diff --git a/driver/rdma.c b/driver/rdma.c
index 78c6d69..c08eef9 100644
--- a/driver/rdma.c
+++ b/driver/rdma.c
@@ -22,26 +22,26 @@ static unsigned long pcidriver_follow_pte(struct mm_struct *mm, unsigned long ad
     pmd_t *pmd;
     pte_t *pte;
 
-    spinlock_t *ptl; 
+    spinlock_t *ptl;
     unsigned long pfn = 0;
 
 
     pgd = pgd_offset(mm, address);
-    if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd))) 
-	return 0;
-        
+    if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd)))
+        return 0;
+
     pud = pud_offset(pgd, address);
-    if (pud_none(*pud) || unlikely(pud_bad(*pud)))     
-	return 0;
+    if (pud_none(*pud) || unlikely(pud_bad(*pud)))
+        return 0;
 
     pmd = pmd_offset(pud, address);
-    if (pmd_none(*pmd)) 
-	return 0;
+    if (pmd_none(*pmd))
+        return 0;
 
     pte = pte_offset_map_lock(mm, pmd, address, &ptl);
     if (!pte_none(*pte))
-	pfn = (pte_pfn(*pte) << PAGE_SHIFT);
-    pte_unmap_unlock(pte, ptl); 
+        pfn = (pte_pfn(*pte) << PAGE_SHIFT);
+    pte_unmap_unlock(pte, ptl);
 
     return pfn;
 }
diff --git a/driver/sysfs.c b/driver/sysfs.c
index abc1c8a..19865fc 100644
--- a/driver/sysfs.c
+++ b/driver/sysfs.c
@@ -35,46 +35,40 @@ static SYSFS_GET_FUNCTION(pcidriver_show_umem_entry);
  *
  */
 static int _pcidriver_sysfs_initialize(pcidriver_privdata_t *privdata,
-					int id,
-					struct class_device_attribute *sysfs_attr,
-					const char *fmtstring,
-					SYSFS_GET_FUNCTION((*callback)))
+                                       int id,
+                                       struct class_device_attribute *sysfs_attr,
+                                       const char *fmtstring,
+                                       SYSFS_GET_FUNCTION((*callback)))
 {
-	/* sysfs attributes for kmem buffers don’t make sense before 2.6.13, as
-	   we have no mmap support before */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
-	char namebuffer[16];
+    /* sysfs attributes for kmem buffers don’t make sense before 2.6.13, as
+       we have no mmap support before */
+    char namebuffer[16];
 
-	/* allocate space for the name of the attribute */
-	snprintf(namebuffer, sizeof(namebuffer), fmtstring, id);
+    /* allocate space for the name of the attribute */
+    snprintf(namebuffer, sizeof(namebuffer), fmtstring, id);
 
-	if ((sysfs_attr->attr.name = kstrdup(namebuffer, GFP_KERNEL)) == NULL)
-		return -ENOMEM;
+    if ((sysfs_attr->attr.name = kstrdup(namebuffer, GFP_KERNEL)) == NULL)
+        return -ENOMEM;
 
-	sysfs_attr->attr.mode = S_IRUGO;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
-	    // DS: Shall we lock now while accessing driver data structures???
-	sysfs_attr->attr.owner = THIS_MODULE;
-#endif
-	sysfs_attr->show = callback;
-	sysfs_attr->store = NULL;
-			
-	/* name and add attribute */
-	if (class_device_create_file(privdata->class_dev, sysfs_attr) != 0)
-		return -ENXIO; /* Device not configured. Not the really best choice, but hm. */
-#endif
+    sysfs_attr->attr.mode = S_IRUGO;
+    sysfs_attr->show = callback;
+    sysfs_attr->store = NULL;
 
-	return 0;
+    /* name and add attribute */
+    if (class_device_create_file(privdata->class_dev, sysfs_attr) != 0)
+        return -ENXIO; /* Device not configured. Not the really best choice, but hm. */
+
+    return 0;
 }
 
 int pcidriver_sysfs_initialize_kmem(pcidriver_privdata_t *privdata, int id, struct class_device_attribute *sysfs_attr)
 {
-	return _pcidriver_sysfs_initialize(privdata, id, sysfs_attr, "kbuf%d", pcidriver_show_kmem_entry);
+    return _pcidriver_sysfs_initialize(privdata, id, sysfs_attr, "kbuf%d", pcidriver_show_kmem_entry);
 }
 
 int pcidriver_sysfs_initialize_umem(pcidriver_privdata_t *privdata, int id, struct class_device_attribute *sysfs_attr)
 {
-	return _pcidriver_sysfs_initialize(privdata, id, sysfs_attr, "umem%d", pcidriver_show_umem_entry);
+    return _pcidriver_sysfs_initialize(privdata, id, sysfs_attr, "umem%d", pcidriver_show_umem_entry);
 }
 
 /**
@@ -84,225 +78,210 @@ int pcidriver_sysfs_initialize_umem(pcidriver_privdata_t *privdata, int id, stru
  */
 void pcidriver_sysfs_remove(pcidriver_privdata_t *privdata, struct class_device_attribute *sysfs_attr)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
-	class_device_remove_file(privdata->class_dev, sysfs_attr);
-	kfree(sysfs_attr->attr.name);
-#endif
+    class_device_remove_file(privdata->class_dev, sysfs_attr);
+    kfree(sysfs_attr->attr.name);
 }
 
 static SYSFS_GET_FUNCTION(pcidriver_show_kmem_entry)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
-
-        /* As we can be sure that attr.name contains a filename which we
-         * created (see _pcidriver_sysfs_initialize), we do not need to have
-         * sanity checks but can directly call simple_strtol() */
-        int id = simple_strtol(attr->attr.name + strlen("kbuf"), NULL, 10);
-	pcidriver_kmem_entry_t *entry = pcidriver_kmem_find_entry_id(privdata, id);
-	if (entry) {
-	    unsigned long addr = entry->cpua;
-	    unsigned long dma_addr = entry->dma_handle;
-	    
-	    if (entry->size >= 16) {
-		pcidriver_kmem_sync_entry(privdata, entry, PCILIB_KMEM_SYNC_FROMDEVICE);
-		return snprintf(buf, PAGE_SIZE, "buffer: %d\naddr: %lx\nhw addr: %llx\nbus addr: %lx\ntype: %lx\nuse: 0x%lx\nitem: %lu\nsize: %lu\nrefs: %lu\nhw ref: %i\nmode: 0x%lx\ndata: %8x %8x %8x %8x\n", id, addr, virt_to_phys((void*)addr), dma_addr, entry->type, entry->use, entry->item, entry->size, entry->refs&KMEM_REF_COUNT, (entry->refs&KMEM_REF_HW)?1:0, entry->mode, *(u32*)(entry->cpua), *(u32*)(entry->cpua + 4),  *(u32*)(entry->cpua + 8), *(u32*)(entry->cpua + 12));
-	    } else
-		return snprintf(buf, PAGE_SIZE, "buffer: %d\naddr: %lx\nhw addr: %llx\nbus addr: %lx\ntype: %lx\nuse: 0x%lx\nitem: %lu\nsize: %lu\nrefs: %lu\nhw ref: %i\nmode: 0x%lx\n", id, addr, virt_to_phys((void*)addr), dma_addr, entry->type, entry->use, entry->item, entry->size, entry->refs&KMEM_REF_COUNT, (entry->refs&KMEM_REF_HW)?1:0, entry->mode);
-	} else
-	    return snprintf(buf, PAGE_SIZE, "I am in the kmem_entry show function for buffer %d\n", id);
-#else
-	return 0;
-#endif
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+
+    /* As we can be sure that attr.name contains a filename which we
+     * created (see _pcidriver_sysfs_initialize), we do not need to have
+     * sanity checks but can directly call simple_strtol() */
+    int id = simple_strtol(attr->attr.name + strlen("kbuf"), NULL, 10);
+    pcidriver_kmem_entry_t *entry = pcidriver_kmem_find_entry_id(privdata, id);
+    if (entry) {
+        unsigned long addr = entry->cpua;
+        unsigned long dma_addr = entry->dma_handle;
+
+        if (entry->size >= 16) {
+            pcidriver_kmem_sync_entry(privdata, entry, PCILIB_KMEM_SYNC_FROMDEVICE);
+            return snprintf(buf, PAGE_SIZE, "buffer: %d\naddr: %lx\nhw addr: %llx\nbus addr: %lx\ntype: %lx\nuse: 0x%lx\nitem: %lu\nsize: %lu\nrefs: %lu\nhw ref: %i\nmode: 0x%lx\ndata: %8x %8x %8x %8x\n", id, addr, virt_to_phys((void*)addr), dma_addr, entry->type, entry->use, entry->item, entry->size, entry->refs&KMEM_REF_COUNT, (entry->refs&KMEM_REF_HW)?1:0, entry->mode, *(u32*)(entry->cpua), *(u32*)(entry->cpua + 4),  *(u32*)(entry->cpua + 8), *(u32*)(entry->cpua + 12));
+        } else
+            return snprintf(buf, PAGE_SIZE, "buffer: %d\naddr: %lx\nhw addr: %llx\nbus addr: %lx\ntype: %lx\nuse: 0x%lx\nitem: %lu\nsize: %lu\nrefs: %lu\nhw ref: %i\nmode: 0x%lx\n", id, addr, virt_to_phys((void*)addr), dma_addr, entry->type, entry->use, entry->item, entry->size, entry->refs&KMEM_REF_COUNT, (entry->refs&KMEM_REF_HW)?1:0, entry->mode);
+    } else
+        return snprintf(buf, PAGE_SIZE, "I am in the kmem_entry show function for buffer %d\n", id);
 }
 
 static SYSFS_GET_FUNCTION(pcidriver_show_umem_entry)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
-#if 0
-	pcidriver_privdata_t *privdata = (pcidriver_privdata_t *)cls->class_data;
-
-	return snprintf(buf, PAGE_SIZE, "I am in the umem_entry show function, class_device_kobj_name: %s\n", cls->kobj.name);
-#endif
-	return 0;
-#else
-	return 0;
-#endif
+    return 0;
 }
 
 #ifdef ENABLE_IRQ
 SYSFS_GET_FUNCTION(pcidriver_show_irq_count)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", privdata->irq_count);
+    return snprintf(buf, PAGE_SIZE, "%d\n", privdata->irq_count);
 }
 
 SYSFS_GET_FUNCTION(pcidriver_show_irq_queues)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
-	int i, offset;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    int i, offset;
 
-	/* output will be truncated to PAGE_SIZE */
-	offset = snprintf(buf, PAGE_SIZE, "Queue\tOutstanding IRQs\n");
-	for (i = 0; i < PCIDRIVER_INT_MAXSOURCES; i++)
-		offset += snprintf(buf+offset, PAGE_SIZE-offset, "%d\t%d\n", i, atomic_read(&(privdata->irq_outstanding[i])) );
+    /* output will be truncated to PAGE_SIZE */
+    offset = snprintf(buf, PAGE_SIZE, "Queue\tOutstanding IRQs\n");
+    for (i = 0; i < PCIDRIVER_INT_MAXSOURCES; i++)
+        offset += snprintf(buf+offset, PAGE_SIZE-offset, "%d\t%d\n", i, atomic_read(&(privdata->irq_outstanding[i])) );
 
-	return (offset > PAGE_SIZE ? PAGE_SIZE : offset+1);
+    return (offset > PAGE_SIZE ? PAGE_SIZE : offset+1);
 }
 #endif
 
 SYSFS_GET_FUNCTION(pcidriver_show_mmap_mode)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", privdata->mmap_mode);
+    return snprintf(buf, PAGE_SIZE, "%d\n", privdata->mmap_mode);
 }
 
 SYSFS_SET_FUNCTION(pcidriver_store_mmap_mode)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
-	int mode = -1;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    int mode = -1;
 
-	/* Set the mmap-mode if it is either PCIDRIVER_MMAP_PCI or PCIDRIVER_MMAP_KMEM */
-	if (sscanf(buf, "%d", &mode) == 1 &&
-	    (mode == PCIDRIVER_MMAP_PCI || mode == PCIDRIVER_MMAP_KMEM))
-		privdata->mmap_mode = mode;
+    /* Set the mmap-mode if it is either PCIDRIVER_MMAP_PCI or PCIDRIVER_MMAP_KMEM */
+    if (sscanf(buf, "%d", &mode) == 1 &&
+            (mode == PCIDRIVER_MMAP_PCI || mode == PCIDRIVER_MMAP_KMEM))
+        privdata->mmap_mode = mode;
 
-	return strlen(buf);
+    return strlen(buf);
 }
 
 SYSFS_GET_FUNCTION(pcidriver_show_mmap_area)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", privdata->mmap_area);
+    return snprintf(buf, PAGE_SIZE, "%d\n", privdata->mmap_area);
 }
 
 SYSFS_SET_FUNCTION(pcidriver_store_mmap_area)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
-	int temp = -1;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    int temp = -1;
 
-	sscanf(buf, "%d", &temp);
+    sscanf(buf, "%d", &temp);
 
-	if ((temp >= PCIDRIVER_BAR0) && (temp <= PCIDRIVER_BAR5))
-		privdata->mmap_area = temp;
+    if ((temp >= PCIDRIVER_BAR0) && (temp <= PCIDRIVER_BAR5))
+        privdata->mmap_area = temp;
 
-	return strlen(buf);
+    return strlen(buf);
 }
 
 SYSFS_GET_FUNCTION(pcidriver_show_kmem_count)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&(privdata->kmem_count)));
+    return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&(privdata->kmem_count)));
 }
 
 SYSFS_SET_FUNCTION(pcidriver_store_kmem_alloc)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
-	kmem_handle_t kmem_handle;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    kmem_handle_t kmem_handle;
 
-	/* FIXME: guillermo: is validation of parsing an unsigned int enough? */
-	if (sscanf(buf, "%lu", &kmem_handle.size) == 1)
-		pcidriver_kmem_alloc(privdata, &kmem_handle);
+    /* FIXME: guillermo: is validation of parsing an unsigned int enough? */
+    if (sscanf(buf, "%lu", &kmem_handle.size) == 1)
+        pcidriver_kmem_alloc(privdata, &kmem_handle);
 
-	return strlen(buf);
+    return strlen(buf);
 }
 
 SYSFS_SET_FUNCTION(pcidriver_store_kmem_free)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
-	unsigned int id;
-	pcidriver_kmem_entry_t *kmem_entry;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    unsigned int id;
+    pcidriver_kmem_entry_t *kmem_entry;
 
-	/* Parse the ID of the kernel memory to be freed, check bounds */
-	if (sscanf(buf, "%u", &id) != 1 ||
-	    (id >= atomic_read(&(privdata->kmem_count))))
-		goto err;
+    /* Parse the ID of the kernel memory to be freed, check bounds */
+    if (sscanf(buf, "%u", &id) != 1 ||
+            (id >= atomic_read(&(privdata->kmem_count))))
+        goto err;
 
-	if ((kmem_entry = pcidriver_kmem_find_entry_id(privdata,id)) == NULL)
-		goto err;
+    if ((kmem_entry = pcidriver_kmem_find_entry_id(privdata,id)) == NULL)
+        goto err;
 
-	pcidriver_kmem_free_entry(privdata, kmem_entry );
+    pcidriver_kmem_free_entry(privdata, kmem_entry );
 err:
-	return strlen(buf);
+    return strlen(buf);
 }
 
 SYSFS_GET_FUNCTION(pcidriver_show_kbuffers)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
-	int offset = 0;
-	struct list_head *ptr;
-	pcidriver_kmem_entry_t *entry;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    int offset = 0;
+    struct list_head *ptr;
+    pcidriver_kmem_entry_t *entry;
 
-	/* print the header */
-	offset += snprintf(buf, PAGE_SIZE, "kbuf#\tcpu addr\tsize\n");
+    /* print the header */
+    offset += snprintf(buf, PAGE_SIZE, "kbuf#\tcpu addr\tsize\n");
 
-	spin_lock(&(privdata->kmemlist_lock));
-	list_for_each(ptr, &(privdata->kmem_list)) {
-		entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
+    spin_lock(&(privdata->kmemlist_lock));
+    list_for_each(ptr, &(privdata->kmem_list)) {
+        entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
 
-		/* print entry info */
-		if (offset > PAGE_SIZE) {
-			spin_unlock( &(privdata->kmemlist_lock) );
-			return PAGE_SIZE;
-		}
+        /* print entry info */
+        if (offset > PAGE_SIZE) {
+            spin_unlock( &(privdata->kmemlist_lock) );
+            return PAGE_SIZE;
+        }
 
-		offset += snprintf(buf+offset, PAGE_SIZE-offset, "%3d\t%08lx\t%lu\n", entry->id, (unsigned long)(entry->dma_handle), entry->size );
-	}
+        offset += snprintf(buf+offset, PAGE_SIZE-offset, "%3d\t%08lx\t%lu\n", entry->id, (unsigned long)(entry->dma_handle), entry->size );
+    }
 
-	spin_unlock(&(privdata->kmemlist_lock));
+    spin_unlock(&(privdata->kmemlist_lock));
 
-	/* output will be truncated to PAGE_SIZE */
-	return (offset > PAGE_SIZE ? PAGE_SIZE : offset+1);
+    /* output will be truncated to PAGE_SIZE */
+    return (offset > PAGE_SIZE ? PAGE_SIZE : offset+1);
 }
 
 SYSFS_GET_FUNCTION(pcidriver_show_umappings)
 {
-	int offset = 0;
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
-	struct list_head *ptr;
-	pcidriver_umem_entry_t *entry;
+    int offset = 0;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    struct list_head *ptr;
+    pcidriver_umem_entry_t *entry;
 
-	/* print the header */
-	offset += snprintf(buf, PAGE_SIZE, "umap#\tn_pages\tsg_ents\n");
+    /* print the header */
+    offset += snprintf(buf, PAGE_SIZE, "umap#\tn_pages\tsg_ents\n");
 
-	spin_lock( &(privdata->umemlist_lock) );
-	list_for_each( ptr, &(privdata->umem_list) ) {
-		entry = list_entry(ptr, pcidriver_umem_entry_t, list );
+    spin_lock( &(privdata->umemlist_lock) );
+    list_for_each( ptr, &(privdata->umem_list) ) {
+        entry = list_entry(ptr, pcidriver_umem_entry_t, list );
 
-		/* print entry info */
-		if (offset > PAGE_SIZE) {
-			spin_unlock( &(privdata->umemlist_lock) );
-			return PAGE_SIZE;
-		}
+        /* print entry info */
+        if (offset > PAGE_SIZE) {
+            spin_unlock( &(privdata->umemlist_lock) );
+            return PAGE_SIZE;
+        }
 
-		offset += snprintf(buf+offset, PAGE_SIZE-offset, "%3d\t%lu\t%lu\n", entry->id,
-				(unsigned long)(entry->nr_pages), (unsigned long)(entry->nents));
-	}
+        offset += snprintf(buf+offset, PAGE_SIZE-offset, "%3d\t%lu\t%lu\n", entry->id,
+                           (unsigned long)(entry->nr_pages), (unsigned long)(entry->nents));
+    }
 
-	spin_unlock( &(privdata->umemlist_lock) );
+    spin_unlock( &(privdata->umemlist_lock) );
 
-	/* output will be truncated to PAGE_SIZE */
-	return (offset > PAGE_SIZE ? PAGE_SIZE : offset+1);
+    /* output will be truncated to PAGE_SIZE */
+    return (offset > PAGE_SIZE ? PAGE_SIZE : offset+1);
 }
 
 SYSFS_SET_FUNCTION(pcidriver_store_umem_unmap)
 {
-	pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
-	pcidriver_umem_entry_t *umem_entry;
-	unsigned int id;
+    pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
+    pcidriver_umem_entry_t *umem_entry;
+    unsigned int id;
 
-	if (sscanf(buf, "%u", &id) != 1 ||
-	    (id >= atomic_read(&(privdata->umem_count))))
-		goto err;
+    if (sscanf(buf, "%u", &id) != 1 ||
+            (id >= atomic_read(&(privdata->umem_count))))
+        goto err;
 
-	if ((umem_entry = pcidriver_umem_find_entry_id(privdata, id)) == NULL)
-		goto err;
+    if ((umem_entry = pcidriver_umem_find_entry_id(privdata, id)) == NULL)
+        goto err;
 
-	pcidriver_umem_sgunmap(privdata, umem_entry);
+    pcidriver_umem_sgunmap(privdata, umem_entry);
 err:
-	return strlen(buf);
+    return strlen(buf);
 }
diff --git a/driver/umem.c b/driver/umem.c
index 7a8dcc1..bb9af1e 100644
--- a/driver/umem.c
+++ b/driver/umem.c
@@ -32,153 +32,153 @@
  */
 int pcidriver_umem_sgmap(pcidriver_privdata_t *privdata, umem_handle_t *umem_handle)
 {
-	int i, res, nr_pages;
-	struct page **pages;
-	struct scatterlist *sg = NULL;
-	pcidriver_umem_entry_t *umem_entry;
-	unsigned int nents;
-	unsigned long count,offset,length;
-
-	/*
-	 * We do some checks first. Then, the following is necessary to create a
-	 * Scatter/Gather list from a user memory area:
-	 *  - Determine the number of pages
-	 *  - Get the pages for the memory area
-	 * 	- Lock them.
-	 *  - Create a scatter/gather list of the pages
-	 *  - Map the list from memory to PCI bus addresses
-	 *
-	 * Then, we:
-	 *  - Create an entry on the umem list of the device, to cache the mapping.
-	 *  - Create a sysfs attribute that gives easy access to the SG list
-	 */
-
-	/* zero-size?? */
-	if (umem_handle->size == 0)
-		return -EINVAL;
-
-	/* Direction is better ignoring during mapping. */
-	/* We assume bidirectional buffers always, except when sync'ing */
-
-	/* calculate the number of pages */
-	nr_pages = ((umem_handle->vma & ~PAGE_MASK) + umem_handle->size + ~PAGE_MASK) >> PAGE_SHIFT;
-
-	mod_info_dbg("nr_pages computed: %u\n", nr_pages);
-
-	/* Allocate space for the page information */
-	/* This can be very big, so we use vmalloc */
-	if ((pages = vmalloc(nr_pages * sizeof(*pages))) == NULL)
-		return -ENOMEM;
-
-	mod_info_dbg("allocated space for the pages.\n");
-
-	/* Allocate space for the scatterlist */
-	/* We do not know how many entries will be, but the maximum is nr_pages. */
-	/* This can be very big, so we use vmalloc */
-	if ((sg = vmalloc(nr_pages * sizeof(*sg))) == NULL)
-		goto umem_sgmap_pages;
-
-	sg_init_table(sg, nr_pages);
-
-	mod_info_dbg("allocated space for the SG list.\n");
-
-	/* Get the page information */
-	down_read(&current->mm->mmap_sem);
-	res = get_user_pages(
-				current,
-				current->mm,
-				umem_handle->vma,
-				nr_pages,
-				1,
-				0,  /* do not force, FIXME: shall I? */
-				pages,
-				NULL );
-	up_read(&current->mm->mmap_sem);
-
-	/* Error, not all pages mapped */
-	if (res < (int)nr_pages) {
-		mod_info("Could not map all user pages (%d of %d)\n", res, nr_pages);
-		/* If only some pages could be mapped, we release those. If a real
-		 * error occured, we set nr_pages to 0 */
-		nr_pages = (res > 0 ? res : 0);
-		goto umem_sgmap_unmap;
-	}
-
-	mod_info_dbg("Got the pages (%d).\n", res);
-
-	/* Lock the pages, then populate the SG list with the pages */
-	/* page0 is different */
-	if ( !PageReserved(pages[0]) )
-		compat_lock_page(pages[0]);
-
-	offset = (umem_handle->vma & ~PAGE_MASK);
-	length = (umem_handle->size > (PAGE_SIZE-offset) ? (PAGE_SIZE-offset) : umem_handle->size);
-
-	sg_set_page(&sg[0], pages[0], length, offset);
-
-	count = umem_handle->size - length;
-	for(i=1;i<nr_pages;i++) {
-		/* Lock page first */
-		if ( !PageReserved(pages[i]) )
-			compat_lock_page(pages[i]);
-
-		/* Populate the list */
-		sg_set_page(&sg[i], pages[i], ((count > PAGE_SIZE) ? PAGE_SIZE : count), 0);
-		count -= sg[i].length;
-	}
-
-	/* Use the page list to populate the SG list */
-	/* SG entries may be merged, res is the number of used entries */
-	/* We have originally nr_pages entries in the sg list */
-	if ((nents = pci_map_sg(privdata->pdev, sg, nr_pages, PCI_DMA_BIDIRECTIONAL)) == 0)
-		goto umem_sgmap_unmap;
-
-	mod_info_dbg("Mapped SG list (%d entries).\n", nents);
-
-	/* Add an entry to the umem_list of the device, and update the handle with the id */
-	/* Allocate space for the new umem entry */
-	if ((umem_entry = kmalloc(sizeof(*umem_entry), GFP_KERNEL)) == NULL)
-		goto umem_sgmap_entry;
-
-	/* Fill entry to be added to the umem list */
-	umem_entry->id = atomic_inc_return(&privdata->umem_count) - 1;
-	umem_entry->nr_pages = nr_pages;	/* Will be needed when unmapping */
-	umem_entry->pages = pages;
-	umem_entry->nents = nents;
-	umem_entry->sg = sg;
-
-	if (pcidriver_sysfs_initialize_umem(privdata, umem_entry->id, &(umem_entry->sysfs_attr)) != 0)
-		goto umem_sgmap_name_fail;
-
-	/* Add entry to the umem list */
-	spin_lock( &(privdata->umemlist_lock) );
-	list_add_tail( &(umem_entry->list), &(privdata->umem_list) );
-	spin_unlock( &(privdata->umemlist_lock) );
-
-	/* Update the Handle with the Handle ID of the entry */
-	umem_handle->handle_id = umem_entry->id;
-
-	return 0;
+    int i, res, nr_pages;
+    struct page **pages;
+    struct scatterlist *sg = NULL;
+    pcidriver_umem_entry_t *umem_entry;
+    unsigned int nents;
+    unsigned long count,offset,length;
+
+    /*
+     * We do some checks first. Then, the following is necessary to create a
+     * Scatter/Gather list from a user memory area:
+     *  - Determine the number of pages
+     *  - Get the pages for the memory area
+     * 	- Lock them.
+     *  - Create a scatter/gather list of the pages
+     *  - Map the list from memory to PCI bus addresses
+     *
+     * Then, we:
+     *  - Create an entry on the umem list of the device, to cache the mapping.
+     *  - Create a sysfs attribute that gives easy access to the SG list
+     */
+
+    /* zero-size?? */
+    if (umem_handle->size == 0)
+        return -EINVAL;
+
+    /* Direction is better ignoring during mapping. */
+    /* We assume bidirectional buffers always, except when sync'ing */
+
+    /* calculate the number of pages */
+    nr_pages = ((umem_handle->vma & ~PAGE_MASK) + umem_handle->size + ~PAGE_MASK) >> PAGE_SHIFT;
+
+    mod_info_dbg("nr_pages computed: %u\n", nr_pages);
+
+    /* Allocate space for the page information */
+    /* This can be very big, so we use vmalloc */
+    if ((pages = vmalloc(nr_pages * sizeof(*pages))) == NULL)
+        return -ENOMEM;
+
+    mod_info_dbg("allocated space for the pages.\n");
+
+    /* Allocate space for the scatterlist */
+    /* We do not know how many entries will be, but the maximum is nr_pages. */
+    /* This can be very big, so we use vmalloc */
+    if ((sg = vmalloc(nr_pages * sizeof(*sg))) == NULL)
+        goto umem_sgmap_pages;
+
+    sg_init_table(sg, nr_pages);
+
+    mod_info_dbg("allocated space for the SG list.\n");
+
+    /* Get the page information */
+    down_read(&current->mm->mmap_sem);
+    res = get_user_pages(
+              current,
+              current->mm,
+              umem_handle->vma,
+              nr_pages,
+              1,
+              0,  /* do not force, FIXME: shall I? */
+              pages,
+              NULL );
+    up_read(&current->mm->mmap_sem);
+
+    /* Error, not all pages mapped */
+    if (res < (int)nr_pages) {
+        mod_info("Could not map all user pages (%d of %d)\n", res, nr_pages);
+        /* If only some pages could be mapped, we release those. If a real
+         * error occured, we set nr_pages to 0 */
+        nr_pages = (res > 0 ? res : 0);
+        goto umem_sgmap_unmap;
+    }
+
+    mod_info_dbg("Got the pages (%d).\n", res);
+
+    /* Lock the pages, then populate the SG list with the pages */
+    /* page0 is different */
+    if ( !PageReserved(pages[0]) )
+        compat_lock_page(pages[0]);
+
+    offset = (umem_handle->vma & ~PAGE_MASK);
+    length = (umem_handle->size > (PAGE_SIZE-offset) ? (PAGE_SIZE-offset) : umem_handle->size);
+
+    sg_set_page(&sg[0], pages[0], length, offset);
+
+    count = umem_handle->size - length;
+    for(i=1; i<nr_pages; i++) {
+        /* Lock page first */
+        if ( !PageReserved(pages[i]) )
+            compat_lock_page(pages[i]);
+
+        /* Populate the list */
+        sg_set_page(&sg[i], pages[i], ((count > PAGE_SIZE) ? PAGE_SIZE : count), 0);
+        count -= sg[i].length;
+    }
+
+    /* Use the page list to populate the SG list */
+    /* SG entries may be merged, res is the number of used entries */
+    /* We have originally nr_pages entries in the sg list */
+    if ((nents = pci_map_sg(privdata->pdev, sg, nr_pages, PCI_DMA_BIDIRECTIONAL)) == 0)
+        goto umem_sgmap_unmap;
+
+    mod_info_dbg("Mapped SG list (%d entries).\n", nents);
+
+    /* Add an entry to the umem_list of the device, and update the handle with the id */
+    /* Allocate space for the new umem entry */
+    if ((umem_entry = kmalloc(sizeof(*umem_entry), GFP_KERNEL)) == NULL)
+        goto umem_sgmap_entry;
+
+    /* Fill entry to be added to the umem list */
+    umem_entry->id = atomic_inc_return(&privdata->umem_count) - 1;
+    umem_entry->nr_pages = nr_pages;	/* Will be needed when unmapping */
+    umem_entry->pages = pages;
+    umem_entry->nents = nents;
+    umem_entry->sg = sg;
+
+    if (pcidriver_sysfs_initialize_umem(privdata, umem_entry->id, &(umem_entry->sysfs_attr)) != 0)
+        goto umem_sgmap_name_fail;
+
+    /* Add entry to the umem list */
+    spin_lock( &(privdata->umemlist_lock) );
+    list_add_tail( &(umem_entry->list), &(privdata->umem_list) );
+    spin_unlock( &(privdata->umemlist_lock) );
+
+    /* Update the Handle with the Handle ID of the entry */
+    umem_handle->handle_id = umem_entry->id;
+
+    return 0;
 
 umem_sgmap_name_fail:
-	kfree(umem_entry);
+    kfree(umem_entry);
 umem_sgmap_entry:
-	pci_unmap_sg( privdata->pdev, sg, nr_pages, PCI_DMA_BIDIRECTIONAL );
+    pci_unmap_sg( privdata->pdev, sg, nr_pages, PCI_DMA_BIDIRECTIONAL );
 umem_sgmap_unmap:
-	/* release pages */
-	if (nr_pages > 0) {
-		for(i=0;i<nr_pages;i++) {
-			if (PageLocked(pages[i]))
-				compat_unlock_page(pages[i]);
-			if (!PageReserved(pages[i]))
-				set_page_dirty(pages[i]);
-			page_cache_release(pages[i]);
-		}
-	}
-	vfree(sg);
+    /* release pages */
+    if (nr_pages > 0) {
+        for(i=0; i<nr_pages; i++) {
+            if (PageLocked(pages[i]))
+                compat_unlock_page(pages[i]);
+            if (!PageReserved(pages[i]))
+                set_page_dirty(pages[i]);
+            page_cache_release(pages[i]);
+        }
+    }
+    vfree(sg);
 umem_sgmap_pages:
-	vfree(pages);
-	return -ENOMEM;
+    vfree(pages);
+    return -ENOMEM;
 
 }
 
@@ -189,39 +189,39 @@ umem_sgmap_pages:
  */
 int pcidriver_umem_sgunmap(pcidriver_privdata_t *privdata, pcidriver_umem_entry_t *umem_entry)
 {
-	int i;
-	pcidriver_sysfs_remove(privdata, &(umem_entry->sysfs_attr));
-
-	/* Unmap user memory */
-	pci_unmap_sg( privdata->pdev, umem_entry->sg, umem_entry->nr_pages, PCI_DMA_BIDIRECTIONAL );
-
-	/* Release the pages */
-	if (umem_entry->nr_pages > 0) {
-		for(i=0;i<(umem_entry->nr_pages);i++) {
-			/* Mark pages as Dirty and unlock it */
-			if ( !PageReserved( umem_entry->pages[i] )) {
-				SetPageDirty( umem_entry->pages[i] );
-				compat_unlock_page(umem_entry->pages[i]);
-			}
-			/* and release it from the cache */
-			page_cache_release( umem_entry->pages[i] );
-		}
-	}
-
-	/* Remove the umem list entry */
-	spin_lock( &(privdata->umemlist_lock) );
-	list_del( &(umem_entry->list) );
-	spin_unlock( &(privdata->umemlist_lock) );
-
-	/* Release SG list and page list memory */
-	/* These two are in the vm area of the kernel */
-	vfree(umem_entry->pages);
-	vfree(umem_entry->sg);
-
-	/* Release umem_entry memory */
-	kfree(umem_entry);
-
-	return 0;
+    int i;
+    pcidriver_sysfs_remove(privdata, &(umem_entry->sysfs_attr));
+
+    /* Unmap user memory */
+    pci_unmap_sg( privdata->pdev, umem_entry->sg, umem_entry->nr_pages, PCI_DMA_BIDIRECTIONAL );
+
+    /* Release the pages */
+    if (umem_entry->nr_pages > 0) {
+        for(i=0; i<(umem_entry->nr_pages); i++) {
+            /* Mark pages as Dirty and unlock it */
+            if ( !PageReserved( umem_entry->pages[i] )) {
+                SetPageDirty( umem_entry->pages[i] );
+                compat_unlock_page(umem_entry->pages[i]);
+            }
+            /* and release it from the cache */
+            page_cache_release( umem_entry->pages[i] );
+        }
+    }
+
+    /* Remove the umem list entry */
+    spin_lock( &(privdata->umemlist_lock) );
+    list_del( &(umem_entry->list) );
+    spin_unlock( &(privdata->umemlist_lock) );
+
+    /* Release SG list and page list memory */
+    /* These two are in the vm area of the kernel */
+    vfree(umem_entry->pages);
+    vfree(umem_entry->sg);
+
+    /* Release umem_entry memory */
+    kfree(umem_entry);
+
+    return 0;
 }
 
 /**
@@ -231,16 +231,16 @@ int pcidriver_umem_sgunmap(pcidriver_privdata_t *privdata, pcidriver_umem_entry_
  */
 int pcidriver_umem_sgunmap_all(pcidriver_privdata_t *privdata)
 {
-	struct list_head *ptr, *next;
-	pcidriver_umem_entry_t *umem_entry;
+    struct list_head *ptr, *next;
+    pcidriver_umem_entry_t *umem_entry;
 
-	/* iterate safely over the entries and delete them */
-	list_for_each_safe( ptr, next, &(privdata->umem_list) ) {
-		umem_entry = list_entry(ptr, pcidriver_umem_entry_t, list );
-		pcidriver_umem_sgunmap( privdata, umem_entry ); 		/* spin lock inside! */
-	}
+    /* iterate safely over the entries and delete them */
+    list_for_each_safe( ptr, next, &(privdata->umem_list) ) {
+        umem_entry = list_entry(ptr, pcidriver_umem_entry_t, list );
+        pcidriver_umem_sgunmap( privdata, umem_entry ); 		/* spin lock inside! */
+    }
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -250,117 +250,68 @@ int pcidriver_umem_sgunmap_all(pcidriver_privdata_t *privdata)
  */
 int pcidriver_umem_sgget(pcidriver_privdata_t *privdata, umem_sglist_t *umem_sglist)
 {
-	int i;
-	pcidriver_umem_entry_t *umem_entry;
-	struct scatterlist *sg;
-	int idx = 0;
-	dma_addr_t cur_addr;
-	unsigned int cur_size;
-
-	/* Find the associated umem_entry for this buffer */
-	umem_entry = pcidriver_umem_find_entry_id( privdata, umem_sglist->handle_id );
-	if (umem_entry == NULL)
-		return -EINVAL;					/* umem_handle is not valid */
-
-	/* Check if passed SG list is enough */
-	if (umem_sglist->nents < umem_entry->nents)
-		return -EINVAL;					/* sg has not enough entries */
-
-	/* Copy the SG list to the user format */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
-	if (umem_sglist->type == PCIDRIVER_SG_MERGED) {
-		for_each_sg(umem_entry->sg, sg, umem_entry->nents, i ) {
-			if (i==0) {
-				umem_sglist->sg[0].addr = sg_dma_address( sg );
-				umem_sglist->sg[0].size = sg_dma_len( sg );
-				idx = 0;
-			}
-			else {
-				cur_addr = sg_dma_address( sg );
-				cur_size = sg_dma_len( sg );
-
-				/* Check if entry fits after current entry */
-				if (cur_addr == (umem_sglist->sg[idx].addr + umem_sglist->sg[idx].size)) {
-					umem_sglist->sg[idx].size += cur_size;
-					continue;
-				}
-
-				/* Skip if the entry is zero-length (yes, it can happen.... at the end of the list) */
-				if (cur_size == 0)
-					continue;
-
-				/* None of the above, add new entry */
-				idx++;
-				umem_sglist->sg[idx].addr = cur_addr;
-				umem_sglist->sg[idx].size = cur_size;
-			}
-		}
-		/* Set the used size of the SG list */
-		umem_sglist->nents = idx+1;
-	} else {
-		for_each_sg(umem_entry->sg, sg, umem_entry->nents, i ) {
-			mod_info("entry: %d\n",i);
-			umem_sglist->sg[i].addr = sg_dma_address( sg );
-			umem_sglist->sg[i].size = sg_dma_len( sg );
-		}
-
-		/* Set the used size of the SG list */
-		/* Check if the last one is zero-length */
-		if ( umem_sglist->sg[ umem_entry->nents - 1].size == 0)
-			umem_sglist->nents = umem_entry->nents -1;
-		else
-			umem_sglist->nents = umem_entry->nents;
-	}
-#else
-	if (umem_sglist->type == PCIDRIVER_SG_MERGED) {
-		/* Merge entries that are contiguous into a single entry */
-		/* Non-optimal but fast for most cases */
-		/* First one always true */
-		sg=umem_entry->sg;
-		umem_sglist->sg[0].addr = sg_dma_address( sg );
-		umem_sglist->sg[0].size = sg_dma_len( sg );
-		sg++;
-		idx = 0;
-
-		/* Iterate over the SG entries */
-		for(i=1; i< umem_entry->nents; i++, sg++ ) {
-			cur_addr = sg_dma_address( sg );
-			cur_size = sg_dma_len( sg );
-
-			/* Check if entry fits after current entry */
-			if (cur_addr == (umem_sglist->sg[idx].addr + umem_sglist->sg[idx].size)) {
-				umem_sglist->sg[idx].size += cur_size;
-				continue;
-			}
-
-			/* Skip if the entry is zero-length (yes, it can happen.... at the end of the list) */
-			if (cur_size == 0)
-				continue;
-
-			/* None of the above, add new entry */
-			idx++;
-			umem_sglist->sg[idx].addr = cur_addr;
-			umem_sglist->sg[idx].size = cur_size;
-		}
-		/* Set the used size of the SG list */
-		umem_sglist->nents = idx+1;
-	} else {
-		/* Assume pci_map_sg made a good job (ehem..) and just copy it.
-		 * actually, now I assume it just gives them plainly to me. */
-		for(i=0, sg=umem_entry->sg ; i< umem_entry->nents; i++, sg++ ) {
-			umem_sglist->sg[i].addr = sg_dma_address( sg );
-			umem_sglist->sg[i].size = sg_dma_len( sg );
-		}
-		/* Set the used size of the SG list */
-		/* Check if the last one is zero-length */
-		if ( umem_sglist->sg[ umem_entry->nents - 1].size == 0)
-			umem_sglist->nents = umem_entry->nents -1;
-		else
-			umem_sglist->nents = umem_entry->nents;
-	}
-#endif
-
-	return 0;
+    int i;
+    pcidriver_umem_entry_t *umem_entry;
+    struct scatterlist *sg;
+    int idx = 0;
+    dma_addr_t cur_addr;
+    unsigned int cur_size;
+
+    /* Find the associated umem_entry for this buffer */
+    umem_entry = pcidriver_umem_find_entry_id( privdata, umem_sglist->handle_id );
+    if (umem_entry == NULL)
+        return -EINVAL;					/* umem_handle is not valid */
+
+    /* Check if passed SG list is enough */
+    if (umem_sglist->nents < umem_entry->nents)
+        return -EINVAL;					/* sg has not enough entries */
+
+    /* Copy the SG list to the user format */
+    if (umem_sglist->type == PCIDRIVER_SG_MERGED) {
+        for_each_sg(umem_entry->sg, sg, umem_entry->nents, i ) {
+            if (i==0) {
+                umem_sglist->sg[0].addr = sg_dma_address( sg );
+                umem_sglist->sg[0].size = sg_dma_len( sg );
+                idx = 0;
+            }
+            else {
+                cur_addr = sg_dma_address( sg );
+                cur_size = sg_dma_len( sg );
+
+                /* Check if entry fits after current entry */
+                if (cur_addr == (umem_sglist->sg[idx].addr + umem_sglist->sg[idx].size)) {
+                    umem_sglist->sg[idx].size += cur_size;
+                    continue;
+                }
+
+                /* Skip if the entry is zero-length (yes, it can happen.... at the end of the list) */
+                if (cur_size == 0)
+                    continue;
+
+                /* None of the above, add new entry */
+                idx++;
+                umem_sglist->sg[idx].addr = cur_addr;
+                umem_sglist->sg[idx].size = cur_size;
+            }
+        }
+        /* Set the used size of the SG list */
+        umem_sglist->nents = idx+1;
+    } else {
+        for_each_sg(umem_entry->sg, sg, umem_entry->nents, i ) {
+            mod_info("entry: %d\n",i);
+            umem_sglist->sg[i].addr = sg_dma_address( sg );
+            umem_sglist->sg[i].size = sg_dma_len( sg );
+        }
+
+        /* Set the used size of the SG list */
+        /* Check if the last one is zero-length */
+        if ( umem_sglist->sg[ umem_entry->nents - 1].size == 0)
+            umem_sglist->nents = umem_entry->nents -1;
+        else
+            umem_sglist->nents = umem_entry->nents;
+    }
+
+    return 0;
 }
 
 /**
@@ -370,45 +321,29 @@ int pcidriver_umem_sgget(pcidriver_privdata_t *privdata, umem_sglist_t *umem_sgl
  */
 int pcidriver_umem_sync( pcidriver_privdata_t *privdata, umem_handle_t *umem_handle )
 {
-	pcidriver_umem_entry_t *umem_entry;
-
-	/* Find the associated umem_entry for this buffer */
-	umem_entry = pcidriver_umem_find_entry_id( privdata, umem_handle->handle_id );
-	if (umem_entry == NULL)
-		return -EINVAL;					/* umem_handle is not valid */
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,11)
-	switch (umem_handle->dir) {
-		case PCIDRIVER_DMA_TODEVICE:
-			pci_dma_sync_sg_for_device( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_TODEVICE );
-			break;
-		case PCIDRIVER_DMA_FROMDEVICE:
-			pci_dma_sync_sg_for_cpu( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_FROMDEVICE );
-			break;
-		case PCIDRIVER_DMA_BIDIRECTIONAL:
-			pci_dma_sync_sg_for_device( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_BIDIRECTIONAL );
-			pci_dma_sync_sg_for_cpu( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_BIDIRECTIONAL );
-			break;
-		default:
-			return -EINVAL;				/* wrong direction parameter */
-	}
-#else
-	switch (umem_handle->dir) {
-		case PCIDRIVER_DMA_TODEVICE:
-			pci_dma_sync_sg( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_TODEVICE );
-			break;
-		case PCIDRIVER_DMA_FROMDEVICE:
-			pci_dma_sync_sg( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_FROMDEVICE );
-			break;
-		case PCIDRIVER_DMA_BIDIRECTIONAL:
-			pci_dma_sync_sg( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_BIDIRECTIONAL );
-			break;
-		default:
-			return -EINVAL;				/* wrong direction parameter */
-	}
-#endif
-
-	return 0;
+    pcidriver_umem_entry_t *umem_entry;
+
+    /* Find the associated umem_entry for this buffer */
+    umem_entry = pcidriver_umem_find_entry_id( privdata, umem_handle->handle_id );
+    if (umem_entry == NULL)
+        return -EINVAL;					/* umem_handle is not valid */
+
+    switch (umem_handle->dir) {
+    case PCIDRIVER_DMA_TODEVICE:
+        pci_dma_sync_sg_for_device( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_TODEVICE );
+        break;
+    case PCIDRIVER_DMA_FROMDEVICE:
+        pci_dma_sync_sg_for_cpu( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_FROMDEVICE );
+        break;
+    case PCIDRIVER_DMA_BIDIRECTIONAL:
+        pci_dma_sync_sg_for_device( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_BIDIRECTIONAL );
+        pci_dma_sync_sg_for_cpu( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_BIDIRECTIONAL );
+        break;
+    default:
+        return -EINVAL;				/* wrong direction parameter */
+    }
+
+    return 0;
 }
 
 /*
@@ -420,19 +355,19 @@ int pcidriver_umem_sync( pcidriver_privdata_t *privdata, umem_handle_t *umem_han
  */
 pcidriver_umem_entry_t *pcidriver_umem_find_entry_id(pcidriver_privdata_t *privdata, int id)
 {
-	struct list_head *ptr;
-	pcidriver_umem_entry_t *entry;
+    struct list_head *ptr;
+    pcidriver_umem_entry_t *entry;
 
-	spin_lock(&(privdata->umemlist_lock));
-	list_for_each(ptr, &(privdata->umem_list)) {
-		entry = list_entry(ptr, pcidriver_umem_entry_t, list );
+    spin_lock(&(privdata->umemlist_lock));
+    list_for_each(ptr, &(privdata->umem_list)) {
+        entry = list_entry(ptr, pcidriver_umem_entry_t, list );
 
-		if (entry->id == id) {
-			spin_unlock( &(privdata->umemlist_lock) );
-			return entry;
-		}
-	}
+        if (entry->id == id) {
+            spin_unlock( &(privdata->umemlist_lock) );
+            return entry;
+        }
+    }
 
-	spin_unlock(&(privdata->umemlist_lock));
-	return NULL;
+    spin_unlock(&(privdata->umemlist_lock));
+    return NULL;
 }