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    SubjectRe: 3.2.11: PCI Express card cannot be re-detected withing cca 60sec timeframe
    On Tue, Apr 17, 2012 at 10:07 AM, Yinghai Lu <> wrote:
    > On Tue, Apr 17, 2012 at 2:34 AM, Martin Mokrejs
    > <> wrote:
    >> Yinghai Lu wrote:
    >>> On Tue, Apr 17, 2012 at 1:46 AM, Yinghai Lu <> wrote:
    >>>> On Tue, Apr 17, 2012 at 12:27 AM, Martin Mokrejs
    >>>> <> wrote:
    >>>>>> can you send out lspci -vvxxxx -s 00:1c.7 after removing USB 3.0 express card?
    >>>>> No, that did not help (tried on 3.4-rc3). First I plugged in the NEC uPD720200 USB3.0 card
    >>>>> and unplugged it (card removal not reported :(), saved the lspci output.
    >>>>> Then I inserted the FireWire card, unplugged, again saved the lspci output.
    >>>>> Finally, saved the dmesg. All three files are attached.
    >>>> for USB 3.0:
    >>>>                SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock-
    >>>>                        Changed: MRL- PresDet- LinkState+
    >>> LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+
    >>> BWMgmt+ ABWMgmt-
    >>> link still active even that card get removed, that looks like chipset
    >>> have problem.
    >> Yinghai,
    >>  so what should I ask Dell for? To fix BIOS of the laptop? What exactly? Or do you think
    >> this is a hardware issue with the chipset?
    > after the expresscard get removed, that root port socket status bits
    > still report Data Link Active, and
    > the card still present.
    > Better check with Dell at first, and ask them to talk with intel if
    > there is silicon bug with that chipset that report wrong status.
    > Let me check if i could rebase one my local patch do reset pcie link
    > to prove that problem it silicon related.

    Rebase patches about pcie link disable/enable in /sys. please check them at


    PCI, sysfs: merge dev and bus cpuaffinity show handling
    PCI, sys: Use is_visable() with boot_vga attribute for pci_dev
    PCI, sysfs: Put resource_alignment info pci_bus_attrs array
    PCI: Move pcie_link_disable to pcie-link.c
    PCI, sysfs: Add pcie attrs for pcie device under pci dev dir.
    PCI: Add link_disable in /sysfs for pcie device

    it is based on for-pci-root-bus-hotplug branch

    Or you can just master branch like
    git clone git://

    After you remove USB3 expresscard, you need to

    echo 1 > /sys/devices/pci0000\:00/0000\:00\:1c.7/pcie_link_disable
    echo 0 > /sys/devices/pci0000\:00/0000\:00\:1c.7/pcie_link_disable


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