kern/46617: lockup on usb mouse attach

[martin%NetBSD.org@localhost]

>Number:         46617
>Category:       kern
>Synopsis:       lockup on usb mouse attach
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jun 20 07:25:00 +0000 2012
>Originator:     Martin Husemann
>Release:        NetBSD 6.99.7
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD whoever-brings-the-night.aprisoft.de 6.99.7 NetBSD 6.99.7 
(MODULAR) #189: Mon Jun 18 11:01:49 CEST 2012 
martin%emmas.aprisoft.de@localhost:/nelly/usr/src/sys/arch/sparc64/compile/MODULAR
 sparc64
Architecture: sparc64
Machine: sparc64
>Description:

Since the usbmp merge I often (but not always) get a full system lockup when
attaching a usb mouse after boot. I can't get into ddb, machine seems to be
completely locked up.

>How-To-Repeat:
I can reproduce it like 70% of the tries, especially when plugging in a mouse
and keyboard simultaneously.

>Fix:
n/a