kern/41175: ath(4) crash on boot on 5.99.10 booting without ACPI

[evaldo%gardenali.biz@localhost]

>Number:         41175
>Category:       kern
>Synopsis:       ath(4) crash on boot on 5.99.10 booting without ACPI
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Apr 09 04:05:00 +0000 2009
>Originator:     Evaldo Gardenali
>Release:        5.99.10 checked out 20090408 evening UTC
>Organization:
>Environment:
>Description:
ath(4) crashes on kernel boot on i386 and amd64 booting without ACPI. 

ACPI disabled because of yet another bug which disables a whole PCI bus when 
ACPI enabled. Booting without ACPI and without SMP triggers another possible 
problem and gives me no usable keyboard, and I am away from a lab facility to 
try some networked tests.

amd64 shown on the following images:
http://evaldo.gardenali.biz/NetBSD-5.99.10-amd64/DSCN1719.JPG
http://evaldo.gardenali.biz/NetBSD-5.99.10-amd64/DSCN1721.JPG

Will conduct some more tests, adding information as soon as possible.
Sometimes the crash backtrace looks different.
>How-To-Repeat:
Boot NetBSD/i386 or NetBSD/amd64 with ACPI disabled
Watch the fireworks

>Fix: