linux-kernel - Re: [alsa-devel] [PATCH 13/16] ALSA: au1x00: fix error return code

Open Source and information security mailing list archives

Date:	Sun, 05 Apr 2015 18:06:37 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org,
	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH 13/16] ALSA: au1x00: fix error return code

At Sun,  5 Apr 2015 14:06:33 +0200,
Julia Lawall wrote:
> 
> Return a negative error code on failure.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> identifier ret; expression e1,e2;
> @@
> (
> if (\(ret < 0\|ret != 0\))
>  { ... return ret; }
> |
> ret = 0
> )
> ... when != ret = e1
>     when != &ret
> *if(...)
> {
>   ... when != ret = e2
>       when forall
>  return ret;
> }
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

Applied, thanks.

Takashi

> 
> ---
>  sound/mips/au1x00.c |   12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/sound/mips/au1x00.c b/sound/mips/au1x00.c
> index fbcaa54..1e30e84 100644
> --- a/sound/mips/au1x00.c
> +++ b/sound/mips/au1x00.c
> @@ -633,19 +633,25 @@ static int au1000_ac97_probe(struct platform_device *pdev)
>  
>  	au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream),
>  					   GFP_KERNEL);
> -	if (!au1000->stream[PLAYBACK])
> +	if (!au1000->stream[PLAYBACK]) {
> +		err = -ENOMEM;
>  		goto out;
> +	}
>  	au1000->stream[PLAYBACK]->dma = -1;
>  
>  	au1000->stream[CAPTURE] = kmalloc(sizeof(struct audio_stream),
>  					  GFP_KERNEL);
> -	if (!au1000->stream[CAPTURE])
> +	if (!au1000->stream[CAPTURE]) {
> +		err = -ENOMEM;
>  		goto out;
> +	}
>  	au1000->stream[CAPTURE]->dma = -1;
>  
>  	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!r)
> +	if (!r) {
> +		err = -ENODEV;
>  		goto out;
> +	}
>  
>  	err = -EBUSY;
>  	au1000->ac97_res_port = request_mem_region(r->start, resource_size(r),
> 
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@...a-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 
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