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

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Message-ID: <498EE7D6.4090100@gmail.com>
Date:	Sun, 08 Feb 2009 15:10:30 +0100
From:	Roel Kluin <roel.kluin@...il.com>
To:	mano@...rinelk.homelinux.net, a.zummo@...ertech.it
CC:	rtc-linux@...glegroups.com, lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH] rtc: t reaches -1, tested 0

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) {


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