panic in usb_transfer_complete in vmware

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Hey,

just tried booting 1.4 (snaphot) in vmware.  it works normally, but if 
I have my usb stick passed through to dragonfly, it panics like below 
(I think that's the same panic sascha is seeing).

A little bit playing with ddb showed that pipe->queue is empty.

cheers
  simon


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x4c
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc043c0bf
stack pointer           = 0x10:0xc9a6ec90
frame pointer           = 0x10:0xc9a6ecb0
code segment            = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, IOPL = 0
current process         = Idle
current thread          = pri 92 (CRIT)

kernel: type 12 trap, code=0
Stopped at      usb_transfer_complete+0xab:     movl    0x4c(%eax),%eax
db> trace
usb_transfer_complete(c1189f38,c9a72fc0,0,0,e333fc0) at 
usb_transfer_complete+0xab
ohci_softintr(c99fb0c0,c9a6ed10,c0436da2,c99fb0c0,e333f90) at 
ohci_softintr+0x11c
usb_schedsoftintr(c99fb0c0,e333f90,0,0,0) at usb_schedsoftintr+0x12
ohci_intr1(c99fb0c0,c9a6ed84,c029054b,c99fb0c0,0) at ohci_intr1+0x16f
ohci_intr(c99fb0c0,0,0,0,1) at ohci_intr+0x33
ithread_handler(9,0,0,0,0) at ithread_handler+0xa0
lwkt_exit() at lwkt_exit

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