linux-kernel - Re: [PATCH v2 1/4] DMA: PL330: Free memory allocated for peripheral channels

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Message-ID: <1351051550.5263.15.camel@vkoul-udesk3>
Date:	Wed, 24 Oct 2012 09:35:50 +0530
From:	Vinod Koul <vkoul@...radead.org>
To:	Inderpal Singh <inderpal.singh@...aro.org>
Cc:	vinod.koul@...el.com, linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org, jassisinghbrar@...il.com,
	boojin.kim@...sung.com, patches@...aro.org, kgene.kim@...sung.com
Subject: Re: [PATCH v2 1/4] DMA: PL330: Free memory allocated for
 peripheral channels

On Fri, 2012-10-05 at 15:47 +0530, Inderpal Singh wrote:
> The allocated memory for peripheral channels is not being freed upon
> failure in probe and in module's remove funtion. It will lead to memory
> leakage. Hence free the allocated memory.
> 
> Signed-off-by: Inderpal Singh <inderpal.singh@...aro.org>
> ---
>  drivers/dma/pl330.c |    5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index 2ebd4cd..10c6b6a 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -2962,7 +2962,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
>  	ret = dma_async_device_register(pd);
>  	if (ret) {
>  		dev_err(&adev->dev, "unable to register DMAC\n");
> -		goto probe_err4;
> +		goto probe_err5;
>  	}
>  
>  	dev_info(&adev->dev,
> @@ -2975,6 +2975,8 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
>  
>  	return 0;
>  
> +probe_err5:
> +	kfree(pdmac->peripherals);
>  probe_err4:
>  	pl330_del(pi);
>  probe_err3:
> @@ -3025,6 +3027,7 @@ static int __devexit pl330_remove(struct amba_device *adev)
>  	res = &adev->res;
>  	release_mem_region(res->start, resource_size(res));
>  
> +	kfree(pdmac->peripherals);
>  	kfree(pdmac);
>  
>  	return 0;

This looks fine, but if you use devm_ functions then you dont need to do
all this.
Can you do that conversion instead?

-- 
Vinod Koul
Intel Corp.

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