linux-kernel - Re: [PATCH 4/9] sound/soc/omap/am3517evm.c: fix error return code

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Date:	Mon, 20 Aug 2012 09:09:35 +0300
From:	Jarkko Nikula <jarkko.nikula@...mer.com>
To:	Julia Lawall <Julia.Lawall@...6.fr>
CC:	Peter Ujfalusi <peter.ujfalusi@...com>,
	kernel-janitors@...r.kernel.org, Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	linux-omap@...r.kernel.org, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/9] sound/soc/omap/am3517evm.c: fix error return code

On 08/19/2012 10:03 AM, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@...6.fr>
> 
> It was forgotten to initialize ret to the result of calling
> snd_soc_dai_set_sysclk, unlike at the other calls in the same function.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> (
> if@p1 (\(ret < 0\|ret != 0\))
>  { ... return ret; }
> |
> ret@p1 = 0
> )
> ... when != ret = e1
>     when != &ret
> *if(...)
> {
>   ... when != ret = e2
>       when forall
>  return ret;
> }
> 
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  sound/soc/omap/am3517evm.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sound/soc/omap/am3517evm.c b/sound/soc/omap/am3517evm.c
> index 009533a..df65f98 100644
> --- a/sound/soc/omap/am3517evm.c
> +++ b/sound/soc/omap/am3517evm.c
> @@ -59,7 +59,7 @@ static int am3517evm_hw_params(struct snd_pcm_substream *substream,
>  		return ret;
>  	}
>  
> -	snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_FSR_SRC_FSX, 0,
> +	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_FSR_SRC_FSX, 0,
>  				SND_SOC_CLOCK_IN);
>  	if (ret < 0) {
>  		printk(KERN_ERR "can't set CPU system clock OMAP_MCBSP_FSR_SRC_FSX\n");
> 

Acked-by: Jarkko Nikula <jarkko.nikula@...mer.com>
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