linux-kernel - Re: [PATCH 1/4] ASoC: imx-pcm-dma: add NULL test

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Date:	Sun, 20 Dec 2015 23:34:32 -0800
From:	Nicolin Chen <nicoleotsuka@...il.com>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	Timur Tabi <timur@...i.org>, kernel-janitors@...r.kernel.org,
	Xiubo Li <Xiubo.Lee@...il.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] ASoC: imx-pcm-dma: add NULL test

On Sun, Dec 20, 2015 at 12:15:50PM +0100, Julia Lawall wrote:
> Add NULL test on call to devm_kzalloc.
> 
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression x;
> @@
> 
> * x = devm_kzalloc(...);
>   ... when != x == NULL
>   *x
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

Acked-by: Nicolin Chen <nicoleotsuka@...il.com>

Thank you

> 
> ---
>  sound/soc/fsl/imx-pcm-dma.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/sound/soc/fsl/imx-pcm-dma.c b/sound/soc/fsl/imx-pcm-dma.c
> index 1fc01ed..f3d3d1f 100644
> --- a/sound/soc/fsl/imx-pcm-dma.c
> +++ b/sound/soc/fsl/imx-pcm-dma.c
> @@ -62,6 +62,8 @@ int imx_pcm_dma_init(struct platform_device *pdev, size_t size)
>  
>  	config = devm_kzalloc(&pdev->dev,
>  			sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL);
> +	if (!config)
> +		return -ENOMEM;
>  	*config = imx_dmaengine_pcm_config;
>  	if (size)
>  		config->prealloc_buffer_size = size;
> 
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