From 80060362aaefec507ac2d7a7bd156716d7a7ca91 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Tue, 10 Oct 2006 03:40:44 -0400 Subject: [PATCH] [WATCHDOG] watchdog/iTCO_wdt: fix bug related to gcc uninit warning MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit gcc emits the following warning: drivers/char/watchdog/iTCO_wdt.c: In function ‘iTCO_wdt_ioctl’: drivers/char/watchdog/iTCO_wdt.c:429: warning: ‘time_left’ may be used uninitialized in this function This indicates a condition near enough to a bug, to want to fix. iTCO_wdt_get_timeleft() stores a value in 'time_left' iff iTCO_version==(1 or 2). This driver only supports versions 1 or 2, so this is ok. However, since (a) the return value of iTCO_wdt_get_timeleft() is handled anyway, (b) it fixes the warning, and (c) it future-proofs the driver, we go ahead and add the obvious return value. Signed-off-by: Jeff Garzik Signed-off-by: Wim Van Sebroeck Signed-off-by: Andrew Morton --- drivers/char/watchdog/iTCO_wdt.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/char/watchdog/iTCO_wdt.c b/drivers/char/watchdog/iTCO_wdt.c index 505aae917764..b6f29cb8bd39 100644 --- a/drivers/char/watchdog/iTCO_wdt.c +++ b/drivers/char/watchdog/iTCO_wdt.c @@ -368,7 +368,8 @@ static int iTCO_wdt_get_timeleft (int *time_left) spin_unlock(&iTCO_wdt_private.io_lock); *time_left = (val8 * 6) / 10; - } + } else + return -EINVAL; return 0; } @@ -439,7 +440,6 @@ static int iTCO_wdt_ioctl (struct inode *inode, struct file *file, { int new_options, retval = -EINVAL; int new_heartbeat; - int time_left; void __user *argp = (void __user *)arg; int __user *p = argp; static struct watchdog_info ident = { @@ -499,6 +499,8 @@ static int iTCO_wdt_ioctl (struct inode *inode, struct file *file, case WDIOC_GETTIMELEFT: { + int time_left; + if (iTCO_wdt_get_timeleft(&time_left)) return -EINVAL;