linux-kernel - [PATCHv2 2/2] watchdog: fix w83627hf

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Message-Id: <1364695148-5605-2-git-send-email-tonychung00@gmail.com>
Date:	Sat, 30 Mar 2013 18:59:08 -0700
From:	Tony Chung <tonychung00@...il.com>
To:	Wim Van Sebroeck <wim@...ana.be>, linux-watchdog@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Tony Chung <tonychung00@...il.com>
Subject: [PATCHv2 2/2] watchdog: fix w83627hf_wdt reboot due to timeout expired

Observed that the w83627hf watchdog timer start counting during reboot.
If the system load the driver after 5  minutes, it rebooted immediately because of timer expired.
For example, fsck took more than 5 minutes to run, then reboot will occurred.

Signed-off-by: Tony Chung <tonychung00@...il.com>
---
 drivers/watchdog/w83627hf_wdt.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c
index 8f1111d..47eb233 100644
--- a/drivers/watchdog/w83627hf_wdt.c
+++ b/drivers/watchdog/w83627hf_wdt.c
@@ -174,6 +174,11 @@ static void w83627hf_init(void)
 
 	outb_p(0xF7, WDT_EFER); /* Select CRF7 */
 	t = inb_p(WDT_EFDR);      /* read CRF7 */
+	if (t & 0x10) {
+		pr_info("Watchdog Timer timeout occurred!");
+		t &= ~0x10; /* clear the event */
+		pr_info("Event cleared\n");
+	}
 	t &= ~0xC0;               /* disable keyboard & mouse turning off
 				    watchdog */
 	outb_p(t, WDT_EFDR);    /* Write back to CRF7 */
-- 
1.7.0.4

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