PM / devfreq: use put_device() instead of kfree()

Never directly free @dev after calling device_register() or
device_unregister(), even if device_register() returned an error.
Always use put_device() to give up the reference initialized.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 0b5b3abe054e..e26adf67e218 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -625,7 +625,8 @@ struct devfreq *devfreq_add_device(struct device *dev,
         err = device_register(&devfreq->dev);
         if (err) {
                 mutex_unlock(&devfreq->lock);
-                goto err_dev;
+                put_device(&devfreq->dev);
+                goto err_out;
         }
 
         devfreq->trans_table =
@@ -672,6 +673,7 @@ err_init:
         mutex_unlock(&devfreq_list_lock);
 
         device_unregister(&devfreq->dev);
+        devfreq = NULL;
 err_dev:
         if (devfreq)
                 kfree(devfreq);