1 files changed, 37 insertions, 32 deletions

diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c
index d9f4e26ec125..b1152ad7acc9 100644
--- a/drivers/thermal/thermal_helpers.c
+++ b/drivers/thermal/thermal_helpers.c
@@ -39,32 +39,31 @@ int get_tz_trend(struct thermal_zone_device *tz, const struct thermal_trip *trip
 	return trend;
 }
 
-struct thermal_instance *
-get_thermal_instance(struct thermal_zone_device *tz,
-		     struct thermal_cooling_device *cdev, int trip_index)
+static bool thermal_instance_present(struct thermal_zone_device *tz,
+				     struct thermal_cooling_device *cdev,
+				     const struct thermal_trip *trip)
 {
-	struct thermal_instance *pos = NULL;
-	struct thermal_instance *target_instance = NULL;
-	const struct thermal_trip *trip;
+	const struct thermal_trip_desc *td = trip_to_trip_desc(trip);
+	struct thermal_instance *ti;
 
-	mutex_lock(&tz->lock);
-	mutex_lock(&cdev->lock);
-
-	trip = &tz->trips[trip_index].trip;
-
-	list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
-		if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
-			target_instance = pos;
-			break;
-		}
+	list_for_each_entry(ti, &td->thermal_instances, trip_node) {
+		if (ti->cdev == cdev)
+			return true;
 	}
 
-	mutex_unlock(&cdev->lock);
-	mutex_unlock(&tz->lock);
+	return false;
+}
+
+bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,
+				   const struct thermal_trip *trip,
+				   struct thermal_cooling_device *cdev)
+{
+	guard(thermal_zone)(tz);
+	guard(cooling_dev)(cdev);
 
-	return target_instance;
+	return thermal_instance_present(tz, cdev, trip);
 }
-EXPORT_SYMBOL(get_thermal_instance);
+EXPORT_SYMBOL_GPL(thermal_trip_is_bound_to_cdev);
 
 /**
  * __thermal_zone_get_temp() - returns the temperature of a thermal zone
@@ -132,17 +131,14 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
 	if (IS_ERR_OR_NULL(tz))
 		return -EINVAL;
 
-	mutex_lock(&tz->lock);
+	guard(thermal_zone)(tz);
 
-	if (!tz->ops.get_temp) {
-		ret = -EINVAL;
-		goto unlock;
-	}
+	if (!tz->ops.get_temp)
+		return -EINVAL;
 
 	ret = __thermal_zone_get_temp(tz, temp);
-
-unlock:
-	mutex_unlock(&tz->lock);
+	if (!ret && *temp <= THERMAL_TEMP_INVALID)
+		return -ENODATA;
 
 	return ret;
 }
@@ -174,8 +170,6 @@ void __thermal_cdev_update(struct thermal_cooling_device *cdev)
 
 	/* Make sure cdev enters the deepest cooling state */
 	list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) {
-		dev_dbg(&cdev->device, "zone%d->target=%lu\n",
-			instance->tz->id, instance->target);
 		if (instance->target == THERMAL_NO_TARGET)
 			continue;
 		if (instance->target > target)
@@ -196,12 +190,23 @@ void __thermal_cdev_update(struct thermal_cooling_device *cdev)
  */
 void thermal_cdev_update(struct thermal_cooling_device *cdev)
 {
-	mutex_lock(&cdev->lock);
+	guard(cooling_dev)(cdev);
+
 	if (!cdev->updated) {
 		__thermal_cdev_update(cdev);
 		cdev->updated = true;
 	}
-	mutex_unlock(&cdev->lock);
+}
+
+/**
+ * thermal_cdev_update_nocheck() - Unconditionally update cooling device state
+ * @cdev: Target cooling device.
+ */
+void thermal_cdev_update_nocheck(struct thermal_cooling_device *cdev)
+{
+	guard(cooling_dev)(cdev);
+
+	__thermal_cdev_update(cdev);
 }
 
 /**