[PATCH] dmaengine: ti: edma: Fix runtime PM imbalance on error

[PATCH] dmaengine: ti: edma: Fix runtime PM imbalance on error

[Dinghao Liu]

pm_runtime_get_sync() increments the runtime PM usage counter even
when it 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/dma/ti/edma.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
index c4a5c170c1f9..609ce2607eb7 100644
--- a/drivers/dma/ti/edma.c
+++ b/drivers/dma/ti/edma.c
@@ -2402,8 +2402,7 @@ static int edma_probe(struct platform_device *pdev)
 	ret = pm_runtime_get_sync(dev);
 	if (ret < 0) {
 		dev_err(dev, "pm_runtime_get_sync() failed\n");
-		pm_runtime_disable(dev);
-		return ret;
+		goto err_disable_pm;
 	}
 
 	/* Get eDMA3 configuration from IP */
-- 
2.17.1

Re: [PATCH] dmaengine: ti: edma: Fix runtime PM imbalance on error

[Peter Ujfalusi]

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On 21/05/2020 11.46, Dinghao Liu wrote:
> pm_runtime_get_sync() increments the runtime PM usage counter even
> when it returns an error code. Thus a pairing decrement is needed on
> the error handling path to keep the counter balanced.

Thank you for the patch!

Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
>  drivers/dma/ti/edma.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
> index c4a5c170c1f9..609ce2607eb7 100644
> --- a/drivers/dma/ti/edma.c
> +++ b/drivers/dma/ti/edma.c
> @@ -2402,8 +2402,7 @@ static int edma_probe(struct platform_device *pdev)
>  	ret = pm_runtime_get_sync(dev);
>  	if (ret < 0) {
>  		dev_err(dev, "pm_runtime_get_sync() failed\n");
> -		pm_runtime_disable(dev);
> -		return ret;
> +		goto err_disable_pm;
>  	}
>  
>  	/* Get eDMA3 configuration from IP */
> 

- Péter

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