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    SubjectRe: test12-pre6
    On Wed, Dec 06, 2000 at 10:38:51AM -0800, Linus Torvalds wrote:
    > On Wed, 6 Dec 2000, Erik Mouw wrote:
    > > So at first the PCI code can't allocate an IRQ for devices 00:00.1
    > > (audio), 00:07.2 (USB), and 00:09.0 (winmodem), but after the audio and
    > > USB modules get inserted, IRQ 5 and 11 get allocated.
    >
    > No, the irq stuff is a two-stage process: at first it only _reads_ the irq
    > config stuff for every device - whether they have a driver or not - and at
    > this stage it will not ever actually allocate and set up a new route. It
    > will just see if a route has already been set up by the BIOS.
    >
    > Then, when a driver actually does a pci_enable_device(), it will do the
    > second stage of PCI irq routing, which is to actually set up a route if
    > none originally existed. So this is why you first se "failed" messages
    > (the generic "test if there is a route" code) and then later when loading
    > the module you see "allocated irq XX" messages.

    Thanks for explaining.

    > So your dmesg output looks fine, and everything is ok at that level. The
    > fact that something still doesn't work for you indicates that we still
    > have problems, of course.
    >
    > Can you tell me what device it is that doesn't work for you?

    The USB controller. That's device 00:07.2:

    00:07.2 USB Controller: Intel Corporation 82440MX USB Universal Host Controller (prog-if 00 [UHCI])
    Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
    Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Interrupt: pin D routed to IRQ 11
    Region 4: I/O ports at fcc0 [size=32]

    I never tried the Winmodem, because I don't need a modem. It came free
    with the laptop.


    Erik

    --
    J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
    of Electrical Engineering, Faculty of Information Technology and Systems,
    Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands
    Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl
    WWW: http://www-ict.its.tudelft.nl/~erik/
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