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-rw-r--r--drivers/acpi/thermal.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 30a341337933..912703691d36 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -769,6 +769,47 @@ static void acpi_thermal_run(unsigned long data)
769 acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); 769 acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data);
770} 770}
771 771
772static void acpi_thermal_active_off(void *data)
773{
774 int result = 0;
775 struct acpi_thermal *tz = data;
776 int i = 0;
777 int j = 0;
778 struct acpi_thermal_active *active = NULL;
779
780 if (!tz) {
781 printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
782 return;
783 }
784
785 result = acpi_thermal_get_temperature(tz);
786 if (result)
787 return;
788
789 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
790 active = &(tz->trips.active[i]);
791 if (!active || !active->flags.valid)
792 break;
793 if (tz->temperature >= active->temperature) {
794 /*
795 * If the thermal temperature is greater than the
796 * active threshod, unnecessary to turn off the
797 * the active cooling device.
798 */
799 continue;
800 }
801 /*
802 * Below Threshold?
803 * ----------------
804 * Turn OFF all cooling devices associated with this
805 * threshold.
806 */
807 for (j = 0; j < active->devices.count; j++)
808 result = acpi_bus_set_power(active->devices.handles[j],
809 ACPI_STATE_D3);
810 }
811}
812
772static void acpi_thermal_check(void *data) 813static void acpi_thermal_check(void *data)
773{ 814{
774 int result = 0; 815 int result = 0;
@@ -1624,6 +1665,8 @@ static int acpi_thermal_add(struct acpi_device *device)
1624 1665
1625 init_timer(&tz->timer); 1666 init_timer(&tz->timer);
1626 1667
1668 acpi_thermal_active_off(tz);
1669
1627 acpi_thermal_check(tz); 1670 acpi_thermal_check(tz);
1628 1671
1629 status = acpi_install_notify_handler(device->handle, 1672 status = acpi_install_notify_handler(device->handle,