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[media] sur40: fix occasional oopses on device close 

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>
Cc: <stable@vger.kernel.org>      # for v4.2 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Florian Echtler 2016-05-31 17:15:33 -03:00 committed by Mauro Carvalho Chehab
parent af766ee005
commit 6a85881566
1 changed files with 2 additions and 1 deletions
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3
drivers/input/touchscreen/sur40.c
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@ -447,7 +447,7 @@ static void sur40_process_video(struct sur40_state *sur40)
/* return error if streaming was stopped in the meantime */
if (sur40->sequence == -1)
goto err_poll;
return;
/* mark as finished */
new_buf->vb.vb2_buf.timestamp = ktime_get_ns();
@ -725,6 +725,7 @@ static int sur40_start_streaming(struct vb2_queue *vq, unsigned int count)
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 */