Patch "media: v4l2-ioctl.c: don't copy back the result for -ENOTTY" has been added to the 3.18-stable tree

This is a note to let you know that I've just added the patch titled

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

to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Hans Verkuil <[email protected]>
Date: Tue, 30 Jan 2018 03:50:01 -0500
Subject: media: v4l2-ioctl.c: don't copy back the result for -ENOTTY

From: Hans Verkuil <[email protected]>

commit 181a4a2d5a0a7b43cab08a70710d727e7764ccdd upstream.

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

---
 drivers/media/v4l2-core/v4l2-ioctl.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

@@ -2539,8 +2539,11 @@ video_usercopy(struct file *file, unsign
 
 	/* Handles IOCTL */
 	err = func(file, cmd, parg);
-	if (err == -ENOIOCTLCMD)
+	if (err == -ENOTTY || err == -ENOIOCTLCMD) {
 		err = -ENOTTY;
+		goto out;
+	}
+
 	if (err == 0) {
 		if (cmd == VIDIOC_DQBUF)
 			trace_v4l2_dqbuf(video_devdata(file)->minor, parg);

Patches currently in stable-queue which might be from [email protected] are

queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch