From: Alexander Usyskin <[email protected]> Watchdog ping return errors are ignored by watchdog core, Whatchdog daemon should be informed about possible hardware error or underlaying device driver get unregistered.
Signed-off-by: Alexander Usyskin <[email protected]> Signed-off-by: Tomas Winkler <[email protected]> --- drivers/watchdog/watchdog_dev.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 6aaefbad303e..423a7e0dd919 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -295,6 +295,7 @@ static ssize_t watchdog_write(struct file *file, const char __user *data, struct watchdog_device *wdd = file->private_data; size_t i; char c; + int err; if (len == 0) return 0; @@ -314,7 +315,9 @@ static ssize_t watchdog_write(struct file *file, const char __user *data, } /* someone wrote to us, so we send the watchdog a keepalive ping */ - watchdog_ping(wdd); + err = watchdog_ping(wdd); + if (err < 0) + return err; return len; } @@ -370,8 +373,7 @@ static long watchdog_ioctl(struct file *file, unsigned int cmd, case WDIOC_KEEPALIVE: if (!(wdd->info->options & WDIOF_KEEPALIVEPING)) return -EOPNOTSUPP; - watchdog_ping(wdd); - return 0; + return watchdog_ping(wdd); case WDIOC_SETTIMEOUT: if (get_user(val, p)) return -EFAULT; @@ -381,7 +383,9 @@ static long watchdog_ioctl(struct file *file, unsigned int cmd, /* If the watchdog is active then we send a keepalive ping * to make sure that the watchdog keep's running (and if * possible that it takes the new timeout) */ - watchdog_ping(wdd); + err = watchdog_ping(wdd); + if (err < 0) + return err; /* Fall */ case WDIOC_GETTIMEOUT: /* timeout == 0 means that we don't know the timeout */ -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
