pcaudio causes MP server to panic

[jnaughto]

Submitter-Id:   net
Originator:      Jason Naughton
Organization:    Home Server
net
Confidential:   no 
Synopsis:       Compiled in pca support.  Usage causes kernel panics.
Severity:       serious 
Priority:       medium 
Category:       Kernel Panic
Class:          sw-bug 
Release:        1.11.1p1-FreeBSD
Environment:
        Compaq Prolient 5000R
        4, Pentium Pro 200Mhz Processors
        256M Ram
System: FreeBSD trooper.jnaughton.com 4.7-RC FreeBSD 4.7-RC #3: Fri Oct 4 
23:38:49 EDT 2002 root@trooper.jnaughton.com:/usr/obj/usr/src/sys/Trooper i386


Description:
        Compiled in pca support for pc speaker audio on Multi-processor
        server.  After installing the kernel rebooted and performed the 
        following instructions:
                cd /dev
                ./MAKEDEV snd0
                ls * > /dev/pcaudio
How-To-Repeat:
        Just echo any characters into pcaudio and a panic occurs.
Fix:
        Commenting out pca support in kernel conf (more of a work-around)