recent USB MFCs cause panics

[Helge Oldach]

Julian Elischer:
> >#6  0xc016f772 in device_get_ivars (dev=0x0) at /usr/src/sys/kern/subr_bus.c:998
> >#7  0xc0237d5d in usb_disconnect_port (up=0xc18971c4, parent=0xc1897280)
> >    at /usr/src/sys/dev/usb/usb_subr.c:1440
> >  
> >
> can you go to this frame
> "up 7"
> and print dev and  i and *dev

(kgdb) up 7
#7  0xc0237d5d in usb_disconnect_port (up=0xc18971c4, parent=0xc1897280)
    at /usr/src/sys/dev/usb/usb_subr.c:1440
1440                            config_detach(dev->subdevs[i], DETACH_FORCE);
(kgdb) print dev
$1 = 0x0
(kgdb) print i
$2 = 0
(kgdb) print *dev
Cannot access memory at address 0x0.
(kgdb) 

Helge