linux-kernel - Re: [alsa-devel] [PATCH] sound/oss/pss: Fix test of unsigned in pss_reset_dsp() and pss_download_boot()

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Message-ID: <s5h6385essp.wl%tiwai@suse.de>
Date:	Thu, 17 Dec 2009 12:36:22 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Roel Kluin <roel.kluin@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, alsa-devel@...a-project.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [alsa-devel] [PATCH] sound/oss/pss: Fix test of unsigned in pss_reset_dsp() and pss_download_boot()

At Wed, 16 Dec 2009 16:54:43 +0100,
Roel Kluin wrote:
> 
> limit and jiffies are unsigned so the test did not work.
> 
> Signed-off-by: Roel Kluin <roel.kluin@...il.com>
> ---
> Found using coccinelle: http://coccinelle.lip6.fr/
> 
> >> -	for (i = 0; i < 32768 && (limit-jiffies >= 0); i++)
> >> +	for (i = 0; i < 32768 && (limit >= jiffies); i++)
> > 
> > No, it should use time_after_eq(limit, jiffies) instead.
> > 
> > 
> > thanks,
> > 
> > Takashi
> > 
> 
> Ok,

Applied now.  Thanks.

Takashi

> 
> diff --git a/sound/oss/pss.c b/sound/oss/pss.c
> index 83f5ee2..e19dd5d 100644
> --- a/sound/oss/pss.c
> +++ b/sound/oss/pss.c
> @@ -269,7 +269,7 @@ static int pss_reset_dsp(pss_confdata * devc)
>  	unsigned long   i, limit = jiffies + HZ/10;
>  
>  	outw(0x2000, REG(PSS_CONTROL));
> -	for (i = 0; i < 32768 && (limit-jiffies >= 0); i++)
> +	for (i = 0; i < 32768 && time_after_eq(limit, jiffies); i++)
>  		inw(REG(PSS_CONTROL));
>  	outw(0x0000, REG(PSS_CONTROL));
>  	return 1;
> @@ -369,11 +369,11 @@ static int pss_download_boot(pss_confdata * devc, unsigned char *block, int size
>  		outw(0, REG(PSS_DATA));
>  
>  		limit = jiffies + HZ/10;
> -		for (i = 0; i < 32768 && (limit - jiffies >= 0); i++)
> +		for (i = 0; i < 32768 && time_after_eq(limit, jiffies); i++)
>  			val = inw(REG(PSS_STATUS));
>  
>  		limit = jiffies + HZ/10;
> -		for (i = 0; i < 32768 && (limit-jiffies >= 0); i++)
> +		for (i = 0; i < 32768 && time_after_eq(limit, jiffies); i++)
>  		{
>  			val = inw(REG(PSS_STATUS));
>  			if (val & 0x4000)
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@...a-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 
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