From: Arvind Yadav arvind.yadav.cs@gmail.com
[ Upstream commit 2d803dc8f7a5f622ac47c3b650834ada3a2659b9 ]
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 Signed-off-by: Sasha Levin alexander.levin@microsoft.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 db70cee71caa..07600af0084d 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -574,7 +574,8 @@ 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, sizeof(unsigned int) * @@ -618,6 +619,7 @@ err_init: mutex_unlock(&devfreq_list_lock);
device_unregister(&devfreq->dev); + devfreq = NULL; err_dev: if (devfreq) kfree(devfreq);