thermal: gov_power_allocator: Simplify checks for valid power actor

There is a need to check if the cooling device in the thermal zone
supports IPA callback and is set for control trip point.
Refactor the code which validates the power actor capabilities and
make it more consistent in all places.

No intentional functional impact.

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/thermal/gov_power_allocator.c

@@ -93,6 +93,13 @@ struct power_allocator_params {
 	struct power_actor *power;
 };
 
+static bool power_actor_is_valid(struct power_allocator_params *params,
+				 struct thermal_instance *instance)
+{
+	return (instance->trip == params->trip_max &&
+		 cdev_is_power_actor(instance->cdev));
+}
+
 /**
  * estimate_sustainable_power() - Estimate the sustainable power of a thermal zone
  * @tz: thermal zone we are operating in
@@ -113,14 +120,10 @@ static u32 estimate_sustainable_power(struct thermal_zone_device *tz)
 	u32 min_power;
 
 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
-		cdev = instance->cdev;
-
-		if (instance->trip != params->trip_max)
-			continue;
-
-		if (!cdev_is_power_actor(cdev))
+		if (!power_actor_is_valid(params, instance))
 			continue;
 
+		cdev = instance->cdev;
 		if (cdev->ops->state2power(cdev, instance->upper, &min_power))
 			continue;
 
@@ -409,8 +412,7 @@ static int allocate_power(struct thermal_zone_device *tz, int control_temp)
 		return -ENODEV;
 
 	list_for_each_entry(instance, &tz->thermal_instances, tz_node)
-		if ((instance->trip == params->trip_max) &&
-		    cdev_is_power_actor(instance->cdev))
+		if (power_actor_is_valid(params, instance))
 			total_weight += instance->weight;
 
 	/* Clean all buffers for new power estimations */
@@ -419,13 +421,10 @@ static int allocate_power(struct thermal_zone_device *tz, int control_temp)
 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
 		struct power_actor *pa = &power[i];
 
-		cdev = instance->cdev;
-
-		if (instance->trip != params->trip_max)
+		if (!power_actor_is_valid(params, instance))
 			continue;
 
-		if (!cdev_is_power_actor(cdev))
-			continue;
+		cdev = instance->cdev;
 
 		ret = cdev->ops->get_requested_power(cdev, &pa->req_power);
 		if (ret)
@@ -459,10 +458,7 @@ static int allocate_power(struct thermal_zone_device *tz, int control_temp)
 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
 		struct power_actor *pa = &power[i];
 
-		if (instance->trip != params->trip_max)
-			continue;
-
-		if (!cdev_is_power_actor(instance->cdev))
+		if (!power_actor_is_valid(params, instance))
 			continue;
 
 		power_actor_set_power(instance->cdev, instance,
@@ -548,12 +544,11 @@ static void allow_maximum_power(struct thermal_zone_device *tz, bool update)
 	u32 req_power;
 
 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
-		cdev = instance->cdev;
-
-		if (instance->trip != params->trip_max ||
-		    !cdev_is_power_actor(instance->cdev))
+		if (!power_actor_is_valid(params, instance))
 			continue;
 
+		cdev = instance->cdev;
+
 		instance->target = 0;
 		mutex_lock(&cdev->lock);
 		/*
@@ -648,8 +643,7 @@ static void power_allocator_update_tz(struct thermal_zone_device *tz,
 	case THERMAL_TZ_BIND_CDEV:
 	case THERMAL_TZ_UNBIND_CDEV:
 		list_for_each_entry(instance, &tz->thermal_instances, tz_node)
-			if ((instance->trip == params->trip_max) &&
-			    cdev_is_power_actor(instance->cdev))
+			if (power_actor_is_valid(params, instance))
 				num_actors++;
 
 		if (num_actors == params->num_actors)