thermal: gov_user_space: Do not lock thermal zone mutex

rafaeljw · rafaeljw · commit 72c976fc3a4b · 2022-08-30T20:18:47.000+02:00
Commit 670a5e3 ("thermal/core: Move the thermal zone lock out of the governors") moved thermal zone locking away from governors, but it forgot about the user space one which deadlocks now. Fix this by removing the thermal zone locking from the user space governor. Fixes: 670a5e3 ("thermal/core: Move the thermal zone lock out of the governors") Tested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/thermal/gov_user_space.c b/drivers/thermal/gov_user_space.c
@@ -34,7 +34,8 @@ static int notify_user_space(struct thermal_zone_device *tz, int trip)
 	char *thermal_prop[5];
 	int i;
 
-	mutex_lock(&tz->lock);
+	lockdep_assert_held(&tz->lock);
+
 	thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type);
 	thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature);
 	thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip);
@@ -43,7 +44,7 @@ static int notify_user_space(struct thermal_zone_device *tz, int trip)
 	kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);
 	for (i = 0; i < 4; ++i)
 		kfree(thermal_prop[i]);
-	mutex_unlock(&tz->lock);
+
 	return 0;
 }
 
