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| author | Jeff Garzik <jeff@garzik.org> | 2006-10-10 11:40:44 +0400 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2006-10-12 01:12:31 +0400 |
| commit | 80060362aaefec507ac2d7a7bd156716d7a7ca91 (patch) | |
| tree | a8c97880324f12aeeeded9cec6d3908ac95cc2d9 /drivers/char | |
| parent | a8edd74e4404d011ab821d5bf35b27335d26f001 (diff) | |
| download | linux-80060362aaefec507ac2d7a7bd156716d7a7ca91.tar.xz | |
[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>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/watchdog/iTCO_wdt.c | 6 |
1 files 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; |