kern/39408: uvisor prevents successful suspend after usage

[Philipp Wollschlegel <folken%kabelsalat.ch@localhost>]

>Number:         39408
>Category:       kern
>Synopsis:       uvisor prevents successful suspend after usage
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Aug 26 22:00:00 +0000 2008
>Originator:     Philipp Wollschlegel
>Release:        NetBSD 4.99.72
>Organization:
        
>Environment:
System: NetBSD tp-node.local 4.99.72 NetBSD 4.99.72 (GENERIC) #0: Mon Aug 25 
02:34:23 PDT 2008 
builds@wb26:/home/builds/ab/HEAD/i386/200808240002Z-obj/home/builds/ab/HEAD/src/sys/arch/i386/compile/GENERIC
 i386
Architecture: i386
Machine: i386
>Description:

Deadlock produced after trying to suspend on X60 Thinkpad after connecting 
a palm centro via usb cable. 

>How-To-Repeat:
First try to suspend with sysctl -w machdep.sleep_state=3 
if successfull resume, 
Plug in Palm PDA with USB cable see visor0 loaded,
Remove Palm usb cable 
Suspending again will result in dead-lock, with the last kernel message
being Syncing Disks...  


>Fix: