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    SubjectRe: Oops in UHCI when encountering "host controller process error"
    On Tue, 9 Dec 2008, Jeremy Fitzhardinge wrote:

    > Yep, there's something very odd going on in there. By contrast, does
    > this look OK? The allocations are fine, but I'm wondering if the
    > skeleton QH stuff is all correct; it seems to work OK in this state.
    >
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4000 handle=7e212000
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4080 handle=7e212080
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4100 handle=7e212100
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4180 handle=7e212180
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4200 handle=7e212200
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4280 handle=7e212280
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4300 handle=7e212300
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4380 handle=7e212380
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4400 handle=7e212400
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4480 handle=7e212480
    > uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4500 handle=7e212500
    > Root-hub state: reset FSBR: 0
    > HC status
    > usbcmd = 0000 Maxp32
    > usbstat = 0020 HCHalted
    > usbint = 0000
    > usbfrnum = (0)000
    > flbaseadd = 7ffd5000
    > sof = 40
    > stat1 = 0080
    > stat2 = 0080
    > Most recent frame: 0 (0) Last ISO frame: 0 (0)
    > Periodic load table
    > 0 0 0 0 0 0 0 0
    > 0 0 0 0 0 0 0 0
    > 0 0 0 0 0 0 0 0
    > 0 0 0 0 0 0 0 0
    > Total: 0, #INT: 0, #ISO: 0
    > Frame List
    > Skeleton QHs
    > - skel_unlink_qh
    > [ffff88002e5f4000] Skel QH link (00000001) element (00000001)
    > queue is empty
    > - skel_iso_qh
    > [ffff88002e5f4080] Skel QH link (00000001) element (00000001)
    > queue is empty
    > - skel_int128_qh
    > [ffff88002e5f4100] Skel QH link (7e212482) element (00000001)
    > queue is empty
    > - skel_int64_qh
    > [ffff88002e5f4180] Skel QH link (7e212482) element (00000001)
    > queue is empty
    > - skel_int32_qh
    > [ffff88002e5f4200] Skel QH link (7e212482) element (00000001)
    > queue is empty
    > - skel_int16_qh
    > [ffff88002e5f4280] Skel QH link (7e212482) element (00000001)
    > queue is empty
    > - skel_int8_qh
    > [ffff88002e5f4300] Skel QH link (7e212482) element (00000001)
    > queue is empty
    > - skel_int4_qh
    > [ffff88002e5f4380] Skel QH link (7e212482) element (00000001)
    > queue is empty
    > - skel_int2_qh
    > [ffff88002e5f4400] Skel QH link (7e212482) element (00000001)
    > queue is empty
    > - skel_async_qh
    > [ffff88002e5f4480] Skel QH link (00000001) element (7e215000)
    > queue is empty
    > [ffff88002e5f3000] link (00000001) e0 Length=0 MaxLen=7ff DT0 EndPt=0 Dev=7f, PID=69(IN) (buf=00000000)
    > - skel_term_qh
    > [ffff88002e5f4500] Skel QH link (7e212502) element (7e215000)
    > queue is empty

    Yes, that looks normal for a controller with no activity.

    Alan Stern



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