Hi. See pr kern/43462. Happens to me. I wish it would get fixed :)
On Sun, 6 Oct 2002, Brian Fundakowski Feldman wrote:
> I can't get more info because crash dumps don't work when this happens, but
> for what it's worth, here's a traceback which shows what happens when I
> attempt to use my da0: <SanDisk ImageMate II 1.30> Removable Direct Access
> SCSI-2 device on an OHCI-based controller. This was working just a few days
> ago with a UHCI controller, so ...
>
> The crash is from an invalid read at 0xbff3e000, which is PTmap plus some
> offset. The trace as far as I can get it, from a kernel with USB but no
> "options"
> enabled, would be:
>
> ohci_alloc_std_chain+0xf5 (calling a DMAADDR() function, I believe)
> ohci_device_bulk_start+0x0d
> ohci_device_bulk_transfer+0x27
> usbd_transfer+0xc0
> umass_setup_transfer+0x4f
> umass_bbb_state
> usb_transfer_complete
> ohci_softintr
>
> Can anyone confirm if this is normal or I have an exceptional system? I
> have two completely unrelated OHCI-based controllers in my system and
> neither works.
>
>
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