[v2] drm/exynos: fix ref count leak in mic_pre_enable
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Message ID 20200615054928.55188-1-navid.emamdoost@gmail.com
State Not Applicable
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Series
  • [v2] drm/exynos: fix ref count leak in mic_pre_enable
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Commit Message

Navid Emamdoost June 15, 2020, 5:49 a.m. UTC
in mic_pre_enable, pm_runtime_get_sync is called which
increments the counter even in case of failure, leading to incorrect
ref count. In case of failure, decrement the ref count before returning.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
---
Changes in v2:
	- reuse the unlock label and call pm_runtime_put_noidle
---
---
 drivers/gpu/drm/exynos/exynos_drm_mic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

Inki Dae June 16, 2020, 1:13 a.m. UTC | #1
20. 6. 15. 오후 2:49에 Navid Emamdoost 이(가) 쓴 글:
> in mic_pre_enable, pm_runtime_get_sync is called which
> increments the counter even in case of failure, leading to incorrect
> ref count. In case of failure, decrement the ref count before returning.
> 
> Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
> ---
> Changes in v2:
> 	- reuse the unlock label and call pm_runtime_put_noidle

Picked it up.

Thanks,
Inki Dae

> ---
> ---
>  drivers/gpu/drm/exynos/exynos_drm_mic.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> index a86abc173605..3821ea76a703 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> @@ -269,8 +269,10 @@ static void mic_pre_enable(struct drm_bridge *bridge)
>  		goto unlock;
>  
>  	ret = pm_runtime_get_sync(mic->dev);
> -	if (ret < 0)
> +	if (ret < 0) {
> +		pm_runtime_put_noidle(mic->dev);
>  		goto unlock;
> +	}
>  
>  	mic_set_path(mic, 1);
>  
>

Patch
diff mbox series

diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c b/drivers/gpu/drm/exynos/exynos_drm_mic.c
index a86abc173605..3821ea76a703 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
@@ -269,8 +269,10 @@  static void mic_pre_enable(struct drm_bridge *bridge)
 		goto unlock;
 
 	ret = pm_runtime_get_sync(mic->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_noidle(mic->dev);
 		goto unlock;
+	}
 
 	mic_set_path(mic, 1);