kern/56654: xhci: panic: kernel diagnostic assertion "xr != NULL" failed: file "/usr/src/sys/dev/usb/xhci.c", line 2351

[nia%pkgsrc.org@localhost]

>Number:         56654
>Category:       kern
>Synopsis:       xhci:  panic: kernel diagnostic assertion "xr != NULL" failed: file "/usr/src/sys/dev/usb/xhci.c", line 2351
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jan 23 08:25:00 +0000 2022
>Originator:     nia
>Release:        9.99.93
>Organization:
The NetBSD Foundation
>Environment:
NetBSD amnesia 9.99.93 NetBSD 9.99.93 (GENERIC) #0: Wed Dec 29 07:40:52 UTC 2021  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd6
>Description:
panic: kernel diagnostic assertion "xr != NULL" failed: file "/usr/src/sys/dev/usb/xhci.c", line 2351


no trace available (yet) ["bad namelist"]
>How-To-Repeat:
open audacity some times with an uaudio at xhci
>Fix:
switch BIOS to legacy mode