PM / devfreq: devm_kzalloc to have dev pointer more precisely

devm_kzalloc of devfreq's statistics data structure has been
using its parent device as the dev allocated for.
If a device's devfreq is disabled in run-time,
such allocated memory won't be freed.

Desginating more precisely with the devfreq device
pointer fixes the issue.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 1d6c803..3801737 100644 (file)
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -561,15 +561,6 @@ struct devfreq *devfreq_add_device(struct device *dev,
                mutex_lock(&devfreq->lock);
        }
 
-       devfreq->trans_table =  devm_kzalloc(dev, sizeof(unsigned int) *
-                                               devfreq->profile->max_state *
-                                               devfreq->profile->max_state,
-                                               GFP_KERNEL);
-       devfreq->time_in_state = devm_kzalloc(dev, sizeof(unsigned long) *
-                                               devfreq->profile->max_state,
-                                               GFP_KERNEL);
-       devfreq->last_stat_updated = jiffies;
-
        dev_set_name(&devfreq->dev, "%s", dev_name(dev));
        err = device_register(&devfreq->dev);
        if (err) {
@@ -578,6 +569,15 @@ struct devfreq *devfreq_add_device(struct device *dev,
                goto err_out;
        }
 
+       devfreq->trans_table =  devm_kzalloc(&devfreq->dev, sizeof(unsigned int) *
+                                               devfreq->profile->max_state *
+                                               devfreq->profile->max_state,
+                                               GFP_KERNEL);
+       devfreq->time_in_state = devm_kzalloc(&devfreq->dev, sizeof(unsigned long) *
+                                               devfreq->profile->max_state,
+                                               GFP_KERNEL);
+       devfreq->last_stat_updated = jiffies;
+
        srcu_init_notifier_head(&devfreq->transition_notifier_list);
 
        mutex_unlock(&devfreq->lock);