linux-kernel - Re: [PATCH] dma: imx-dma: Remove redundant NULL check before kfree

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Date:	Thu, 21 Mar 2013 14:37:37 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Syam Sidhardhan <syamsidhardh@...il.com>
Cc:	linux-kernel@...r.kernel.org, djbw@...com
Subject: Re: [PATCH] dma: imx-dma: Remove redundant NULL check before kfree

On Mon, Feb 25, 2013 at 04:46:26AM +0530, Syam Sidhardhan wrote:
> kfree on NULL pointer is a no-op.
> 
> Signed-off-by: Syam Sidhardhan <s.syam@...sung.com>
Applied thanks
> ---
>  drivers/dma/imx-dma.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
> index 70b8975..0988583 100644
> --- a/drivers/dma/imx-dma.c
> +++ b/drivers/dma/imx-dma.c
> @@ -859,8 +859,7 @@ static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
>  
>  	desc = list_first_entry(&imxdmac->ld_free, struct imxdma_desc, node);
>  
> -	if (imxdmac->sg_list)
> -		kfree(imxdmac->sg_list);
> +	kfree(imxdmac->sg_list);
>  
>  	imxdmac->sg_list = kcalloc(periods + 1,
>  			sizeof(struct scatterlist), GFP_KERNEL);
> -- 
> 1.7.9.5
> 
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