kern/50348: On usb.ko unload usb and usbN devices are not destroyed.

[Nicolai Petri]

>Number:         50348
>Category:       kern
>Synopsis:       On usb.ko unload usb and usbN devices are not destroyed.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Mar 27 07:20:05 PST 2003
>Closed-Date:
>Last-Modified:
>Originator:     Nicolai Petri
>Release:        FreeBSD 5.0-CURRENT i386
>Organization:
catpipe Systems ApS, Denmark
>Environment:
System: FreeBSD d-montest.catpipe.net 5.0-CURRENT FreeBSD 5.0-CURRENT #1: Sun Mar 23 21:34:13 CET 2003 root at d-montest.catpipe.net:/data/obj/data/5.0-src/sys/MYKERN i386


>Description:
	When loading usb.ko 2 devices is created for each found usb controller,
	these devices are not destroyed on usb.ko unload. This leads to
	a kernel panic when accessing /dev/usb* using tools like usbdevs.
>How-To-Repeat:
	kldload usb
	kldunload usb
	usbdevs -v; #instant panic
>Fix:
	Register dev_t for each invocation of make_dev (in the softc ?)
	and call destroy_dev on unload.

>Release-Note:
>Audit-Trail:
>Unformatted: