lkml.org 
[lkml]   [2020]   [Dec]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] drm: rcar-du: fix reference leak in rcar_cmm_enable
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
>

\
 
 \ /
  Last update: 2020-12-15 12:41    [W:0.049 / U:0.888 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site