media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors
authorHans Verkuil <hans.verkuil@cisco.com>
Wed, 14 Feb 2018 12:03:22 +0000 (13:03 +0100)
committerBen Hutchings <ben@decadent.org.uk>
Sat, 3 Mar 2018 15:51:07 +0000 (15:51 +0000)
commit d83a8243aaefe62ace433e4384a4f077bed86acb upstream.

Some ioctls need to copy back the result even if the ioctl returned
an error. However, don't do this for the error code -ENOTTY.
It makes no sense in that cases.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
drivers/media/video/v4l2-compat-ioctl32.c