kern/38618: HP iPAQ 514 in umass mode is not usable and could panic the machine

[svs%ropnet.ru@localhost]

>Number:         38618
>Category:       kern
>Synopsis:       HP iPAQ 514 in umass mode is not usable and could panic the 
>machine
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri May 09 19:50:00 +0000 2008
>Originator:     Sergey Svishchev
>Release:        4.0
>Organization:
>Environment:
i386
>Description:
HP iPAQ 514 is a Windows Mobile 6 phone with a microSD card slot and mini-USB 
port.  It can be used in ActiveSync mode or mass storage mode.

ehci0 at pci0 dev 29 function 7: Intel 82801EB/ER USB EHCI Controller (rev. 
0x02)
ehci0: interrupting at irq 10
ehci0: BIOS has given up ownership
ehci0: EHCI version 1.0
ehci0: companion controllers, 2 ports each: uhci0 uhci1 uhci2 uhci3
usb4 at ehci0: USB revision 2.0

ehci0: handing over full speed device on port 5 to uhci2
uhub4: port 5, device disappeared after reset
umass2 at uhub2 port 1 configuration 1 interface 0
umass2: Hewlett Packard product 0xce04, rev 2.00/0.00, addr 2
umass2: using SCSI over Bulk-Only
scsibus2 at umass2: 2 targets, 1 lun per target
sd1 at scsibus2 target 0 lun 0: <HP iPAQ, , > disk removable
<long pause>
sd1: fabricating a geometry
sd1: 486 MB, 486 cyl, 64 head, 32 sec, 512 bytes/sect x 996352 sectors

If I pull out USB cable during long pause, machine panics.  If I wait and then 
run fdisk, disklabel (etc.), these commands sleep forever in xscmd, dkoplk or 
getxs state.
>How-To-Repeat:

>Fix: