Re: [syzbot] possible deadlock in worker_thread

[Tejun Heo]

Hello,

On Mon, Feb 14, 2022 at 10:08:00AM +0900, Tetsuo Handa wrote:
> +	destroy_workqueue(srp_tl_err_wq);
> 
> Then, we can call WARN_ON() if e.g. flush_workqueue() is called on system-wide workqueues.

Yeah, this is the right thing to do. It makes no sense at all to call
flush_workqueue() on the shared workqueues as the caller has no idea what
it's gonna end up waiting for. It was on my todo list a long while ago but
slipped through the crack. If anyone wanna take a stab at it (including
scrubbing the existing users, of course), please be my guest.

Thanks.

-- 
tejun