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Re: DDB not working with USB keyboard at xhci port

On 08/22/17 17:08, sc dying wrote:
On Tue, Aug 22, 2017 at 2:18 PM, Nick Hudson <> wrote:
On 08/21/17 14:56, sc dying wrote:
On 2017/08/21 12:00, Nick Hudson wrote:
On 08/16/17 06:42, sc dying wrote:
When ukbd(4) is a console and connected to USB3 port, you can enter
into DDB by pressing ALT+CTRL+ESC but console freezes.
(on HEAD, netbsd-7, netbsd-8)

xhci has two buses, sc->sc_bus is for usb3 and sc->sc_bus2 is for
usb2.  ukbd is usually connected at Low-Speed, so usbd_set_polling
sets sc->sc_bus2->ub_usepolling.
However, xhci.c checks only sc->sc_bus->ub_usepolling, that's why
xhci_poll does not call xhci_softintr.

I can show a quick dirty patch.
It assumes ub_usepolling is always set by ukbd at LS/FS/HS.
Can you test this patch please?
It does not work.

This patch helps xhci.c but does not usb_schedsoftintr in usb.c.

How about this? It's still all pretty ugly, but this should now work...

Yes, it works.
It's a good idea.

Thank you.

I committed it. Thanks for the report and testing.


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