media: v4l2-ioctl.c: don't copy back the result for -ENOTTY

media: v4l2-ioctl.c: don't copy back the result for -ENOTTY

commit 181a4a2d5a0a7b43cab08a70710d727e7764ccdd upstream.

If the ioctl returned -ENOTTY, then don't bother copying
back the result as there is no point.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: <stable@vger.kernel.org>      # for v4.15 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[sw0312.kim: cherry-pick from linux-3.18.y to apply CVE patch]
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Change-Id: I74f89733fb3be9adb9ba8026be1dc699bed0445f