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vfio: fix crash on rmmod

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devtmpfs_delete_node() calls devnode() callback with mode==NULL but
vfio still tries to write there.

The patch fixes this.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alexey Kardashevskiy 2013-06-05 08:54:16 -06:00 committed by Alex Williamson
parent d683b96b07
commit 9a6aa279d3
1 changed files with 1 additions and 1 deletions
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drivers/vfio/vfio.c
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@ -1360,7 +1360,7 @@ static const struct file_operations vfio_device_fops = {
*/
static char *vfio_devnode(struct device *dev, umode_t *mode)
{
if (MINOR(dev->devt) == 0)
if (mode && (MINOR(dev->devt) == 0))
*mode = S_IRUGO | S_IWUGO;
return kasprintf(GFP_KERNEL, "vfio/%s", dev_name(dev));