Kingston Datatraveler G2 failure under amd64 5.0.1

[Dieter Baron <dillo%danbala.tuwien.ac.at@localhost>]

hi,

connecting my Kingston DataTraveler G2 on an amd64 5.0.1 box, I get
the following: 

umass0 at uhub2 port 5 configuration 1 interface 0
umass0: Kingston DataTraveler G2, rev 2.00/1.00, addr 2
umass0: using SCSI over Bulk-Only
scsibus0 at umass0: 2 targets, 1 lun per target
sd0 at scsibus0 target 0 lun 0: <Kingston, DataTraveler G2, 1.00> disk
removable
sd0(umass0:0:0:0): generic HBA error
sd0: drive offline
sd0(umass0:0:0:0): generic HBA Error
sd0(umass0:0:0:0): generic HBA error
sd0: unable to open device, error = 5

  Any ideas what's gonig wrong, or how to deug/fix it?

  I haven't tried -current yet, but can do so if you think it would
help.  However, I would really like a fix I can (easlily) backport to
5.0.1, as it's a production machine.

  Other perhaps relevant information form dmesg:

ohci0 at pci0 dev 18 function 0: vendor 0x1002 product 0x4397 (rev. 0x00)
ohci0: interrupting at ioapic0 pin 16
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
ohci1 at pci0 dev 18 function 1: vendor 0x1002 product 0x4398 (rev. 0x00)
ohci1: interrupting at ioapic0 pin 16
ohci1: OHCI version 1.0, legacy support
usb1 at ohci1: USB revision 1.0
ehci0 at pci0 dev 18 function 2: vendor 0x1002 product 0x4396 (rev. 0x00)
ehci0: applying AMD SB600/SB700 USB freeze workaround
ehci0: interrupting at ioapic0 pin 17
ehci0: dropped intr workaround enabled
ehci0: EHCI version 1.0
ehci0: companion controllers, 3 ports each: ohci0 ohci1
usb2 at ehci0: USB revision 2.0
[...]
uhub2 at usb2: vendor 0x1002 EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub2: 6 ports with 6 removable, self powered


                                        thanks,
                                        dillo