1 files changed, 25 insertions, 46 deletions

diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index a4caf7899f8e..fab11b98ca49 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -95,57 +95,39 @@ static int thermal_of_populate_trip(struct device_node *np,
 
 static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *ntrips)
 {
-	struct thermal_trip *tt;
-	struct device_node *trips;
 	int ret, count;
 
-	trips = of_get_child_by_name(np, "trips");
-	if (!trips) {
-		pr_err("Failed to find 'trips' node\n");
-		return ERR_PTR(-EINVAL);
-	}
+	*ntrips = 0;
+	
+	struct device_node *trips __free(device_node) = of_get_child_by_name(np, "trips");
+	if (!trips)
+		return NULL;
 
 	count = of_get_child_count(trips);
-	if (!count) {
-		pr_err("No trip point defined\n");
-		ret = -EINVAL;
-		goto out_of_node_put;
-	}
+	if (!count)
+		return NULL;
 
-	tt = kzalloc(sizeof(*tt) * count, GFP_KERNEL);
-	if (!tt) {
-		ret = -ENOMEM;
-		goto out_of_node_put;
-	}
-
-	*ntrips = count;
+	struct thermal_trip *tt __free(kfree) = kzalloc(sizeof(*tt) * count, GFP_KERNEL);
+	if (!tt)
+		return ERR_PTR(-ENOMEM);
 
 	count = 0;
 	for_each_child_of_node_scoped(trips, trip) {
 		ret = thermal_of_populate_trip(trip, &tt[count++]);
 		if (ret)
-			goto out_kfree;
+			return ERR_PTR(ret);
 	}
 
-	of_node_put(trips);
-
-	return tt;
-
-out_kfree:
-	kfree(tt);
-	*ntrips = 0;
-out_of_node_put:
-	of_node_put(trips);
+	*ntrips = count;
 
-	return ERR_PTR(ret);
+	return no_free_ptr(tt);
 }
 
 static struct device_node *of_thermal_zone_find(struct device_node *sensor, int id)
 {
-	struct device_node *np, *tz;
 	struct of_phandle_args sensor_specs;
 
-	np = of_find_node_by_name(NULL, "thermal-zones");
+	struct device_node *np __free(device_node) = of_find_node_by_name(NULL, "thermal-zones");
 	if (!np) {
 		pr_debug("No thermal zones description\n");
 		return ERR_PTR(-ENODEV);
@@ -163,8 +145,7 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int
 						   "#thermal-sensor-cells");
 		if (count <= 0) {
 			pr_err("%pOFn: missing thermal sensor\n", child);
-			tz = ERR_PTR(-EINVAL);
-			goto out;
+			return ERR_PTR(-EINVAL);
 		}
 
 		for (i = 0; i < count; i++) {
@@ -176,22 +157,18 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int
 							 i, &sensor_specs);
 			if (ret < 0) {
 				pr_err("%pOFn: Failed to read thermal-sensors cells: %d\n", child, ret);
-				tz = ERR_PTR(ret);
-				goto out;
+				return ERR_PTR(ret);
 			}
 
 			if ((sensor == sensor_specs.np) && id == (sensor_specs.args_count ?
 								  sensor_specs.args[0] : 0)) {
 				pr_debug("sensor %pOFn id=%d belongs to %pOFn\n", sensor, id, child);
-				tz = no_free_ptr(child);
-				goto out;
+				return no_free_ptr(child);
 			}
 		}
 	}
-	tz = ERR_PTR(-ENODEV);
-out:
-	of_node_put(np);
-	return tz;
+
+	return ERR_PTR(-ENODEV);
 }
 
 static int thermal_of_monitor_init(struct device_node *np, int *delay, int *pdelay)
@@ -301,7 +278,7 @@ static bool thermal_of_should_bind(struct thermal_zone_device *tz,
 				   struct thermal_cooling_device *cdev,
 				   struct cooling_spec *c)
 {
-	struct device_node *tz_np, *cm_np, *child;
+	struct device_node *tz_np, *cm_np;
 	bool result = false;
 
 	tz_np = thermal_of_zone_get_by_name(tz);
@@ -315,7 +292,7 @@ static bool thermal_of_should_bind(struct thermal_zone_device *tz,
 		goto out;
 
 	/* Look up the trip and the cdev in the cooling maps. */
-	for_each_child_of_node(cm_np, child) {
+	for_each_child_of_node_scoped(cm_np, child) {
 		struct device_node *tr_np;
 		int count, i;
 
@@ -334,7 +311,6 @@ static bool thermal_of_should_bind(struct thermal_zone_device *tz,
 				break;
 		}
 
-		of_node_put(child);
 		break;
 	}
 
@@ -401,11 +377,14 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node *
 
 	trips = thermal_of_trips_init(np, &ntrips);
 	if (IS_ERR(trips)) {
-		pr_err("Failed to find trip points for %pOFn id=%d\n", sensor, id);
+		pr_err("Failed to parse trip points for %pOFn id=%d\n", sensor, id);
 		ret = PTR_ERR(trips);
 		goto out_of_node_put;
 	}
 
+	if (!trips)
+		pr_info("No trip points found for %pOFn id=%d\n", sensor, id);
+
 	ret = thermal_of_monitor_init(np, &delay, &pdelay);
 	if (ret) {
 		pr_err("Failed to initialize monitoring delays from %pOFn\n", np);