Re: [PATCH] xhci: Disable connect, disconnect and over-current wakeup on system suspend

[Kai-Heng Feng]

On Thu, Aug 17, 2023 at 10:22 PM Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Thu, Aug 17, 2023 at 10:07:37AM -0400, Alan Stern wrote:
> > On Thu, Aug 17, 2023 at 05:33:05PM +0800, Kai-Heng Feng wrote:
> > > HP ProOne 440 G10 AIO sometimes cannot suspend as xHCI wakes up the
> > > system:
> > > [  445.814574] hub 2-0:1.0: hub_suspend
> > > [  445.814652] usb usb2: bus suspend, wakeup 0
> > > [  445.824629] xhci_hcd 0000:00:14.0: Port change event, 1-11, id 11, portsc: 0x202a0
> >
> > What is the meaning of the 0x202a0 bits?  What caused this wakeup?
>
> And more to the point, given that the previous line says "wakeup 0", why
> should any port change event cause a wakeup?

I think the controller and roothub have to deal with the interrupt
about disconnecting regardless of the remote wakeup setting.

Kai-Heng

>
> Alan Stern