kern/56050: xhci suspend/resume is unimplemented

[nia%pkgsrc.org@localhost]

>Number:         56050
>Category:       kern
>Synopsis:       xhci suspend/resume is unimplemented
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Mar 10 08:10:00 +0000 2021
>Originator:     nia
>Release:        NetBSD 9.99.80
>Organization:
>Environment:
NetBSD r 9.99.80 NetBSD 9.99.80 (GENERIC) #0: Fri Mar  5 20:30:56 UTC 2021  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:

>How-To-Repeat:
Attempt to suspend laptop with USB3 (in this case, lenovo x250). USB ports no longer function after successful resume.
>Fix:
xhci_resume and xhci_suspend should probably not be stub functions.

There is an XXX in xhci.c where UHF_PORT_SUSPEND should be handled.