linux-kernel - Re: [PATCH v2] dma: mmp_pdma: fix a memory alloc error

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Message-ID: <20130705064549.GD10947@intel.com>
Date:	Fri, 5 Jul 2013 12:15:49 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Xiang Wang <wangxfdu@...il.com>
Cc:	Dan Williams <djbw@...com>, linux-kernel@...r.kernel.org,
	cxie4@...vell.com, Xiang Wang <wangx@...vell.com>
Subject: Re: [PATCH v2] dma: mmp_pdma: fix a memory alloc error

On Tue, Jun 18, 2013 at 02:21:58PM +0800, Xiang Wang 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.
> 
> 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..18ac57f 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(*pdev->phy), GFP_KERNEL);
While at it, can you make the flag GFP_NOWAIT. that is the recommendation for
dmac drivers

--
~Vinod
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