linux-kernel - [PATCH] media: rockchip/rga: Fix a reference count leak.

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Date:   Sat, 13 Jun 2020 18:13:49 -0500
From:   wu000273@....edu
To:     kjlu@....edu
Cc:     wu000273@....edu, Jacob Chen <jacob-chen@...wrt.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Hans Verkuil <hansverk@...co.com>, linux-media@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] media: rockchip/rga: Fix a reference count leak.

From: Qiushi Wu <wu000273@....edu>

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus call pm_runtime_put_noidle()
if pm_runtime_get_sync() fails.

Fixes: f7e7b48e6d79 ("[media] rockchip/rga: v4l2 m2m support")
Signed-off-by: Qiushi Wu <wu000273@....edu>
---
 drivers/media/platform/rockchip/rga/rga-buf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/rockchip/rga/rga-buf.c b/drivers/media/platform/rockchip/rga/rga-buf.c
index 36b821ccc1db..bf9a75b75083 100644
--- a/drivers/media/platform/rockchip/rga/rga-buf.c
+++ b/drivers/media/platform/rockchip/rga/rga-buf.c
@@ -81,6 +81,7 @@ static int rga_buf_start_streaming(struct vb2_queue *q, unsigned int count)
 
 	ret = pm_runtime_get_sync(rga->dev);
 	if (ret < 0) {
+		pm_runtime_put_noidle(rga->dev);
 		rga_buf_return_buffers(q, VB2_BUF_STATE_QUEUED);
 		return ret;
 	}
-- 
2.17.1