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Subject: [media] sur40: fix occasional oopses on device close
Author: Florian Echtler <floe@xxxxxxxxxxxxxx>
Date: Tue May 31 17:15:33 2016 -0300
Closing the V4L2 device sometimes triggers a kernel oops.
Present patch fixes this.
Signed-off-by: Martin Kaltenbrunner <modin@xxxxxxx>
Signed-off-by: Florian Echtler <floe@xxxxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # for v4.2 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
drivers/input/touchscreen/sur40.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index bff525f26e87..b2f3d266dd17 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -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 */
--
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