Merge branch 'acpi-thermal'

Merge ACPI thermal driver changes for 6.6-rc1:

 - Drop non-functional nocrt parameter from ACPI thermal (Mario
   Limonciello).

 - Clean up the ACPI thermal driver, rework the handling of firmware
   notifications in it and make it provide a table of generic trip point
   structures to the core during initialization (Rafael Wysocki).

* acpi-thermal:
  ACPI: thermal: Eliminate code duplication from acpi_thermal_notify()
  ACPI: thermal: Drop unnecessary thermal zone callbacks
  ACPI: thermal: Rework thermal_get_trend()
  ACPI: thermal: Use trip point table to register thermal zones
  thermal: core: Rework and rename __for_each_thermal_trip()
  ACPI: thermal: Introduce struct acpi_thermal_trip
  ACPI: thermal: Carry out trip point updates under zone lock
  ACPI: thermal: Clean up acpi_thermal_register_thermal_zone()
  thermal: core: Add priv pointer to struct thermal_trip
  thermal: core: Introduce thermal_zone_device_exec()
  thermal: core: Do not handle trip points with invalid temperature
  ACPI: thermal: Drop redundant local variable from acpi_thermal_resume()
  ACPI: thermal: Do not attach private data to ACPI handles
  ACPI: thermal: Drop enabled flag from struct acpi_thermal_active
  ACPI: thermal: Drop nocrt parameter

Documentation/admin-guide/kernel-parameters.txt

@@ -6275,10 +6275,6 @@
 			-1: disable all critical trip points in all thermal zones
 			<degrees C>: override all critical trip points
 
-	thermal.nocrt=	[HW,ACPI]
-			Set to disable actions on ACPI thermal zone
-			critical and hot trip points.
-
 	thermal.off=	[HW,ACPI]
 			1: disable ACPI thermal control
 

drivers/acpi/thermal.c

@@ -82,10 +82,6 @@ static int tzp;
 module_param(tzp, int, 0444);
 MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
 
-static int nocrt;
-module_param(nocrt, int, 0);
-MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
-
 static int off;
 module_param(off, int, 0);
 MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
@@ -96,35 +92,27 @@ MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
 
 static struct workqueue_struct *acpi_thermal_pm_queue;
 
-struct acpi_thermal_critical {
-	unsigned long temperature;
-	bool valid;
-};
-
-struct acpi_thermal_hot {
+struct acpi_thermal_trip {
 	unsigned long temperature;
 	bool valid;
 };
 
 struct acpi_thermal_passive {
+	struct acpi_thermal_trip trip;
 	struct acpi_handle_list devices;
-	unsigned long temperature;
 	unsigned long tc1;
 	unsigned long tc2;
 	unsigned long tsp;
-	bool valid;
 };
 
 struct acpi_thermal_active {
+	struct acpi_thermal_trip trip;
 	struct acpi_handle_list devices;
-	unsigned long temperature;
-	bool valid;
-	bool enabled;
 };
 
 struct acpi_thermal_trips {
-	struct acpi_thermal_critical critical;
-	struct acpi_thermal_hot hot;
+	struct acpi_thermal_trip critical;
+	struct acpi_thermal_trip hot;
 	struct acpi_thermal_passive passive;
 	struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
 };
@@ -137,6 +125,7 @@ struct acpi_thermal {
 	unsigned long polling_frequency;
 	volatile u8 zombie;
 	struct acpi_thermal_trips trips;
+	struct thermal_trip *trip_table;
 	struct acpi_handle_list devices;
 	struct thermal_zone_device *thermal_zone;
 	int kelvin_offset;	/* in millidegrees */
@@ -190,7 +179,16 @@ static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
 	return 0;
 }
 
-static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
+static int acpi_thermal_temp(struct acpi_thermal *tz, int temp_deci_k)
+{
+	if (temp_deci_k == THERMAL_TEMP_INVALID)
+		return THERMAL_TEMP_INVALID;
+
+	return deci_kelvin_to_millicelsius_with_offset(temp_deci_k,
+						       tz->kelvin_offset);
+}
+
+static void __acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 {
 	acpi_status status;
 	unsigned long long tmp;
@@ -255,9 +253,9 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 	}
 
 	/* Passive (optional) */
-	if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.valid) ||
+	if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.trip.valid) ||
 	    flag == ACPI_TRIPS_INIT) {
-		valid = tz->trips.passive.valid;
+		valid = tz->trips.passive.trip.valid;
 		if (psv == -1) {
 			status = AE_SUPPORT;
 		} else if (psv > 0) {
@@ -269,44 +267,44 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 		}
 
 		if (ACPI_FAILURE(status)) {
-			tz->trips.passive.valid = false;
+			tz->trips.passive.trip.valid = false;
 		} else {
-			tz->trips.passive.temperature = tmp;
-			tz->trips.passive.valid = true;
+			tz->trips.passive.trip.temperature = tmp;
+			tz->trips.passive.trip.valid = true;
 			if (flag == ACPI_TRIPS_INIT) {
 				status = acpi_evaluate_integer(tz->device->handle,
 							       "_TC1", NULL, &tmp);
 				if (ACPI_FAILURE(status))
-					tz->trips.passive.valid = false;
+					tz->trips.passive.trip.valid = false;
 				else
 					tz->trips.passive.tc1 = tmp;
 
 				status = acpi_evaluate_integer(tz->device->handle,
 							       "_TC2", NULL, &tmp);
 				if (ACPI_FAILURE(status))
-					tz->trips.passive.valid = false;
+					tz->trips.passive.trip.valid = false;
 				else
 					tz->trips.passive.tc2 = tmp;
 
 				status = acpi_evaluate_integer(tz->device->handle,
 							       "_TSP", NULL, &tmp);
 				if (ACPI_FAILURE(status))
-					tz->trips.passive.valid = false;
+					tz->trips.passive.trip.valid = false;
 				else
 					tz->trips.passive.tsp = tmp;
 			}
 		}
 	}
-	if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.valid) {
+	if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.trip.valid) {
 		memset(&devices, 0, sizeof(struct acpi_handle_list));
 		status = acpi_evaluate_reference(tz->device->handle, "_PSL",
 						 NULL, &devices);
 		if (ACPI_FAILURE(status)) {
 			acpi_handle_info(tz->device->handle,
 					 "Invalid passive threshold\n");
-			tz->trips.passive.valid = false;
+			tz->trips.passive.trip.valid = false;
 		} else {
-			tz->trips.passive.valid = true;
+			tz->trips.passive.trip.valid = true;
 		}
 
 		if (memcmp(&tz->trips.passive.devices, &devices,
@@ -317,24 +315,24 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 		}
 	}
 	if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
-		if (valid != tz->trips.passive.valid)
+		if (valid != tz->trips.passive.trip.valid)
 			ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "state");
 	}
 
 	/* Active (optional) */
 	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
 		char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
-		valid = tz->trips.active[i].valid;
+		valid = tz->trips.active[i].trip.valid;
 
 		if (act == -1)
 			break; /* disable all active trip points */
 
 		if (flag == ACPI_TRIPS_INIT || ((flag & ACPI_TRIPS_ACTIVE) &&
-		    tz->trips.active[i].valid)) {
+		    tz->trips.active[i].trip.valid)) {
 			status = acpi_evaluate_integer(tz->device->handle,
 						       name, NULL, &tmp);
 			if (ACPI_FAILURE(status)) {
-				tz->trips.active[i].valid = false;
+				tz->trips.active[i].trip.valid = false;
 				if (i == 0)
 					break;
 
@@ -342,35 +340,36 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 					break;
 
 				if (i == 1)
-					tz->trips.active[0].temperature = celsius_to_deci_kelvin(act);
+					tz->trips.active[0].trip.temperature =
+							celsius_to_deci_kelvin(act);
 				else
 					/*
 					 * Don't allow override higher than
 					 * the next higher trip point
 					 */
-					tz->trips.active[i-1].temperature =
+					tz->trips.active[i-1].trip.temperature =
 						min_t(unsigned long,
-						      tz->trips.active[i-2].temperature,
+						      tz->trips.active[i-2].trip.temperature,
 						      celsius_to_deci_kelvin(act));
 
 				break;
 			} else {
-				tz->trips.active[i].temperature = tmp;
-				tz->trips.active[i].valid = true;
+				tz->trips.active[i].trip.temperature = tmp;
+				tz->trips.active[i].trip.valid = true;
 			}
 		}
 
 		name[2] = 'L';
-		if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].valid) {
+		if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].trip.valid) {
 			memset(&devices, 0, sizeof(struct acpi_handle_list));
 			status = acpi_evaluate_reference(tz->device->handle,
 							 name, NULL, &devices);
 			if (ACPI_FAILURE(status)) {
 				acpi_handle_info(tz->device->handle,
 						 "Invalid active%d threshold\n", i);
-				tz->trips.active[i].valid = false;
+				tz->trips.active[i].trip.valid = false;
 			} else {
-				tz->trips.active[i].valid = true;
+				tz->trips.active[i].trip.valid = true;
 			}
 
 			if (memcmp(&tz->trips.active[i].devices, &devices,
@@ -381,10 +380,10 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 			}
 		}
 		if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
-			if (valid != tz->trips.active[i].valid)
+			if (valid != tz->trips.active[i].trip.valid)
 				ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "state");
 
-		if (!tz->trips.active[i].valid)
+		if (!tz->trips.active[i].trip.valid)
 			break;
 	}
 
@@ -398,24 +397,73 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 			ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device");
 		}
 	}
+}
+
+static int acpi_thermal_adjust_trip(struct thermal_trip *trip, void *data)
+{
+	struct acpi_thermal_trip *acpi_trip = trip->priv;
+	struct acpi_thermal *tz = data;
+
+	if (!acpi_trip)
+		return 0;
+
+	if (acpi_trip->valid)
+		trip->temperature = acpi_thermal_temp(tz, acpi_trip->temperature);
+	else
+		trip->temperature = THERMAL_TEMP_INVALID;
 
 	return 0;
 }
 
+static void acpi_thermal_adjust_thermal_zone(struct thermal_zone_device *thermal,
+					     unsigned long data)
+{
+	struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
+	int flag = data == ACPI_THERMAL_NOTIFY_THRESHOLDS ?
+				ACPI_TRIPS_THRESHOLDS : ACPI_TRIPS_DEVICES;
+
+	__acpi_thermal_trips_update(tz, flag);
+
+	for_each_thermal_trip(tz->thermal_zone, acpi_thermal_adjust_trip, tz);
+}
+
+static void acpi_queue_thermal_check(struct acpi_thermal *tz)
+{
+	if (!work_pending(&tz->thermal_check_work))
+		queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work);
+}
+
+static void acpi_thermal_trips_update(struct acpi_thermal *tz, u32 event)
+{
+	struct acpi_device *adev = tz->device;
+
+	/*
+	 * Use thermal_zone_device_exec() to carry out the trip points
+	 * update, so as to protect thermal_get_trend() from getting stale
+	 * trip point temperatures and to prevent thermal_zone_device_update()
+	 * invoked from acpi_thermal_check_fn() from producing inconsistent
+	 * results.
+	 */
+	thermal_zone_device_exec(tz->thermal_zone,
+				 acpi_thermal_adjust_thermal_zone, event);
+	acpi_queue_thermal_check(tz);
+	acpi_bus_generate_netlink_event(adev->pnp.device_class,
+					dev_name(&adev->dev), event, 0);
+}
+
 static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
 {
-	int i, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
 	bool valid;
+	int i;
 
-	if (ret)
-		return ret;
+	__acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
 
 	valid = tz->trips.critical.valid |
 		tz->trips.hot.valid |
-		tz->trips.passive.valid;
+		tz->trips.passive.trip.valid;
 
 	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
-		valid = valid || tz->trips.active[i].valid;
+		valid = valid || tz->trips.active[i].trip.valid;
 
 	if (!valid) {
 		pr_warn(FW_BUG "No valid trip found\n");
@@ -443,159 +491,55 @@ static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp)
 	return 0;
 }
 
-static int thermal_get_trip_type(struct thermal_zone_device *thermal,
-				 int trip, enum thermal_trip_type *type)
+static int thermal_get_trend(struct thermal_zone_device *thermal,
+			     int trip_index, enum thermal_trend *trend)
 {
 	struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
-	int i;
+	struct acpi_thermal_trip *acpi_trip;
+	int t, i;
 
-	if (!tz || trip < 0)
+	if (!tz || trip_index < 0)
 		return -EINVAL;
 
-	if (tz->trips.critical.valid) {
-		if (!trip) {
-			*type = THERMAL_TRIP_CRITICAL;
-			return 0;
-		}
-		trip--;
-	}
+	if (tz->trips.critical.valid)
+		trip_index--;
 
-	if (tz->trips.hot.valid) {
-		if (!trip) {
-			*type = THERMAL_TRIP_HOT;
-			return 0;
-		}
-		trip--;
-	}
+	if (tz->trips.hot.valid)
+		trip_index--;
 
-	if (tz->trips.passive.valid) {
-		if (!trip) {
-			*type = THERMAL_TRIP_PASSIVE;
-			return 0;
-		}
-		trip--;
-	}
-
-	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].valid; i++) {
-		if (!trip) {
-			*type = THERMAL_TRIP_ACTIVE;
-			return 0;
-		}
-		trip--;
-	}
-
-	return -EINVAL;
-}
-
-static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
-				 int trip, int *temp)
-{
-	struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
-	int i;
-
-	if (!tz || trip < 0)
+	if (trip_index < 0)
 		return -EINVAL;
 
-	if (tz->trips.critical.valid) {
-		if (!trip) {
-			*temp = deci_kelvin_to_millicelsius_with_offset(
-					tz->trips.critical.temperature,
-					tz->kelvin_offset);
-			return 0;
-		}
-		trip--;
-	}
+	acpi_trip = &tz->trips.passive.trip;
+	if (acpi_trip->valid && !trip_index--) {
+		t = tz->trips.passive.tc1 * (tz->temperature -
+						tz->last_temperature) +
+			tz->trips.passive.tc2 * (tz->temperature -
+						acpi_trip->temperature);
+		if (t > 0)
+			*trend = THERMAL_TREND_RAISING;
+		else if (t < 0)
+			*trend = THERMAL_TREND_DROPPING;
+		else
+			*trend = THERMAL_TREND_STABLE;
 
-	if (tz->trips.hot.valid) {
-		if (!trip) {
-			*temp = deci_kelvin_to_millicelsius_with_offset(
-					tz->trips.hot.temperature,
-					tz->kelvin_offset);
-			return 0;
-		}
-		trip--;
-	}
-
-	if (tz->trips.passive.valid) {
-		if (!trip) {
-			*temp = deci_kelvin_to_millicelsius_with_offset(
-					tz->trips.passive.temperature,
-					tz->kelvin_offset);
-			return 0;
-		}
-		trip--;
-	}
-
-	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
-		tz->trips.active[i].valid; i++) {
-		if (!trip) {
-			*temp = deci_kelvin_to_millicelsius_with_offset(
-					tz->trips.active[i].temperature,
-					tz->kelvin_offset);
-			return 0;
-		}
-		trip--;
-	}
-
-	return -EINVAL;
-}
-
-static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
-				int *temperature)
-{
-	struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
-
-	if (tz->trips.critical.valid) {
-		*temperature = deci_kelvin_to_millicelsius_with_offset(
-					tz->trips.critical.temperature,
-					tz->kelvin_offset);
 		return 0;
 	}
 
-	return -EINVAL;
-}
+	t = acpi_thermal_temp(tz, tz->temperature);
 
-static int thermal_get_trend(struct thermal_zone_device *thermal,
-			     int trip, enum thermal_trend *trend)
-{
-	struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
-	enum thermal_trip_type type;
-	int i;
-
-	if (thermal_get_trip_type(thermal, trip, &type))
-		return -EINVAL;
-
-	if (type == THERMAL_TRIP_ACTIVE) {
-		int trip_temp;
-		int temp = deci_kelvin_to_millicelsius_with_offset(
-					tz->temperature, tz->kelvin_offset);
-		if (thermal_get_trip_temp(thermal, trip, &trip_temp))
-			return -EINVAL;
-
-		if (temp > trip_temp) {
-			*trend = THERMAL_TREND_RAISING;
-			return 0;
-		} else {
-			/* Fall back on default trend */
-			return -EINVAL;
+	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+		acpi_trip = &tz->trips.active[i].trip;
+		if (acpi_trip->valid && !trip_index--) {
+			if (t > acpi_thermal_temp(tz, acpi_trip->temperature)) {
+				*trend = THERMAL_TREND_RAISING;
+				return 0;
+			}
+			break;
 		}
 	}
 
-	/*
-	 * tz->temperature has already been updated by generic thermal layer,
-	 * before this callback being invoked
-	 */
-	i = tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature) +
-	    tz->trips.passive.tc2 * (tz->temperature - tz->trips.passive.temperature);
-
-	if (i > 0)
-		*trend = THERMAL_TREND_RAISING;
-	else if (i < 0)
-		*trend = THERMAL_TREND_DROPPING;
-	else
-		*trend = THERMAL_TREND_STABLE;
-
-	return 0;
+	return -EINVAL;
 }
 
 static void acpi_thermal_zone_device_hot(struct thermal_zone_device *thermal)
@@ -637,7 +581,7 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
 	if (tz->trips.hot.valid)
 		trip++;
 
-	if (tz->trips.passive.valid) {
+	if (tz->trips.passive.trip.valid) {
 		trip++;
 		for (i = 0; i < tz->trips.passive.devices.count; i++) {
 			handle = tz->trips.passive.devices.handles[i];
@@ -662,7 +606,7 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
 	}
 
 	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
-		if (!tz->trips.active[i].valid)
+		if (!tz->trips.active[i].trip.valid)
 			break;
 
 		trip++;
@@ -709,9 +653,6 @@ static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
 	.bind = acpi_thermal_bind_cooling_device,
 	.unbind	= acpi_thermal_unbind_cooling_device,
 	.get_temp = thermal_get_temp,
-	.get_trip_type = thermal_get_trip_type,
-	.get_trip_temp = thermal_get_trip_temp,
-	.get_crit_temp = thermal_get_crit_temp,
 	.get_trend = thermal_get_trend,
 	.hot = acpi_thermal_zone_device_hot,
 	.critical = acpi_thermal_zone_device_critical,
@@ -745,63 +686,97 @@ static void acpi_thermal_zone_sysfs_remove(struct acpi_thermal *tz)
 
 static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
 {
-	int trips = 0;
+	struct acpi_thermal_trip *acpi_trip;
+	struct thermal_trip *trip;
+	int passive_delay = 0;
+	int trip_count = 0;
 	int result;
-	acpi_status status;
 	int i;
 
 	if (tz->trips.critical.valid)
-		trips++;
+		trip_count++;
 
 	if (tz->trips.hot.valid)
-		trips++;
+		trip_count++;
 
-	if (tz->trips.passive.valid)
-		trips++;
+	if (tz->trips.passive.trip.valid) {
+		trip_count++;
+		passive_delay = tz->trips.passive.tsp * 100;
+	}
 
-	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].valid;
-	     i++, trips++);
+	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].trip.valid; i++)
+		trip_count++;
 
-	if (tz->trips.passive.valid)
-		tz->thermal_zone = thermal_zone_device_register("acpitz", trips, 0, tz,
-								&acpi_thermal_zone_ops, NULL,
-								tz->trips.passive.tsp * 100,
-								tz->polling_frequency * 100);
-	else
-		tz->thermal_zone =
-			thermal_zone_device_register("acpitz", trips, 0, tz,
-						     &acpi_thermal_zone_ops, NULL,
-						     0, tz->polling_frequency * 100);
+	trip = kcalloc(trip_count, sizeof(*trip), GFP_KERNEL);
+	if (!trip)
+		return -ENOMEM;
 
-	if (IS_ERR(tz->thermal_zone))
-		return -ENODEV;
+	tz->trip_table = trip;
+
+	if (tz->trips.critical.valid) {
+		trip->type = THERMAL_TRIP_CRITICAL;
+		trip->temperature = acpi_thermal_temp(tz, tz->trips.critical.temperature);
+		trip++;
+	}
+
+	if (tz->trips.hot.valid) {
+		trip->type = THERMAL_TRIP_HOT;
+		trip->temperature = acpi_thermal_temp(tz, tz->trips.hot.temperature);
+		trip++;
+	}
+
+	acpi_trip = &tz->trips.passive.trip;
+	if (acpi_trip->valid) {
+		trip->type = THERMAL_TRIP_PASSIVE;
+		trip->temperature = acpi_thermal_temp(tz, acpi_trip->temperature);
+		trip->priv = acpi_trip;
+		trip++;
+	}
+
+	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+		acpi_trip = &tz->trips.active[i].trip;
+
+		if (!acpi_trip->valid)
+			break;
+
+		trip->type = THERMAL_TRIP_ACTIVE;
+		trip->temperature = acpi_thermal_temp(tz, acpi_trip->temperature);
+		trip->priv = acpi_trip;
+		trip++;
+	}
+
+	tz->thermal_zone = thermal_zone_device_register_with_trips("acpitz",
+								   tz->trip_table,
+								   trip_count,
+								   0, tz,
+								   &acpi_thermal_zone_ops,
+								   NULL,
+								   passive_delay,
+								   tz->polling_frequency * 100);
+	if (IS_ERR(tz->thermal_zone)) {
+		result = PTR_ERR(tz->thermal_zone);
+		goto free_trip_table;
+	}
 
 	result = acpi_thermal_zone_sysfs_add(tz);
 	if (result)
 		goto unregister_tzd;
 
-	status =  acpi_bus_attach_private_data(tz->device->handle,
-					       tz->thermal_zone);
-	if (ACPI_FAILURE(status)) {
-		result = -ENODEV;
-		goto remove_links;
-	}
-
 	result = thermal_zone_device_enable(tz->thermal_zone);
 	if (result)
-		goto acpi_bus_detach;
+		goto remove_links;
 
 	dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
 		 thermal_zone_device_id(tz->thermal_zone));
 
 	return 0;
 
-acpi_bus_detach:
-	acpi_bus_detach_private_data(tz->device->handle);
 remove_links:
 	acpi_thermal_zone_sysfs_remove(tz);
 unregister_tzd:
 	thermal_zone_device_unregister(tz->thermal_zone);
+free_trip_table:
+	kfree(tz->trip_table);
 
 	return result;
 }
@@ -810,8 +785,8 @@ static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
 {
 	acpi_thermal_zone_sysfs_remove(tz);
 	thermal_zone_device_unregister(tz->thermal_zone);
+	kfree(tz->trip_table);
 	tz->thermal_zone = NULL;
-	acpi_bus_detach_private_data(tz->device->handle);
 }
 
 
@@ -819,12 +794,6 @@ static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
                                  Driver Interface
    -------------------------------------------------------------------------- */
 
-static void acpi_queue_thermal_check(struct acpi_thermal *tz)
-{
-	if (!work_pending(&tz->thermal_check_work))
-		queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work);
-}
-
 static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
 {
 	struct acpi_device *device = data;
@@ -838,16 +807,8 @@ static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
 		acpi_queue_thermal_check(tz);
 		break;
 	case ACPI_THERMAL_NOTIFY_THRESHOLDS:
-		acpi_thermal_trips_update(tz, ACPI_TRIPS_THRESHOLDS);
-		acpi_queue_thermal_check(tz);
-		acpi_bus_generate_netlink_event(device->pnp.device_class,
-						dev_name(&device->dev), event, 0);
-		break;
 	case ACPI_THERMAL_NOTIFY_DEVICES:
-		acpi_thermal_trips_update(tz, ACPI_TRIPS_DEVICES);
-		acpi_queue_thermal_check(tz);
-		acpi_bus_generate_netlink_event(device->pnp.device_class,
-						dev_name(&device->dev), event, 0);
+		acpi_thermal_trips_update(tz, event);
 		break;
 	default:
 		acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n",
@@ -1044,7 +1005,7 @@ static int acpi_thermal_suspend(struct device *dev)
 static int acpi_thermal_resume(struct device *dev)
 {
 	struct acpi_thermal *tz;
-	int i, j, power_state, result;
+	int i, j, power_state;
 
 	if (!dev)
 		return -EINVAL;
@@ -1054,18 +1015,12 @@ static int acpi_thermal_resume(struct device *dev)
 		return -EINVAL;
 
 	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
-		if (!tz->trips.active[i].valid)
+		if (!tz->trips.active[i].trip.valid)
 			break;
 
-		tz->trips.active[i].enabled = true;
 		for (j = 0; j < tz->trips.active[i].devices.count; j++) {
-			result = acpi_bus_update_power(
-					tz->trips.active[i].devices.handles[j],
-					&power_state);
-			if (result || (power_state != ACPI_STATE_D0)) {
-				tz->trips.active[i].enabled = false;
-				break;
-			}
+			acpi_bus_update_power(tz->trips.active[i].devices.handles[j],
+					      &power_state);
 		}
 	}
 
@@ -1107,7 +1062,7 @@ static int thermal_act(const struct dmi_system_id *d) {
 static int thermal_nocrt(const struct dmi_system_id *d) {
 	pr_notice("%s detected: disabling all critical thermal trip point actions.\n",
 		  d->ident);
-	nocrt = 1;
+	crt = -1;
 	return 0;
 }
 static int thermal_tzp(const struct dmi_system_id *d) {

drivers/thermal/thermal_core.c

@@ -348,7 +348,8 @@ static void handle_thermal_trip(struct thermal_zone_device *tz, int trip_id)
 	struct thermal_trip trip;
 
 	/* Ignore disabled trip points */
-	if (test_bit(trip_id, &tz->trips_disabled))
+	if (test_bit(trip_id, &tz->trips_disabled) ||
+	    trip.temperature == THERMAL_TEMP_INVALID)
 		return;
 
 	__thermal_zone_get_trip(tz, trip_id, &trip);
@@ -496,6 +497,25 @@ void thermal_zone_device_update(struct thermal_zone_device *tz,
 }
 EXPORT_SYMBOL_GPL(thermal_zone_device_update);
 
+/**
+ * thermal_zone_device_exec - Run a callback under the zone lock.
+ * @tz: Thermal zone.
+ * @cb: Callback to run.
+ * @data: Data to pass to the callback.
+ */
+void thermal_zone_device_exec(struct thermal_zone_device *tz,
+			      void (*cb)(struct thermal_zone_device *,
+					 unsigned long),
+			      unsigned long data)
+{
+	mutex_lock(&tz->lock);
+
+	cb(tz, data);
+
+	mutex_unlock(&tz->lock);
+}
+EXPORT_SYMBOL_GPL(thermal_zone_device_exec);
+
 static void thermal_zone_device_check(struct work_struct *work)
 {
 	struct thermal_zone_device *tz = container_of(work, struct

drivers/thermal/thermal_core.h

@@ -54,10 +54,6 @@ int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *,
 int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *),
 			      void *thermal_governor);
 
-int __for_each_thermal_trip(struct thermal_zone_device *,
-			    int (*cb)(struct thermal_trip *, void *),
-			    void *);
-
 struct thermal_zone_device *thermal_zone_get_by_id(int id);
 
 struct thermal_attr {

drivers/thermal/thermal_trip.c

@@ -9,28 +9,26 @@
  */
 #include "thermal_core.h"
 
-int __for_each_thermal_trip(struct thermal_zone_device *tz,
-			    int (*cb)(struct thermal_trip *, void *),
-			    void *data)
+int for_each_thermal_trip(struct thermal_zone_device *tz,
+			  int (*cb)(struct thermal_trip *, void *),
+			  void *data)
 {
 	int i, ret;
-	struct thermal_trip trip;
 
 	lockdep_assert_held(&tz->lock);
 
+	if (!tz->trips)
+		return -ENODATA;
+
 	for (i = 0; i < tz->num_trips; i++) {
-
-		ret = __thermal_zone_get_trip(tz, i, &trip);
-		if (ret)
-			return ret;
-
-		ret = cb(&trip, data);
+		ret = cb(&tz->trips[i], data);
 		if (ret)
 			return ret;
 	}
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(for_each_thermal_trip);
 
 int thermal_zone_get_num_trips(struct thermal_zone_device *tz)
 {

include/linux/thermal.h

@@ -81,11 +81,13 @@ struct thermal_zone_device_ops {
  * @temperature: temperature value in miliCelsius
  * @hysteresis: relative hysteresis in miliCelsius
  * @type: trip point type
+ * @priv: pointer to driver data associated with this trip
  */
 struct thermal_trip {
 	int temperature;
 	int hysteresis;
 	enum thermal_trip_type type;
+	void *priv;
 };
 
 struct thermal_cooling_device_ops {
@@ -287,6 +289,9 @@ int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id,
 int thermal_zone_set_trip(struct thermal_zone_device *tz, int trip_id,
 			  const struct thermal_trip *trip);
 
+int for_each_thermal_trip(struct thermal_zone_device *tz,
+			  int (*cb)(struct thermal_trip *, void *),
+			  void *data);
 int thermal_zone_get_num_trips(struct thermal_zone_device *tz);
 
 int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp);
@@ -323,6 +328,10 @@ int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
 				       struct thermal_cooling_device *);
 void thermal_zone_device_update(struct thermal_zone_device *,
 				enum thermal_notify_event);
+void thermal_zone_device_exec(struct thermal_zone_device *tz,
+			      void (*cb)(struct thermal_zone_device *,
+					 unsigned long),
+			      unsigned long data);
 
 struct thermal_cooling_device *thermal_cooling_device_register(const char *,
 		void *, const struct thermal_cooling_device_ops *);