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authorKeerthy <j-keerthy@ti.com>2017-04-18 09:59:58 +0530
committerZhang Rui <rui.zhang@intel.com>2017-05-05 16:01:44 +0800
commite441fd68663e298e99a99e215e0144a0eda6250d (patch)
tree92b1077a0e5f8325bdd1f489a5af0e81fa37ddcd /drivers/thermal
parent39da7c509acff13fc8cb12ec1bb20337c988ed36 (diff)
downloadlinux-e441fd68663e298e99a99e215e0144a0eda6250d.tar.bz2
thermal: core: Allow orderly_poweroff to be called only once
thermal_zone_device_check --> thermal_zone_device_update --> handle_thermal_trip --> handle_critical_trips --> orderly_poweroff The above sequence happens every 250/500 mS based on the configuration. The orderly_poweroff function is getting called every 250/500 mS. With a full fledged file system it takes at least 5-10 Seconds to power off gracefully. In that period due to the thermal_zone_device_check triggering periodically the thermal work queues bombard with orderly_poweroff calls multiple times eventually leading to failures in gracefully powering off the system. Make sure that orderly_poweroff is called only once. Signed-off-by: Keerthy <j-keerthy@ti.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/thermal_core.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 11f0675cb7e5..8337c272d3ec 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -45,8 +45,10 @@ static LIST_HEAD(thermal_governor_list);
static DEFINE_MUTEX(thermal_list_lock);
static DEFINE_MUTEX(thermal_governor_lock);
+static DEFINE_MUTEX(poweroff_lock);
static atomic_t in_suspend;
+static bool power_off_triggered;
static struct thermal_governor *def_governor;
@@ -342,7 +344,12 @@ static void handle_critical_trips(struct thermal_zone_device *tz,
dev_emerg(&tz->device,
"critical temperature reached(%d C),shutting down\n",
tz->temperature / 1000);
- orderly_poweroff(true);
+ mutex_lock(&poweroff_lock);
+ if (!power_off_triggered) {
+ orderly_poweroff(true);
+ power_off_triggered = true;
+ }
+ mutex_unlock(&poweroff_lock);
}
}
@@ -1463,6 +1470,7 @@ static int __init thermal_init(void)
{
int result;
+ mutex_init(&poweroff_lock);
result = thermal_register_governors();
if (result)
goto error;
@@ -1497,6 +1505,7 @@ error:
ida_destroy(&thermal_cdev_ida);
mutex_destroy(&thermal_list_lock);
mutex_destroy(&thermal_governor_lock);
+ mutex_destroy(&poweroff_lock);
return result;
}