linux-kernel - [PATCH 6/6] ipmi: Use locks on watchdog timeout set on reboot

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Message-id: <1328284079-5489-6-git-send-email-cminyard@mvista.com>
Date:	Fri, 03 Feb 2012 09:47:59 -0600
From:	Corey Minyard <cminyard@...sta.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	OpenIPMI Developers <openipmi-developer@...ts.sourceforge.net>,
	Corey Minyard <cminyard@...sta.com>
Subject: [PATCH 6/6] ipmi: Use locks on watchdog timeout set on reboot

The IPMI watchdog timer clears or extends the timer on reboot/shutdown.
It was using the non-locking routine for setting the watchdog timer, but
this was causing race conditions.  Instead, use the locking version to
avoid the races.  It seems to work fine.

Signed-off-by: Corey Minyard <cminyard@...sta.com>
---
 drivers/char/ipmi/ipmi_watchdog.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index 57a53ba..99dc1da 100644
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -1167,7 +1167,7 @@ static int wdog_reboot_handler(struct notifier_block *this,
 		if (code == SYS_POWER_OFF || code == SYS_HALT) {
 			/* Disable the WDT if we are shutting down. */
 			ipmi_watchdog_state = WDOG_TIMEOUT_NONE;
-			panic_halt_ipmi_set_timeout();
+			ipmi_set_timeout(IPMI_SET_TIMEOUT_NO_HB);
 		} else if (ipmi_watchdog_state != WDOG_TIMEOUT_NONE) {
 			/* Set a long timer to let the reboot happens, but
 			   reboot if it hangs, but only if the watchdog
@@ -1175,7 +1175,7 @@ static int wdog_reboot_handler(struct notifier_block *this,
 			timeout = 120;
 			pretimeout = 0;
 			ipmi_watchdog_state = WDOG_TIMEOUT_RESET;
-			panic_halt_ipmi_set_timeout();
+			ipmi_set_timeout(IPMI_SET_TIMEOUT_NO_HB);
 		}
 	}
 	return NOTIFY_OK;
-- 
1.7.4.1

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