From: Hans Verkuil hans.verkuil@cisco.com
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: Sasha Levin alexander.levin@microsoft.com --- drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c index a5f74a508f58..9e5807842dad 100644 --- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c +++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c @@ -943,6 +943,9 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar set_fs(old_fs); }
+ if (err == -ENOTTY) + return err; + /* Special case: even after an error we need to put the results back for these ioctls since the error_idx will contain information on which control failed. */