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-rw-r--r--drivers/watchdog/at91sam9_wdt.c10
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))