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    SubjectPrerelease kernel will not hotplug a USB host-controller when it is inserted into a Cardbus slot.
    Hi Linus and Co.,

    I am writing to let you know that in all test12-pre6+ kernels,
    I get a "Bad PCI invocation" error when hotplug attempts to
    handle the insertion of a USB host-controller into a Cardbus
    slot.

    I am aware that you most likely will ship 2.4.0 anyway, but
    thought you should at least know about the bug.

    I have tried your latest call_usermodehelper patch, Andrew,
    which appears to have not made it into the kernel, but it
    did not solve the problem.

    What follows is test results from three configurations:

    prerelease with ds.o as a modular driver -- hotplug fails
    prerelease with ds.o in-kernel -- hotplug fails
    test11 with ds.o as a modular driver -- hotplug succeeds
    and usb-ohci loads

    At the end of the message, you'll find the lspci output
    for the BusPort Mobile generated using prerelease.

    2.4.0-prerelease with ds.o built as a modular driver:
    ----------------------------------------------------

    PCI: Enabling device 05:00.0 (0000 -> 0002)
    PCI: Found IRQ 11 for device 05:00.0
    PCI: The same IRQ used for device 00:04.0
    Jan 3 03:22:27 agate kernel: cs: cb_alloc(bus 5): vendor 0x1045, device
    0xc861
    Jan 3 03:22:27 agate kernel: PCI: Enabling device 05:00.0 (0000 -> 0002)
    Jan 3 03:22:27 agate kernel: PCI: Found IRQ 11 for device 05:00.0
    Jan 3 03:22:27 agate kernel: PCI: The same IRQ used for device 00:04.0
    Jan 3 03:22:28 agate /sbin/hotplug: Bad PCI invocation

    2.4.0-prerelease with ds.o built in-kernel:
    ------------------------------------------


    PCI: Enabling device 05:00.0 (0000 -> 0002)
    PCI: Found IRQ 11 for device 05:00.0
    PCI: The same IRQ used for device 00:04.0
    Jan 3 03:55:14 agate kernel: cs: cb_alloc(bus 5): vendor 0x1045, device
    0xc861
    Jan 3 03:55:14 agate kernel: PCI: Enabling device 05:00.0 (0000 -> 0002)
    Jan 3 03:55:14 agate kernel: PCI: Found IRQ 11 for device 05:00.0
    Jan 3 03:55:14 agate kernel: PCI: The same IRQ used for device 00:04.0
    Jan 3 03:55:15 agate /sbin/hotplug: Bad PCI invocation
    Jan 3 03:55:15 agate cardmgr[402]: initializing socket 0
    Jan 3 03:55:15 agate cardmgr[402]: socket 0: Anonymous Memory
    Jan 3 03:55:15 agate cardmgr[402]: executing: 'modprobe sram_mtd'
    Jan 3 03:55:15 agate cardmgr[402]: + modprobe: Can't locate module sram_mtd
    Jan 3 03:55:15 agate cardmgr[402]: modprobe exited with status 255
    Jan 3 03:55:15 agate cardmgr[402]: module
    /lib/modules/2.4.0-test11/pcmcia/sram_mtd.o not available
    Jan 3 03:55:15 agate cardmgr[402]: Common memory region at 0x38e00:
    Generic or SRAM
    Jan 3 03:55:15 agate cardmgr[402]: Common memory region at 0xe00:
    Generic or
    SRAM
    Jan 3 03:55:15 agate cardmgr[402]: executing: 'modprobe memory_cs'
    Jan 3 03:55:15 agate cardmgr[402]: + modprobe: Can't locate module
    memory_cs
    Jan 3 03:55:15 agate cardmgr[402]: modprobe exited with status 255
    Jan 3 03:55:15 agate cardmgr[402]: module
    /lib/modules/2.4.0-test11/pcmcia/memory_cs.o not available
    Jan 3 03:55:16 agate cardmgr[402]: get dev info on socket 0 failed:
    Resource temporarily unavailable

    2.4.0-test11 with ds.o built as a modular driver:
    ------------------------------------------------

    cs: socket c3105000 timed out during reset. Try increasing setup_delay.
    PCI: Enabling device 05:00.0 (0000 -> 0002)
    PCI: Found IRQ 11 for device 05:00.0
    PCI: The same IRQ used for device 00:04.0
    Jan 3 02:39:52 agate kernel: cs: socket c3105000 timed out during
    reset. Try increasing setup_delay.
    PCI: Setting latency timer of device 05:00.0 to 64
    Jan 3 02:39:53 agate kernel: cs: cb_alloc(bus 5): vendor 0x1045, device
    0xc861
    Jan 3 02:39:53 agate kernel: PCI: Enabling device 05:00.0 (0000 -> 0002)
    Jan 3 02:39:53 agate kernel: PCI: Found IRQ 11 for device 05:00.0
    Jan 3 02:39:53 agate kernel: PCI: The same IRQ used for device 00:04.0
    Jan 3 02:39:53 agate kernel: PCI: Setting latency timer of device
    05:00.0 to 64Jan 3 02:39:53 agate kernel: usb-ohci.c: USB OHCI at
    membase 0xc5867000, IRQ 11Jan 3 02:39:53 agate kernel: usb-ohci.c:
    usb-05:00.0, PCI device 1045:c861
    Jan 3 02:39:53 agate kernel: usb.c: new USB bus registered, assigned
    bus number 1
    Jan 3 02:39:53 agate kernel: Product: USB OHCI Root Hub
    Jan 3 02:39:53 agate kernel: SerialNumber: c5867000
    Jan 3 02:39:53 agate kernel: hub.c: USB hub found
    Jan 3 02:39:53 agate kernel: hub.c: 2 ports detected
    Jan 3 02:39:53 agate /sbin/hotplug: arguments (usb) env (TYPE=9/0/0
    ACTION=add
    DEVFS=/proc/bus/usb TERM=dumb DEVICE=/proc/bus/usb/001/001 HOSTTYPE=i386
    PATH=/bin:/sbin:/usr/sbin:/usr/bin HOME=/ SHELL=/bin/bash DEBUG=kernel
    OSTYPE=Linux PRODUCT=0/0/0 SHLVL=1 _=/usr/bin/env)

    Here is what lspci has to say about the BusPort PCI entry when running
    prerelease. I checked the lspci output running under test11 and found
    no discrepancies.

    05:00.0 USB Controller: OPTi Inc. 82C861 (rev 10) (prog-if 10 [OHCI])
    Subsystem: OPTi Inc.: Unknown device c861
    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 A routed to IRQ 11
    Region 0: Memory at 11000000 (32-bit, non-prefetchable)
    [size=4K]

    00:04.1 CardBus bridge: Texas Instruments PCI1131 (rev 01)
    Subsystem: Dell Computer Corporation: Unknown device 007e
    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-
    Latency: 168 set, cache line size 08
    Interrupt: pin B routed to IRQ 11
    Region 0: Memory at 10001000 (32-bit, non-prefetchable)
    [size=4K]
    Bus: primary=00, secondary=05, subordinate=05, sec-latency=176
    Memory window 0: 10c00000-10fff000 (prefetchable)
    Memory window 1: 11000000-113ff000
    I/O window 0: 00001800-000018ff
    I/O window 1: 00001c00-00001cff
    BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset- 16bInt-
    PostWrite+
    16-bit legacy interface ports at 0001

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