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Subject[PATCH] PM / devfreq: use put_device() instead of kfree()
Date
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>
---
drivers/devfreq/devfreq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index fe2af6a..a225b94 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 = devm_kzalloc(&devfreq->dev,
@@ -671,6 +672,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
mutex_unlock(&devfreq_list_lock);

device_unregister(&devfreq->dev);
+ devfreq = NULL;
err_dev:
if (devfreq)
kfree(devfreq);
--
2.7.4
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