Patch "[media] sur40: fix occasional oopses on device close" has been added to the 4.4-stable tree

Patch "[media] sur40: fix occasional oopses on device close" has been added to the 4.4-stable tree

[gregkh]

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

    [media] sur40: fix occasional oopses on device close

to the 4.4-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:
     sur40-fix-occasional-oopses-on-device-close.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 6a8588156657e607fcfdffd46c1daae8ba88a1e5 Mon Sep 17 00:00:00 2001
From: Florian Echtler <floe@butterbrot.org>
Date: Tue, 31 May 2016 17:15:33 -0300
Subject: [media] sur40: fix occasional oopses on device close

From: Florian Echtler <floe@butterbrot.org>

commit 6a8588156657e607fcfdffd46c1daae8ba88a1e5 upstream.

Closing the V4L2 device sometimes triggers a kernel oops.
Present patch fixes this.

Signed-off-by: Martin Kaltenbrunner <modin@yuri.at>
Signed-off-by: Florian Echtler <floe@butterbrot.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/input/touchscreen/sur40.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -441,7 +441,7 @@ static void sur40_process_video(struct s
 
 	/* return error if streaming was stopped in the meantime */
 	if (sur40->sequence == -1)
-		goto err_poll;
+		return;
 
 	/* mark as finished */
 	v4l2_get_timestamp(&new_buf->vb.timestamp);
@@ -730,6 +730,7 @@ static int sur40_start_streaming(struct
 static void sur40_stop_streaming(struct vb2_queue *vq)
 {
 	struct sur40_state *sur40 = vb2_get_drv_priv(vq);
+	vb2_wait_for_all_buffers(vq);
 	sur40->sequence = -1;
 
 	/* Release all active buffers */


Patches currently in stable-queue which might be from floe@butterbrot.org are

queue-4.4/sur40-fix-occasional-oopses-on-device-close.patch
queue-4.4/sur40-lower-poll-interval-to-fix-occasional-fps-drops-to-56-fps.patch