From: Maciej W. Rozycki <macro@linux-mips.org>
Date: Mon, 12 May 2008 21:02:35 +0000 (-0700)
Subject: RTC/watchdog: M41T80: fix a potential use of unitialized data
X-Git-Tag: v2.6.26-rc3~76
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=417607d05f41dbe2acccdb7a298a81d30ba1d22b;p=linux-2.6-omap-h63xx.git

RTC/watchdog: M41T80: fix a potential use of unitialized data

Watchdog handlers within the driver make use of "save_client" -- make sure it
has been initalized before the handlers are registered.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexander Bigga <ab@mycable.de>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 316bfaa8087..3d451ece253 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -803,6 +803,7 @@ static int m41t80_probe(struct i2c_client *client,
 
 #ifdef CONFIG_RTC_DRV_M41T80_WDT
 	if (clientdata->features & M41T80_FEATURE_HT) {
+		save_client = client;
 		rc = misc_register(&wdt_dev);
 		if (rc)
 			goto exit;
@@ -811,7 +812,6 @@ static int m41t80_probe(struct i2c_client *client,
 			misc_deregister(&wdt_dev);
 			goto exit;
 		}
-		save_client = client;
 	}
 #endif
 	return 0;