diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index 4b9be532cb14..bb32ca0056c4 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -64,6 +64,11 @@ static struct cpufreq_cooling_device *notify_device;
  * get_idr - function to get a unique id.
  * @idr: struct idr * handle used to create a id.
  * @id: int * value generated by this function.
+ *
+ * This function will populate @id with an unique
+ * id, using the idr API.
+ *
+ * Return: 0 on success, an error code on failure.
  */
 static int get_idr(struct idr *idr, int *id)
 {
@@ -75,6 +80,7 @@ static int get_idr(struct idr *idr, int *id)
 	if (unlikely(ret < 0))
 		return ret;
 	*id = ret;
+
 	return 0;
 }
 
@@ -105,6 +111,7 @@ static void release_idr(struct idr *idr, int id)
 static int is_cpufreq_valid(int cpu)
 {
 	struct cpufreq_policy policy;
+
 	return !cpufreq_get_policy(&policy, cpu);
 }
 
@@ -200,6 +207,7 @@ static int get_property(unsigned int cpu, unsigned long input,
 		}
 		j++;
 	}
+
 	return -EINVAL;
 }
 
@@ -220,6 +228,7 @@ unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq)
 
 	if (get_property(cpu, (unsigned long)freq, &val, GET_LEVEL))
 		return THERMAL_CSTATE_INVALID;
+
 	return (unsigned long)val;
 }
 EXPORT_SYMBOL_GPL(cpufreq_cooling_get_level);
@@ -244,6 +253,7 @@ static unsigned int get_cpu_frequency(unsigned int cpu, unsigned long level)
 	ret = get_property(cpu, level, &freq, GET_FREQ);
 	if (ret)
 		return 0;
+
 	return freq;
 }
 
@@ -372,6 +382,7 @@ static int cpufreq_get_cur_state(struct thermal_cooling_device *cdev,
 	struct cpufreq_cooling_device *cpufreq_device = cdev->devdata;
 
 	*state = cpufreq_device->cpufreq_state;
+
 	return 0;
 }
 
@@ -474,6 +485,7 @@ struct thermal_cooling_device *cpufreq_cooling_register(
 	cpufreq_dev_count++;
 
 	mutex_unlock(&cooling_cpufreq_lock);
+
 	return cool_dev;
 }
 EXPORT_SYMBOL_GPL(cpufreq_cooling_register);