> Yes. It is not safe, so I 'must wait_event_timeout before free cookie'.... > But is there a safe way to do it? > Maybe: > ->allocate cookie > -> map it to an unique id > ->set the id to req->cookie > ->receive response and check id valid? Then access cookie? This is part of why adding cookies in a separate patch with a good commit message is important. Please take a step back. What is the big picture? Why do you need a cookie? What is it used for? If you describe what your requirements are, we might be able to suggest a better solution, or point you at a driver you can copy code from. Andrew
