From: Hans Verkuil <hans.verk...@cisco.com>
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.verk...@cisco.com>
Acked-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Cc: <sta...@vger.kernel.org> # for v4.15 and up
---
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 7ee3777cbe9c..3a1fca1440ac 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -968,6 +968,9 @@ 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. */
--
2.15.1
