[PATCH] dmaengine: tegra210-adma: handle pm_runtime_get_sync failure cases

[PATCH] dmaengine: tegra210-adma: handle pm_runtime_get_sync failure cases

[Navid Emamdoost]

Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count. Call pm_runtime_put if
pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/dma/tegra210-adma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
index c4ce5dfb149b..899eaaf9fc48 100644
--- a/drivers/dma/tegra210-adma.c
+++ b/drivers/dma/tegra210-adma.c
@@ -659,6 +659,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
 	ret = pm_runtime_get_sync(tdc2dev(tdc));
 	if (ret < 0) {
 		free_irq(tdc->irq, tdc);
+		pm_runtime_put(tdc2dev(tdc));
 		return ret;
 	}
 
@@ -870,7 +871,7 @@ static int tegra_adma_probe(struct platform_device *pdev)
 
 	ret = pm_runtime_get_sync(&pdev->dev);
 	if (ret < 0)
-		goto rpm_disable;
+		goto rpm_put;
 
 	ret = tegra_adma_init(tdma);
 	if (ret)
-- 
2.17.1

Re: [PATCH] dmaengine: tegra210-adma: handle pm_runtime_get_sync failure cases

[Jon Hunter]

On 04/06/2020 21:10, Navid Emamdoost wrote:
> Calling pm_runtime_get_sync increments the counter even in case of
> failure, causing incorrect ref count. Call pm_runtime_put if
> pm_runtime_get_sync fails.
> 
> Signed-off-by: Navid Emamdoost <navid.emamdoost-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/dma/tegra210-adma.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
> index c4ce5dfb149b..899eaaf9fc48 100644
> --- a/drivers/dma/tegra210-adma.c
> +++ b/drivers/dma/tegra210-adma.c
> @@ -659,6 +659,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
>  	ret = pm_runtime_get_sync(tdc2dev(tdc));
>  	if (ret < 0) {
>  		free_irq(tdc->irq, tdc);
> +		pm_runtime_put(tdc2dev(tdc));
>  		return ret;
>  	}
>  
> @@ -870,7 +871,7 @@ static int tegra_adma_probe(struct platform_device *pdev)
>  
>  	ret = pm_runtime_get_sync(&pdev->dev);
>  	if (ret < 0)
> -		goto rpm_disable;
> +		goto rpm_put;
>  
>  	ret = tegra_adma_init(tdma);
>  	if (ret)
> 

The label rpm_disable should now be removed. You should also update the
subject-prefix to be [PATCH V2] to make it clear that this is the
updated patch.

Jon

-- 
nvpublic