kern/63351: ums doesn't detatch completely? Reattach panics.

[David Gilbert]

>Number:         63351
>Category:       kern
>Synopsis:       ums doesn't detatch completely?  Reattach panics.
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Feb 25 06:50:01 PST 2004
>Closed-Date:
>Last-Modified:
>Originator:     David Gilbert
>Release:        FreeBSD 5.2-CURRENT i386
>Organization:
DaveG.ca
>Environment:
System: FreeBSD canoe.dclg.ca 5.2-CURRENT FreeBSD 5.2-CURRENT #1: Mon Feb 23 19:57:40 EST 2004 dgilbert at canoe.dclg.ca:/usr/obj/usr/src/sys/CANOE i386


cvsup and world in the last 24 hours.
>Description:
This behaviour is fairly recent.  I have a laptop with an internal psm0
device and several USB ports.  At home, I have one mouse plugged into
one usb port.  For travelling on the train, I have another mouse and
due to the geometry of the situation, I plug it into another usb
port.

When I leave the house, I unplug the house mouse, and close the laptop
... note that it doesn't suspend.  I've set the acpi lid_button to
"NONE" ... meaning it doesn't even try.

when I get on the train, I open the laptop and plug in the train
mouse.  As soon as this tries to attach, I get the included panic.
This is recent behaviour ... but I'm not positive how recent.
Within the last couple of weeks, I beleive.

Here's the data from the crash dump:

panic: make_dev() by driver ums on pre-existing device (maj=0, min=0, name=console)
at line 492 in file /usr/src/sys/kern/kern_conf.c

(kgdb) bt
#0  doadump () at /usr/src/sys/kern/kern_shutdown.c:240
#1  0xc0516b31 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:374
#2  0xc0516dcc in poweroff_wait (junk=0xc067c6ea, howto=492)
    at /usr/src/sys/kern/kern_shutdown.c:552
#3  0xc04fc200 in make_dev (devsw=0xc1e81540, minornr=-543685724, uid=0, 
    gid=0, perms=0, fmt=0xc0674ec4 "ums%d")
    at /usr/src/sys/kern/kern_conf.c:490
#4  0xc04d87ee in ums_attach (self=0xc6b4f880)
    at /usr/src/sys/dev/usb/ums.c:356
#5  0xc0529f05 in device_probe_and_attach (dev=0xc6b4f880) at device_if.h:39
#6  0xc04dc0ed in usbd_probe_and_attach (parent=0xc5dea800, dev=0xc6a98800, 
    port=2, addr=2) at /usr/src/sys/dev/usb/usb_subr.c:900
#7  0xc04dc4cb in usbd_new_device (parent=0xc5dea800, bus=0xc5df5000, depth=0, 
    speed=1, port=2, up=0xc5dea7c0) at /usr/src/sys/dev/usb/usb_subr.c:1114
#8  0xc04d4325 in uhub_explore (dev=0xc5dea900)
    at /usr/src/sys/dev/usb/uhub.c:480
#9  0xc04da91f in usb_discover (v=0xc5dde940) at /usr/src/sys/dev/usb/usb.c:717
#10 0xc04da416 in usb_event_thread (arg=0xc5dde940)
    at /usr/src/sys/dev/usb/usb.c:410
#11 0xc0506b48 in fork_exit (callout=0xc04da3cc <usb_event_thread>, 
    arg=0xc5dde940, frame=0xdf980d48) at /usr/src/sys/kern/kern_fork.c:802

>How-To-Repeat:
As above.
>Fix:

None.


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