X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fuio%2Fuio.c;h=0a12e90ad41640d15c584cfd313fa9746563c2b3;hb=d28f87aa87ce8b196349d7c306a7e6fe3abd7155;hp=e8a01f264540e1cb9675eb821e0f3769c7a9667c;hpb=9ef64cb4320df821638b508f79aa8b858cca99f0;p=linux-2.6

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index e8a01f2645..0a12e90ad4 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -301,23 +301,33 @@ static int uio_open(struct inode *inode, struct file *filep)
 	if (!idev)
 		return -ENODEV;
 
+	if (!try_module_get(idev->owner))
+		return -ENODEV;
+
 	listener = kmalloc(sizeof(*listener), GFP_KERNEL);
-	if (!listener)
-		return -ENOMEM;
+	if (!listener) {
+		ret = -ENOMEM;
+		goto err_alloc_listener;
+	}
 
 	listener->dev = idev;
 	listener->event_count = atomic_read(&idev->event);
 	filep->private_data = listener;
 
 	if (idev->info->open) {
-		if (!try_module_get(idev->owner))
-			return -ENODEV;
 		ret = idev->info->open(idev->info, inode);
-		module_put(idev->owner);
+		if (ret)
+			goto err_infoopen;
 	}
 
-	if (ret)
-		kfree(listener);
+	return 0;
+
+err_infoopen:
+
+	kfree(listener);
+err_alloc_listener:
+
+	module_put(idev->owner);
 
 	return ret;
 }
@@ -336,12 +346,11 @@ static int uio_release(struct inode *inode, struct file *filep)
 	struct uio_listener *listener = filep->private_data;
 	struct uio_device *idev = listener->dev;
 
-	if (idev->info->release) {
-		if (!try_module_get(idev->owner))
-			return -ENODEV;
+	if (idev->info->release)
 		ret = idev->info->release(idev->info, inode);
-		module_put(idev->owner);
-	}
+
+	module_put(idev->owner);
+
 	if (filep->f_flags & FASYNC)
 		ret = uio_fasync(-1, filep, 0);
 	kfree(listener);
@@ -470,6 +479,8 @@ static int uio_mmap_physical(struct vm_area_struct *vma)
 
 	vma->vm_flags |= VM_IO | VM_RESERVED;
 
+	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
 	return remap_pfn_range(vma,
 			       vma->vm_start,
 			       idev->info->mem[mi].addr >> PAGE_SHIFT,
@@ -508,10 +519,7 @@ static int uio_mmap(struct file *filep, struct vm_area_struct *vma)
 		return -EINVAL;
 
 	if (idev->info->mmap) {
-		if (!try_module_get(idev->owner))
-			return -ENODEV;
 		ret = idev->info->mmap(idev->info, vma);
-		module_put(idev->owner);
 		return ret;
 	}
 
@@ -641,15 +649,14 @@ int __uio_register_device(struct module *owner,
 	if (ret)
 		goto err_get_minor;
 
-	idev->dev = device_create(uio_class->class, parent,
-				  MKDEV(uio_major, idev->minor),
-				  "uio%d", idev->minor);
+	idev->dev = device_create_drvdata(uio_class->class, parent,
+					  MKDEV(uio_major, idev->minor), idev,
+					  "uio%d", idev->minor);
 	if (IS_ERR(idev->dev)) {
 		printk(KERN_ERR "UIO: device register failed\n");
 		ret = PTR_ERR(idev->dev);
 		goto err_device_create;
 	}
-	dev_set_drvdata(idev->dev, idev);
 
 	ret = uio_dev_add_attributes(idev);
 	if (ret)