linux-kernel - Re: [PATCH] drivers: uio_dmem_genirq: Fix memory leak in uio_dmem_genirq

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Date:	Thu, 22 May 2014 16:47:58 +0200
From:	"Hans J. Koch" <hjk@...sjkoch.de>
To:	Daeseok Youn <daeseok.youn@...il.com>
Cc:	hjk@...sjkoch.de, gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers: uio_dmem_genirq: Fix memory leak in
 uio_dmem_genirq_probe()

On Thu, May 22, 2014 at 09:46:12AM +0900, Daeseok Youn wrote:
> When platform_get_irq() is failed after "priv" allocated,
> it need to free "priv". But the label of bad0 doesn't try
> to free about "priv". So this patch changes that lable to "bad1".
> But "bad1" has pm_runtime_disable() call, this function should
> be called when uio_register_device() is failed. So it is moved
> into handling error for uio_register_device().

Looks alright to me. Thanks for your contribution.

Signed-off-by: Hans J. Koch <hjk@...sjkoch.de>

> 
> Signed-off-by: Daeseok Youn <daeseok.youn@...il.com>
> ---
>  drivers/uio/uio_dmem_genirq.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
> index 1270f3b..8d0bba4 100644
> --- a/drivers/uio/uio_dmem_genirq.c
> +++ b/drivers/uio/uio_dmem_genirq.c
> @@ -204,7 +204,7 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev)
>  		ret = platform_get_irq(pdev, 0);
>  		if (ret < 0) {
>  			dev_err(&pdev->dev, "failed to get IRQ\n");
> -			goto bad0;
> +			goto bad1;
>  		}
>  		uioinfo->irq = ret;
>  	}
> @@ -275,6 +275,7 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev)
>  	ret = uio_register_device(&pdev->dev, priv->uioinfo);
>  	if (ret) {
>  		dev_err(&pdev->dev, "unable to register uio device\n");
> +		pm_runtime_disable(&pdev->dev);
>  		goto bad1;
>  	}
>  
> @@ -282,7 +283,6 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev)
>  	return 0;
>   bad1:
>  	kfree(priv);
> -	pm_runtime_disable(&pdev->dev);
>   bad0:
>  	/* kfree uioinfo for OF */
>  	if (pdev->dev.of_node)
> -- 
> 1.7.1
> 
> 
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