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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@google.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.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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