tree 624ca03b148b98379963ff4e1d4df85f75f7e087
parent 81f70ba233d5f660e1ea5fe23260ee323af5d53a
author Michael S. Tsirkin <mst@redhat.com> 1456669899 +0200
committer Alex Williamson <alex.williamson@redhat.com> 1456670332 -0700

vfio: fix ioctl error handling

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.

Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>