X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=drivers%2Fwatchdog%2Fdw_wdt.c;h=fba21de2bbadbc0b80f8cb83224ea9cd2fbc5ab8;hb=ca60ad6a6bc4aa88c02c6f103dd80df54689ea4d;hp=fef7c61f5555aea07b4485b9c76ffa2628dce29b;hpb=58e16d792a6a8c6b750f637a4649967fcac853dc;p=linux.git

diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c
index fef7c61f5555..fba21de2bbad 100644
--- a/drivers/watchdog/dw_wdt.c
+++ b/drivers/watchdog/dw_wdt.c
@@ -114,7 +114,15 @@ static int dw_wdt_set_timeout(struct watchdog_device *wdd, unsigned int top_s)
 	writel(top_val | top_val << WDOG_TIMEOUT_RANGE_TOPINIT_SHIFT,
 	       dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET);
 
-	wdd->timeout = dw_wdt_top_in_seconds(dw_wdt, top_val);
+	/*
+	 * In case users set bigger timeout value than HW can support,
+	 * kernel(watchdog_dev.c) helps to feed watchdog before
+	 * wdd->max_hw_heartbeat_ms
+	 */
+	if (top_s * 1000 <= wdd->max_hw_heartbeat_ms)
+		wdd->timeout = dw_wdt_top_in_seconds(dw_wdt, top_val);
+	else
+		wdd->timeout = top_s;
 
 	return 0;
 }
@@ -135,6 +143,7 @@ static int dw_wdt_start(struct watchdog_device *wdd)
 	struct dw_wdt *dw_wdt = to_dw_wdt(wdd);
 
 	dw_wdt_set_timeout(wdd, wdd->timeout);
+	dw_wdt_ping(&dw_wdt->wdd);
 	dw_wdt_arm_system_reset(dw_wdt);
 
 	return 0;