linux-kernel - Re: [PATCH 2/4] ASoC: omap-hdmi-audio: add NULL test

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Date:	Mon, 21 Dec 2015 11:35:18 +0200
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	Julia Lawall <Julia.Lawall@...6.fr>
CC:	<kernel-janitors@...r.kernel.org>,
	Jarkko Nikula <jarkko.nikula@...mer.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>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	"Sarha, Jyri" <jsarha@...com>
Subject: Re: [PATCH 2/4] ASoC: omap-hdmi-audio: add NULL test

On 12/20/2015 01:15 PM, 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;
> identifier fld;
> @@
> 
> * x = devm_kzalloc(...);
>   ... when != x == NULL
>   x->fld
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

Acked-by: Peter Ujfalusi <peter.ujfalusi@...com>

> ---
>  sound/soc/omap/omap-hdmi-audio.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/sound/soc/omap/omap-hdmi-audio.c b/sound/soc/omap/omap-hdmi-audio.c
> index 584b237..f83cc2b 100644
> --- a/sound/soc/omap/omap-hdmi-audio.c
> +++ b/sound/soc/omap/omap-hdmi-audio.c
> @@ -368,6 +368,8 @@ static int omap_hdmi_audio_probe(struct platform_device *pdev)
>  	card->owner = THIS_MODULE;
>  	card->dai_link =
>  		devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL);
> +	if (!card->dai_link)
> +		return -ENOMEM;
>  	card->dai_link->name = card->name;
>  	card->dai_link->stream_name = card->name;
>  	card->dai_link->cpu_dai_name = dev_name(ad->dssdev);
> 


-- 
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