linux-kernel - [PATCH 6/10] thermal_throttle: fix cpu hotplug error handling

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Message-ID: <20070716135704.GF2040@APFDCB5C>
Date:	Mon, 16 Jul 2007 22:57:04 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org, Dmitriy Zavin <dmitriyz@...gle.com>
Subject: [PATCH 6/10] thermal_throttle: fix cpu hotplug error handling

Make thermal_throttle_add_dev() CPU_UP_PREPARE event handler
instead of CPU_ONLINE event handler.

Cc: Dmitriy Zavin <dmitriyz@...gle.com>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>

---
 arch/i386/kernel/cpu/mcheck/therm_throt.c |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

Index: 2.6-mm/arch/i386/kernel/cpu/mcheck/therm_throt.c
===================================================================
--- 2.6-mm.orig/arch/i386/kernel/cpu/mcheck/therm_throt.c
+++ 2.6-mm/arch/i386/kernel/cpu/mcheck/therm_throt.c
@@ -131,23 +131,24 @@ static __cpuinit int thermal_throttle_cp
 {
 	unsigned int cpu = (unsigned long)hcpu;
 	struct sys_device *sys_dev;
-	int err;
+	int err = 0;
 
 	sys_dev = get_cpu_sysdev(cpu);
 	mutex_lock(&therm_cpu_lock);
 	switch (action) {
-	case CPU_ONLINE:
-	case CPU_ONLINE_FROZEN:
+	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		err = thermal_throttle_add_dev(sys_dev);
-		WARN_ON(err);
 		break;
+	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 	case CPU_DEAD:
 	case CPU_DEAD_FROZEN:
 		thermal_throttle_remove_dev(sys_dev);
 		break;
 	}
 	mutex_unlock(&therm_cpu_lock);
-	return NOTIFY_OK;
+	return err ? NOTIFY_BAD : NOTIFY_OK;
 }
 
 static struct notifier_block thermal_throttle_cpu_notifier =
-
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