panic when removing pccard

[M. Warner Losh]

In message: <467F7A69.9000909 at cytexbg.com>
            Niki Denev <nike_d at cytexbg.com> writes:
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: M. Warner Losh wrote:
: > I've done some testing with the recently improved in-tree usb stack,
: > and it doesn't panic for me when I remove a CardBus USB card, both
: > with and without devices.  It also does remove the extra /dev/usb*
: > entries properly.  I couldn't cause any crashes with the latest
: > -current.
: > 
: > Warner
: 
: Unfortunately it still does panic for me by simply inserting the card
: (Huawei E630 3g card a.k.a Vodafone Mobile Connect), waiting for the
: usb busses to be added and the ucom0 device to be recognized ( it takes
: a few seconds) and then ejecting the card.
: Again the message is :
: 
:   ucom0: detached
:   (null): at uhub2 port 1 (addr 2) disconnected
: 
:   Fatal trap 12: page fault while in kernel mode
:   fault virtual address   = 0x400
:   fault code              = supervisor read, page not presend
:   instruction pointer     = 0x20:0xc0595b2d
:   stack pointer           = 0x28:0xd2f4db34
:   frame pointer           = 0x28:0xd2f4db5c
:   code segment            = base 0x0, limit 0xfffff, type 0x1b
:                           = DPL 0, pres 1, def32 1, gran 1
:   processor eflags        = interrupt enabled, resume, IOPL = 0
:   current process         = 28 (cbb0 event thread)
:   trap number             = 12
:   panic: page fault
: 
: This problem does not exist if i compile my kernel with the HPS Usb Stack.

I don't suppose you could compile a kernel with DDB and get me a
traceback?

Warner