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Re: DDB not working with USB keyboard at xhci port

On 2017/08/22 16:57, Nick Hudson wrote:
> 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...
>>> Nick
>> Yes, it works.
>> It's a good idea.
>> Thank you.
> I committed it. Thanks for the report and testing.

Thank you for fixing this problem.
Could you pull-up this patch to netbsd-7 branch?
netbsd-7 (NOT netbsd-7-0, netbsd-7-1) has same problem.
Your patch can work with netbsd-7 tree, too.


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