> Once device_register() failed, we should call put_device() to > decrement reference count for cleanup. Or it could cause memory leak. > > device_register() includes device_add(). As comment of device_add() … I doubt that the information from the second description paragraph is helpful for this issue. > Found by code review. Would you become interested to check how many similar control flows can still be detected by the means of automated advanced source code analyses? Regards, Markus