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

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Date:	Thu, 25 Oct 2012 16:29:10 +0530
From:	Inderpal Singh <inderpal.singh@...aro.org>
To:	Vinod Koul <vkoul@...radead.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

Hi Vinod,

Thanks for reviewing.

On 24 October 2012 09:35, Vinod Koul <vkoul@...radead.org> wrote:
> 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?
>

Good point.
I will do the conversion and send it again.

Regards,
Inder

> --
> Vinod Koul
> Intel Corp.
>
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