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Date: Sun, 27 Oct 2002 13:59:30 -0600 (CST)
From: Sean Kelly <smkelly@zombie.org>
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Subject: kern/44544: Can't kldunload snd_emu10k1.ko
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>Number:         44544
>Category:       kern
>Synopsis:       Can't kldunload snd_emu10k1.ko
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Oct 27 12:00:16 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Sean Kelly
>Release:        FreeBSD 5.0-CURRENT i386
>Organization:
>Environment:
System: FreeBSD edgemaster.zombie.org 5.0-CURRENT FreeBSD 5.0-CURRENT #0: Fri Oct 25 23:27:50 CDT 2002 root@edgemaster.zombie.org:/usr/obj/usr/src/sys/EDGEMASTER i386


FreeBSD Audio Driver (newpcm)
Installed devices:
pcm0: <Creative EMU10K1> at io 0xcc00 irq 10 (4p/2r/4v channels duplex default)

>Description:
	When attempting to `kldunload snd_emu10k1`, my system panic'd with
	"don't do that"

	After looking at kernel source, it looks like this is related to
	pcm not properly dealing with devfs. See destroy_dev() in
	sys/kern/kern_conf.c

>How-To-Repeat:
	1. Load snd_emu10k1.ko
	2. Unload snd_emu10k1.ko
	3. Watch in horror

>Fix:
	Make pcm use devfs properly? Still investigating.
>Release-Note:
>Audit-Trail:
>Unformatted:

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