[PATCH v3 12/12] media: staging: rkisp1: cap: protect access to buf with the spin lock

[Dafna Hirschfeld]

The function 'rkisp1_stream_start' calls 'rkisp1_set_next_buf'
which access the buffers, so the call should be protected by
taking the cap->buf.lock.
After this patch, all locks are reviewed and commented so remove
the TODO item "review and comment every lock"

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld at collabora.com>
---
 drivers/staging/media/rkisp1/TODO             | 1 -
 drivers/staging/media/rkisp1/rkisp1-capture.c | 2 ++
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/media/rkisp1/TODO b/drivers/staging/media/rkisp1/TODO
index f0c90d1c86a8..9662e9b51c7f 100644
--- a/drivers/staging/media/rkisp1/TODO
+++ b/drivers/staging/media/rkisp1/TODO
@@ -1,6 +1,5 @@
 * Fix pad format size for statistics and parameters entities.
 * Fix checkpatch errors.
-* Review and comment every lock
 * Handle quantization
 * streaming paths (mainpath and selfpath) check if the other path is streaming
 in several places of the code, review this, specially that it doesn't seem it
diff --git a/drivers/staging/media/rkisp1/rkisp1-capture.c b/drivers/staging/media/rkisp1/rkisp1-capture.c
index 012c0825a386..b9e56dab77af 100644
--- a/drivers/staging/media/rkisp1/rkisp1-capture.c
+++ b/drivers/staging/media/rkisp1/rkisp1-capture.c
@@ -913,6 +913,7 @@ static void rkisp1_stream_start(struct rkisp1_capture *cap)
 	cap->ops->config(cap);
 
 	/* Setup a buffer for the next frame */
+	spin_lock_irq(&cap->buf.lock);
 	rkisp1_set_next_buf(cap);
 	cap->ops->enable(cap);
 	/* It's safe to config ACTIVE and SHADOW regs for the
@@ -930,6 +931,7 @@ static void rkisp1_stream_start(struct rkisp1_capture *cap)
 			     RKISP1_CIF_MI_INIT_SOFT_UPD, RKISP1_CIF_MI_INIT);
 		rkisp1_set_next_buf(cap);
 	}
+	spin_unlock_irq(&cap->buf.lock);
 	cap->is_streaming = true;
 }
 
-- 
2.17.1