i386/64680: 5.2.1 pci-cfgintr steals serial mouse irq

[Jack Zvonik]

>Number:         64680
>Category:       i386
>Synopsis:       5.2.1 pci-cfgintr steals serial mouse irq
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Mar 24 20:20:11 PST 2004
>Closed-Date:
>Last-Modified:
>Originator:     Jack Zvonik
>Release:        5.2.1
>Organization:
Motorola
>Environment:
Freebsd 5.2.1-release #2 (the stock 5.2.1 kernel is the original)
>Description:
I install 5.1 and the serial mouse works fine and gets irq4 on a PII266
and 440LX chipset but when I install 5.2.1, the irq gets taken by 
pci-cfgintr and the mouse cannot get irq4. Checking Google news, I see
that jhb has worked in pci_cfgreg.c for similar issues.

Plus your web site would not work with Mozilla Firebird 0.7 (win)
It wouldn't take the graphic code. 
 
>How-To-Repeat:

>Fix:
 I took the pci_cfgreg.c from the 5.1 install and put it in the 5.2.1
install and recompiled the kernel (with some hopefully nonessential
config changes, I removed the commmented out pci line) and it worked.
I got irq4 for the serial mouse and dmesg looks ok. The commented
out pci line was tried first in a recompile of the kernel so I'm
pretty sure that it's the .c file.
>Release-Note:
>Audit-Trail:
>Unformatted: