From: Arvind Yadav <arvind.yadav...@gmail.com> Date: Fri, 9 Mar 2018 16:11:17 +0530
> if device_register() returned an error! Always use put_device() > to give up the reference initialized. > > Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com> I do not see anything giving cls_dev an initial non-zero reference count before this device_register() call. And I have no idea why you use a "!" when saying 'error' you this commit log message.