linux-kernel - Re: [PATCH] dma: mmp_pdma: fix a memory alloc error

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Message-ID: <CACDNBm0iOP=T3tqYpSR87j8Ac91w0Epw9_nNhy_w3nr9661sdQ@mail.gmail.com>
Date:	Fri, 31 May 2013 12:56:32 +0800
From:	Xiang Wang <wangxfdu@...il.com>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
Cc:	Dan Williams <djbw@...com>, Vinod Koul <vinod.koul@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	cxie4@...vell.com, Xiang Wang <wangx@...vell.com>
Subject: Re: [PATCH] dma: mmp_pdma: fix a memory alloc error

2013/5/28 Andy Shevchenko <andy.shevchenko@...il.com>:
> On Tue, May 28, 2013 at 3:05 PM, Xiang Wang <wangxfdu@...il.com> wrote:
>> From: Xiang Wang <wangx@...vell.com>
>>
>> pdev->phy is of type "struct mmp_pdma_phy *". But when
>> allocating memory for it, "struct mmp_pdma_chan" is used
>> by mistake.
>
> Have you tested it?
>
>> Signed-off-by: Xiang Wang <wangx@...vell.com>
>> ---
>>  drivers/dma/mmp_pdma.c |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c
>> index c26699f..76a8dcf 100644
>> --- a/drivers/dma/mmp_pdma.c
>> +++ b/drivers/dma/mmp_pdma.c
>> @@ -801,7 +801,7 @@ static int mmp_pdma_probe(struct platform_device *op)
>>         }
>>
>>         pdev->phy = devm_kzalloc(pdev->dev,
>> -               dma_channels * sizeof(struct mmp_pdma_chan), GFP_KERNEL);
>> +               dma_channels * sizeof(struct mmp_pdma_phy), GFP_KERNEL);
>
> For me it seems you did get how it works.
>
> --
> With Best Regards,
> Andy Shevchenko

Hi, Andy
Yes. I've tested on marvell pxa988 platform using dmatest.ko.
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