Thermal: do not clear passive state during system sleep

commit ff140fea847e ("Thermal: handle thermal zone device properly
during system sleep") added PM hook to call thermal zone reset during
sleep. However resetting thermal zone will also clear the passive state
and thus cancel the polling queue which leads the passive cooling device
state not being cleared properly after sleep.

thermal_pm_notify => thermal_zone_device_reset set passive to 0
thermal_zone_trip_update will skip update passive as `old_target ==
instance->target'.
monitor_thermal_zone => thermal_zone_device_set_polling will cancel
tz->poll_queue, so the cooling device state will not be changed
afterwards.

Reported-by: Kame Wang <kamewang@google.com>
Signed-off-by: Wei Wang <wvw@google.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 39fc812..6590bb5 100644 (file)
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -451,16 +451,20 @@ static void update_temperature(struct thermal_zone_device *tz)
                        tz->last_temperature, tz->temperature);
 }
 
-static void thermal_zone_device_reset(struct thermal_zone_device *tz)
+static void thermal_zone_device_init(struct thermal_zone_device *tz)
 {
        struct thermal_instance *pos;
-
        tz->temperature = THERMAL_TEMP_INVALID;
-       tz->passive = 0;
        list_for_each_entry(pos, &tz->thermal_instances, tz_node)
                pos->initialized = false;
 }
 
+static void thermal_zone_device_reset(struct thermal_zone_device *tz)
+{
+       tz->passive = 0;
+       thermal_zone_device_init(tz);
+}
+
 void thermal_zone_device_update(struct thermal_zone_device *tz,
                                enum thermal_notify_event event)
 {
@@ -1502,7 +1506,7 @@ static int thermal_pm_notify(struct notifier_block *nb,
        case PM_POST_SUSPEND:
                atomic_set(&in_suspend, 0);
                list_for_each_entry(tz, &thermal_tz_list, node) {
-                       thermal_zone_device_reset(tz);
+                       thermal_zone_device_init(tz);
                        thermal_zone_device_update(tz,
                                                   THERMAL_EVENT_UNSPECIFIED);
                }