hwrng: exynos - fix runtime pm imbalance on error
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Message ID 20200520131911.16813-1-dinghao.liu@zju.edu.cn
State Not Applicable
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Series
  • hwrng: exynos - fix runtime pm imbalance on error
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Commit Message

Dinghao Liu May 20, 2020, 1:19 p.m. UTC
pm_runtime_get_sync() increments the runtime PM usage counter even
the call returns an error code. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/char/hw_random/exynos-trng.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Comments

Lukasz Stelmach May 21, 2020, 1:52 p.m. UTC | #1
It was <2020-05-20 śro 21:19>, when Dinghao Liu wrote:
> pm_runtime_get_sync() increments the runtime PM usage counter even
> the call returns an error code. Thus a pairing decrement is needed
> on the error handling path to keep the counter balanced.
>
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
>  drivers/char/hw_random/exynos-trng.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
> index 8e1fe3f8dd2d..133e017db577 100644
> --- a/drivers/char/hw_random/exynos-trng.c
> +++ b/drivers/char/hw_random/exynos-trng.c
> @@ -165,9 +165,8 @@ static int exynos_trng_probe(struct platform_device *pdev)
>  	clk_disable_unprepare(trng->clk);
>  
>  err_clock:
> -	pm_runtime_put_sync(&pdev->dev);
> -
>  err_pm_get:
> +	pm_runtime_put_sync(&pdev->dev);
>  	pm_runtime_disable(&pdev->dev);
>  
>  	return ret;

You are right. I will accept the patch, when you remove the err_clock
label and and change goto instructions above to point to
err_pm_get. There is no point in having two labels.

Thank you.

Patch
diff mbox series

diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
index 8e1fe3f8dd2d..133e017db577 100644
--- a/drivers/char/hw_random/exynos-trng.c
+++ b/drivers/char/hw_random/exynos-trng.c
@@ -165,9 +165,8 @@  static int exynos_trng_probe(struct platform_device *pdev)
 	clk_disable_unprepare(trng->clk);
 
 err_clock:
-	pm_runtime_put_sync(&pdev->dev);
-
 err_pm_get:
+	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 
 	return ret;