On Tue, Dec 21, 2021 at 11:35:25AM +0800, Kai-Heng Feng wrote: > ( > > > On Fri, Nov 26, 2021 at 11:30 PM Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > Why is it correct to skip doing a warm reset on a disconnected port here, but not > > correct to skip doing a warm reset on a disconnected port in all the other places > > where hub_port_warm_reset_required() gets called? > > Can a disconnect event happens to other places other than port_event()? A disconnect can happen at any time. After all, users can unplug USB cables whenever they want. Alan Stern