Simplify locking in ioctl callbacks.
Signed-off-by: NDavid Ellingsworth <david@identd.dyndns.org>
Acked-by: NAlexey Klimov <klimov.linux@gmail.com>
Signed-off-by: NDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>