linux-kernel - Re: [PATCH v2] ASoC: rsnd: fix usrcnt decrementing bug

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Message-ID: <87d1twfgdi.wl%kuninori.morimoto.gx@renesas.com>
Date:	Thu, 24 Dec 2015 07:38:54 +0000
From:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:	Andrzej Hajda <a.hajda@...sung.com>
CC:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	"moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
	<alsa-devel@...a-project.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] ASoC: rsnd: fix usrcnt decrementing bug


Hi
> 
> Field usrcnt is unsigned so it cannot be lesser than zero.
> The patch fixes the check, moves it to the beginning of the function
> and changes return value to -EIO in case of usercnt error.
> 
> The problem has been detected using proposed semantic patch
> scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].
> 
> [1]: http://permalink.gmane.org/gmane.linux.kernel/2038576
> 
> Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
> ---

Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

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