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authorJeff Garzik <jeff@garzik.org>2006-10-10 03:40:44 -0400
committerWim Van Sebroeck <wim@iguana.be>2006-10-11 23:12:31 +0200
commit80060362aaefec507ac2d7a7bd156716d7a7ca91 (patch)
treea8c97880324f12aeeeded9cec6d3908ac95cc2d9
parenta8edd74e4404d011ab821d5bf35b27335d26f001 (diff)
[WATCHDOG] watchdog/iTCO_wdt: fix bug related to gcc uninit warning
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 <jeff@garzik.org> Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Andrew Morton <akpm@osdl.org>
-rw-r--r--drivers/char/watchdog/iTCO_wdt.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/char/watchdog/iTCO_wdt.c b/drivers/char/watchdog/iTCO_wdt.c
index 505aae91776..b6f29cb8bd3 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;