diff --git a/drivers/media/i2c/ov7251.c b/drivers/media/i2c/ov7251.c
index 4867dc86cd2e4eb4a99c811d0b69c90d700a7bb7..0e7be15bc20a7ea8c2ec59e4b96a19654c7f3a67 100644
--- a/drivers/media/i2c/ov7251.c
+++ b/drivers/media/i2c/ov7251.c
@@ -1378,6 +1378,7 @@ static int ov7251_s_stream(struct v4l2_subdev *subdev, int enable)
 
 err_power_down:
 	pm_runtime_put_noidle(ov7251->dev);
+	mutex_unlock(&ov7251->lock);
 	return ret;
 }