Hello Qinglang,

On Fri, Nov 27, 2020 at 05:44:44PM +0800, Qinglang Miao wrote:

pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in a reference leak here.

A new function pm_runtime_resume_and_get is introduced in [0] to keep usage counter balanced. So We fix the reference leak by replacing it with new funtion.

[0] dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")

I -think- you can break this line. Anyway, maintainers can fix when applying if they feel to.

Fixes: e08e934d6c28 ("drm: rcar-du: Add support for CMM") Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Qinglang Miao miaoqinglang@huawei.com

Seems fair! Acked-by: Jacopo Mondi jacopo@jmondi.org

Thanks j

---

drivers/gpu/drm/rcar-du/rcar_cmm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.c b/drivers/gpu/drm/rcar-du/rcar_cmm.c index c578095b0..382d53f8a 100644 --- a/drivers/gpu/drm/rcar-du/rcar_cmm.c +++ b/drivers/gpu/drm/rcar-du/rcar_cmm.c @@ -122,7 +122,7 @@ int rcar_cmm_enable(struct platform_device *pdev) { int ret;

• ret = pm_runtime_get_sync(&pdev->dev);

• ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) return ret;

-- 2.23.0