linux-kernel - Re: [PATCH 2/2] ASoC: Add BUG() assertion if max98095_get_bq

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Message-ID: <CABqxG0cswfkC9g65PyR9exX+X--Un8veUPS_5qjcZ=hZbfPvUA@mail.gmail.com>
Date:	Thu, 29 Sep 2011 09:33:14 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel@...r.kernel.org, Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	alsa-devel@...a-project.org,
	Peter Hsiang <peter.hsiang@...im-ic.com>,
	Jesse Marroquin <jesse.marroquin@...im-ic.com>
Subject: Re: [PATCH 2/2] ASoC: Add BUG() assertion if max98095_get_bq_channel
 returns -EINVAL

On Wed, Sep 28, 2011 at 10:02 PM, Axel Lin <axel.lin@...il.com> wrote:
> The callers use the return value of max98095_get_bq_channel as array index to
> access max98095->dai[] array.
> Add BUG() assertion for out of bound access of max98095->dai[] array.
>
> Signed-off-by: Axel Lin <axel.lin@...il.com>
> ---
>  sound/soc/codecs/max98095.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/sound/soc/codecs/max98095.c b/sound/soc/codecs/max98095.c
> index 668434d..973c02d 100644
> --- a/sound/soc/codecs/max98095.c
> +++ b/sound/soc/codecs/max98095.c
> @@ -1998,6 +1998,7 @@ static int max98095_get_bq_channel(const char *name)
>                return 0;
>        if (strcmp(name, "Biquad2 Mode") == 0)
>                return 1;
> +       BUG();
>        return -EINVAL;

below better?
BUG_ON(strcmp(name, "Biquad2 Mode"));
return 1;

Or BUG_ON(channel < 0) in caller

>  }
>
> --
> 1.7.4.1
>
>
>
> --
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-- 
Regards
Dave
--
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