[PATCH v3] thermal/core: Clear all mitigation when thermal zone is disabled

[Manaf Meethalavalappu Pallikunhi]

Whenever a thermal zone is in trip violated state, there is a chance
that the same thermal zone mode can be disabled either via thermal
core API or via thermal zone sysfs. Once it is disabled, the framework
bails out any re-evaluation of thermal zone. It leads to a case where
if it is already in mitigation state, it will stay the same state
until it is re-enabled.

To avoid above mentioned issue, on thermal zone disable request
reset thermal zone and clear mitigation for each trip explicitly.

Signed-off-by: Manaf Meethalavalappu Pallikunhi <quic_manafm@xxxxxxxxxxx>
---
 drivers/thermal/thermal_core.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 51374f4..e288c82 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -447,10 +447,18 @@ static int thermal_zone_device_set_mode(struct thermal_zone_device *tz,
 
 	thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
 
-	if (mode == THERMAL_DEVICE_ENABLED)
+	if (mode == THERMAL_DEVICE_ENABLED) {
 		thermal_notify_tz_enable(tz->id);
-	else
+	} else {
+		int trip;
+
+		/* make sure all previous throttlings are cleared */
+		thermal_zone_device_init(tz);
+		for (trip = 0; trip < tz->trips; trip++)
+			handle_thermal_trip(tz, trip);
+
 		thermal_notify_tz_disable(tz->id);
+	}
 
 	return ret;
 }