linux-kernel - Re: [PATCH] ASoC: dapm: Fix uninitialized variable in snd_soc_dapm_get_enum

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Message-ID: <53E8A47A.4030808@metafoo.de>
Date:	Mon, 11 Aug 2014 13:09:46 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Geert Uytterhoeven <geert+renesas@...der.be>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
CC:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: dapm: Fix uninitialized variable in snd_soc_dapm_get_enum_double()

On 08/08/2014 05:29 PM, Geert Uytterhoeven wrote:
> If soc_dapm_read() fails, reg_val will be uninitialized, and bogus
> values will be written later:
>
> sound/soc/soc-dapm.c: In function 'snd_soc_dapm_get_enum_double':
> sound/soc/soc-dapm.c:2862:15: warning: 'reg_val' may be used uninitialized in this function [-Wmaybe-uninitialized]
>    unsigned int reg_val, val;
>                 ^
>
> Return early on error to fix this.
>
> Introduced by commit ce0fc93ae56e2ba50ff8c220d69e4e860e889320 ("ASoC:
> Add DAPM support at the component level").
> ---
> Is this correct? Please review.

Yes, thanks.

Acked-by: Lars-Peter Clausen <lars@...afoo.de>

>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>


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