iptables: use match, target and data copy_to_user helpers

[linux.git] / drivers / devfreq / devfreq.c

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 478006b7764a5919259e8b582dedfd3a1f5358f5..a324801d6a664cd707d70d673611cade4d43bd9d 100644 (file)
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -137,6 +137,10 @@ static int devfreq_update_status(struct devfreq *devfreq, unsigned long freq)
 
        cur_time = jiffies;
 
+       /* Immediately exit if previous_freq is not initialized yet. */
+       if (!devfreq->previous_freq)
+               goto out;
+
        prev_lev = devfreq_get_freq_level(devfreq, devfreq->previous_freq);
        if (prev_lev < 0) {
                ret = prev_lev;
@@ -594,17 +598,19 @@ struct devfreq *devfreq_add_device(struct device *dev,
        if (devfreq->governor)
                err = devfreq->governor->event_handler(devfreq,
                                        DEVFREQ_GOV_START, NULL);
-       mutex_unlock(&devfreq_list_lock);
        if (err) {
                dev_err(dev, "%s: Unable to start governor for the device\n",
                        __func__);
                goto err_init;
        }
+       mutex_unlock(&devfreq_list_lock);
 
        return devfreq;
 
 err_init:
        list_del(&devfreq->node);
+       mutex_unlock(&devfreq_list_lock);
+
        device_unregister(&devfreq->dev);
 err_out:
        return ERR_PTR(err);
@@ -844,7 +850,7 @@ err_out:
 EXPORT_SYMBOL(devfreq_add_governor);
 
 /**
- * devfreq_remove_device() - Remove devfreq feature from a device.
+ * devfreq_remove_governor() - Remove devfreq feature from a device.
  * @governor:  the devfreq governor to be removed
  */
 int devfreq_remove_governor(struct devfreq_governor *governor)