From 28e3d7002ba9f773662b2cf75d28cadfa29dc442 Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Thu, 20 Oct 2016 18:03:36 +0300
Subject: [PATCH] watchdog: wdat_wdt: Ping the watchdog on resume

It turns out we need to ping the watchdog hardware on resume when we
re-program it. Otherwise this causes inadvertent reset to trigger
right after the resume is complete.

Fixes: 058dfc767008 (ACPI / watchdog: Add support for WDAT hardware watchdog)
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/watchdog/wdat_wdt.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c
index e473e3b237203f..6d1fbda0f461ca 100644
--- a/drivers/watchdog/wdat_wdt.c
+++ b/drivers/watchdog/wdat_wdt.c
@@ -499,6 +499,10 @@ static int wdat_wdt_resume_noirq(struct device *dev)
 		ret = wdat_wdt_enable_reboot(wdat);
 		if (ret)
 			return ret;
+
+		ret = wdat_wdt_ping(&wdat->wdd);
+		if (ret)
+			return ret;
 	}
 
 	return wdat_wdt_start(&wdat->wdd);
-- 
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