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Thermal: do not clear passive state during system sleep 

[ Upstream commit 964f4843a4 ]

commit ff140fea84 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Wei Wang 2018-11-07 14:36:11 -08:00 committed by Greg Kroah-Hartman
parent 60846115bb
commit a61cdb8ebc
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/thermal/thermal_core.c
View File

@ -597,16 +597,20 @@ 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)
{
@ -2297,7 +2301,7 @@ 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);
}