linux-kernel - Re: [PATCH] rtc: t reaches -1, tested 0

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Message-ID: <20090208192300.51d0a80c@scarran.roarinelk.net>
Date:	Sun, 8 Feb 2009 19:23:00 +0100
From:	Manuel Lauss <mano@...rinelk.homelinux.net>
To:	Roel Kluin <roel.kluin@...il.com>
Cc:	a.zummo@...ertech.it, rtc-linux@...glegroups.com,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] rtc: t reaches -1, tested 0

Hey Roel,

On Sun, 08 Feb 2009 15:10:30 +0100
Roel Kluin <roel.kluin@...il.com> wrote:
> With a postfix decrement t will reach -1 rather than 0,
> so the warning nor errot_out occur.
> 
> Signed-off-by: Roel Kluin <roel.kluin@...il.com>
> ---
> diff --git a/drivers/rtc/rtc-au1xxx.c b/drivers/rtc/rtc-au1xxx.c
> index 8906a68..979ed04 100644
> --- a/drivers/rtc/rtc-au1xxx.c
> +++ b/drivers/rtc/rtc-au1xxx.c
> @@ -81,7 +81,7 @@ static int __devinit au1xtoy_rtc_probe(struct platform_device *pdev)
>  	if (au_readl(SYS_TOYTRIM) != 32767) {
>  		/* wait until hardware gives access to TRIM register */
>  		t = 0x00100000;
> -		while ((au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_T0S) && t--)
> +		while ((au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_T0S) && --t)
>  			msleep(1);
>  
>  		if (!t) {

Thank you, obviously correct.

Acked-by: Manuel Lauss <mano@...rinelk.homelinux.net>
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