diff options
Diffstat (limited to 'drivers/watchdog/at91sam9_wdt.c')
| -rw-r--r-- | drivers/watchdog/at91sam9_wdt.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c index 65f469145950..ab0c4e0165d1 100644 --- a/drivers/watchdog/at91sam9_wdt.c +++ b/drivers/watchdog/at91sam9_wdt.c @@ -213,7 +213,15 @@ static int at91_wdt_init(struct platform_device *pdev, struct at91wdt *wdt) tmp & wdt->mr_mask, wdt->mr & wdt->mr_mask); setup_timer(&wdt->timer, at91_ping, (unsigned long)wdt); - mod_timer(&wdt->timer, jiffies + wdt->heartbeat); + + /* + * Use min_heartbeat the first time to avoid spurious watchdog reset: + * we don't know for how long the watchdog counter is running, and + * - resetting it right now might trigger a watchdog fault reset + * - waiting for heartbeat time might lead to a watchdog timeout + * reset + */ + mod_timer(&wdt->timer, jiffies + min_heartbeat); /* Try to set timeout from device tree first */ if (watchdog_init_timeout(&wdt->wdd, 0, dev)) |