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Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/cpu_cooling.c12
1 files changed, 12 insertions, 0 deletions
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);