linux-kernel - Re: [PATCH v2 2/3] ALSA: ice1712: consider error value

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Message-ID: <s5h61eihxkc.wl-tiwai@suse.de>
Date:	Fri, 14 Nov 2014 11:43:31 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] ALSA: ice1712: consider error value

At Fri, 14 Nov 2014 16:09:06 +0530,
Sudip Mukherjee wrote:
> 
> earlier we were ignoring the return value of snd_ak4114_create and
> always returning 0.
> now we are returning the actual status. revo_init is calling this
> function, and revo_init is checking the return value.

It's not enough only to change there.  The problem is that
spec->ak4114 is dereferenced after snd_ak4114_create(), and this might
be NULL.  So it should return the error before that point.


Takashi


> Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
> ---
>  sound/pci/ice1712/revo.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sound/pci/ice1712/revo.c b/sound/pci/ice1712/revo.c
> index 1112ec1..2835196 100644
> --- a/sound/pci/ice1712/revo.c
> +++ b/sound/pci/ice1712/revo.c
> @@ -498,7 +498,7 @@ static int ap192_ak4114_init(struct snd_ice1712 *ice)
>  	 * No reason to stop capture stream due to incorrect checks */
>  	spec->ak4114->check_flags = AK4114_CHECK_NO_RATE;
>  
> -	return 0; /* error ignored; it's no fatal error */
> +	return err;
>  }
>  
>  static int revo_init(struct snd_ice1712 *ice)
> -- 
> 1.8.1.2
> 
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