[PATCH 2/4] media: mt9m111: add streaming check to set_fmt

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From: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>

Currently set_fmt don't care about the streaming status, so the format
can be changed during streaming. This can lead into wrong behaviours.

Check if the device is already streaming and return -EBUSY to avoid
wrong behaviours.

Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
Reviewed-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
 drivers/media/i2c/mt9m111.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/i2c/mt9m111.c b/drivers/media/i2c/mt9m111.c
index 78d08a81e0e2..d060075a670b 100644
--- a/drivers/media/i2c/mt9m111.c
+++ b/drivers/media/i2c/mt9m111.c
@@ -561,6 +561,9 @@ static int mt9m111_set_fmt(struct v4l2_subdev *sd,
 	bool bayer;
 	int ret;
 
+	if (mt9m111->is_streaming)
+		return -EBUSY;
+
 	if (format->pad)
 		return -EINVAL;
 
-- 
2.19.0




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