Programming Languages Research Group: Git - firefly-linux-kernel-4.4.55.git/commit

author	Michael S. Tsirkin <mst@redhat.com>
	Sun, 28 Feb 2016 14:31:39 +0000 (16:31 +0200)
committer	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
	Wed, 9 Mar 2016 23:34:50 +0000 (15:34 -0800)
commit	7931825da8fd57ceb8bae86d3dbe555a506a7edd
tree	6dda3fbb729623eaeb5f84f1d1c21e8b01e1465e	tree \| snapshot
parent	bbb3c5076be5c932609524db605e7911ecb95b47	commit \| diff

vfio: fix ioctl error handling

commit 8160c4e455820d5008a1116d2dca35f0363bb062 upstream.

Calling return copy_to_user(...) in an ioctl will not
do the right thing if there's a pagefault:
copy_to_user returns the number of bytes not copied
in this case.

Fix up vfio to do
return copy_to_user(...)) ?
-EFAULT : 0;

everywhere.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/vfio/pci/vfio_pci.c		diff \| blob \| history
drivers/vfio/platform/vfio_platform_common.c		diff \| blob \| history
drivers/vfio/vfio_iommu_type1.c		diff \| blob \| history