[PATCH 5.6 006/254] media: vimc: streamer: fix memory leak in vimc subdevs if kthread_run fails

[Greg Kroah-Hartman]

From: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>

[ Upstream commit ceeb2e6166dddf3c9757abbbf84032027e2fa2d2 ]

In case kthread_run fails, the vimc subdevices
should be notified that streaming stopped so they can
release the memory for the streaming. Also, kthread should be
set to NULL.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
Acked-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/media/platform/vimc/vimc-streamer.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/vimc/vimc-streamer.c b/drivers/media/platform/vimc/vimc-streamer.c
index cd6b55433c9ee..43e494df61d88 100644
--- a/drivers/media/platform/vimc/vimc-streamer.c
+++ b/drivers/media/platform/vimc/vimc-streamer.c
@@ -207,8 +207,13 @@ int vimc_streamer_s_stream(struct vimc_stream *stream,
 		stream->kthread = kthread_run(vimc_streamer_thread, stream,
 					      "vimc-streamer thread");
 
-		if (IS_ERR(stream->kthread))
-			return PTR_ERR(stream->kthread);
+		if (IS_ERR(stream->kthread)) {
+			ret = PTR_ERR(stream->kthread);
+			dev_err(ved->dev, "kthread_run failed with %d\n", ret);
+			vimc_streamer_pipeline_terminate(stream);
+			stream->kthread = NULL;
+			return ret;
+		}
 
 	} else {
 		if (!stream->kthread)
-- 
2.20.1