diff options
Diffstat (limited to 'drivers/watchdog/watchdog_dev.c')
| -rw-r--r-- | drivers/watchdog/watchdog_dev.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 3595cffa24ea..14f8a92fca12 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -92,9 +92,13 @@ static inline bool watchdog_need_worker(struct watchdog_device *wdd) * thus is aware that the framework supports generating heartbeat * requests. * - Userspace requests a longer timeout than the hardware can handle. + * + * Alternatively, if userspace has not opened the watchdog + * device, we take care of feeding the watchdog if it is + * running. */ - return hm && ((watchdog_active(wdd) && t > hm) || - (t && !watchdog_active(wdd) && watchdog_hw_running(wdd))); + return (hm && watchdog_active(wdd) && t > hm) || + (t && !watchdog_active(wdd) && watchdog_hw_running(wdd)); } static long watchdog_next_keepalive(struct watchdog_device *wdd) @@ -107,7 +111,7 @@ static long watchdog_next_keepalive(struct watchdog_device *wdd) unsigned int hw_heartbeat_ms; virt_timeout = wd_data->last_keepalive + msecs_to_jiffies(timeout_ms); - hw_heartbeat_ms = min(timeout_ms, wdd->max_hw_heartbeat_ms); + hw_heartbeat_ms = min_not_zero(timeout_ms, wdd->max_hw_heartbeat_ms); keepalive_interval = msecs_to_jiffies(hw_heartbeat_ms / 2); if (!watchdog_active(wdd)) |