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Commit e441fd68 authored by Keerthy's avatar Keerthy Committed by Zhang Rui
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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: default avatarKeerthy <j-keerthy@ti.com>
Acked-by: default avatarEduardo Valentin <edubezval@gmail.com>
Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
parent 39da7c50

drivers/thermal/thermal_core.c

+10 −1
Original line number Diff line number Diff line
@@ -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);

		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 @@ static int __init thermal_init(void) 
	ida_destroy(&thermal_cdev_ida);

	mutex_destroy(&thermal_list_lock);

	mutex_destroy(&thermal_governor_lock);

	mutex_destroy(&poweroff_lock);

	return result;

}