From: Manaf Meethalavalappu Pallikunhi manafm@codeaurora.org
[ Upstream commit 99b63316c39988039965693f5f43d8b4ccb1c86c ]
During the suspend is in process, thermal_zone_device_update bails out thermal zone re-evaluation for any sensor trip violation without setting next valid trip to that sensor. It assumes during resume it will re-evaluate same thermal zone and update trip. But when it is in suspend temperature goes down and on resume path while updating thermal zone if temperature is less than previously violated trip, thermal zone set trip function evaluates the same previous high and previous low trip as new high and low trip. Since there is no change in high/low trip, it bails out from thermal zone set trip API without setting any trip. It leads to a case where sensor high trip or low trip is disabled forever even though thermal zone has a valid high or low trip.
During thermal zone device init, reset thermal zone previous high and low trip. It resolves above mentioned scenario.
Signed-off-by: Manaf Meethalavalappu Pallikunhi manafm@codeaurora.org Reviewed-by: Thara Gopinath thara.gopinath@linaro.org Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/thermal/thermal_core.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 4c2dc3a59eb59..5ef30ba3b73a4 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -601,6 +601,8 @@ static void thermal_zone_device_init(struct thermal_zone_device *tz) { struct thermal_instance *pos; tz->temperature = THERMAL_TEMP_INVALID; + tz->prev_low_trip = -INT_MAX; + tz->prev_high_trip = INT_MAX; list_for_each_entry(pos, &tz->thermal_instances, tz_node) pos->initialized = false; }