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    SubjectRe: 3.2.11: PCI Express card cannot be re-detected withing cca 60sec timeframe
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    On Wed, Apr 18, 2012 at 1:29 PM, Martin Mokrejs
    <mmokrejs@fold.natur.cuni.cz> wrote:
    > Yinghai Lu wrote:
    >> On Wed, Apr 18, 2012 at 10:53 AM, Martin Mokrejs
    >> <mmokrejs@fold.natur.cuni.cz> wrote:
    >>>> After you remove USB3 expresscard, you need to
    >>>>
    >>>> echo 1 > /sys/devices/pci0000\:00/0000\:00\:1c.7/pcie_link_disable
    >>>> then
    >>>> echo 0 > /sys/devices/pci0000\:00/0000\:00\:1c.7/pcie_link_disable
    >>>
    >>> So without these two echo commands the is no improvement/fix.
    >>>
    >>> [  686.701306] pciehp 0000:00:1c.7:pcie04: pcie_isr: intr_loc 8
    >>> [  686.701316] pciehp 0000:00:1c.7:pcie04: Presence/Notify input change
    >>> [  686.701319] pciehp 0000:00:1c.7:pcie04: Card present on Slot(7)
    >>> [  686.701357] pciehp 0000:00:1c.7:pcie04: Surprise Removal
    >>> [  686.701390] pciehp 0000:00:1c.7:pcie04: check_link_active: lnk_status = 7011
    >>> [  686.809763] pciehp 0000:00:1c.7:pcie04: pciehp_check_link_status: lnk_status = 7011
    >> ...
    >>> [  686.833678] hub 6-0:1.0: 2 ports detected
    >>>
    >>> echo 1 > /sys/devices/pci0000\:00/0000\:00\:1c.7/pcie_link_disable
    >>>
    >>> [  716.999938] pcieport 0000:00:1c.7: pcie_link_disable_set: lnk_ctrl = 53
    >>> [  717.024647] pciehp 0000:00:1c.7:pcie04: pcie_isr: intr_loc 8
    >>> [  717.024657] pciehp 0000:00:1c.7:pcie04: Presence/Notify input change
    >>> [  717.024665] pciehp 0000:00:1c.7:pcie04: Card not present on Slot(7)
    >>> [  717.024723] pciehp 0000:00:1c.7:pcie04: Surprise Removal
    >>> [  717.024753] pciehp 0000:00:1c.7:pcie04: Disabling domain:bus:device=0000:11:00
    >>> [  717.024756] pciehp 0000:00:1c.7:pcie04: pciehp_unconfigure_device: domain:bus:dev = 0000:11:00
    >> ..
    >>> [  717.045197] pci 0000:11:00.0: freeing pci_dev info
    >>>
    >>> echo 0 > /sys/devices/pci0000\:00/0000\:00\:1c.7/pcie_link_disable
    >>>
    >>> [  748.456914] pcieport 0000:00:1c.7: pcie_link_disable_set: lnk_ctrl = 40
    >>>
    >>
    >> so it is chipset problem, it does not detect and report the presence
    >> of the card after that link is removed.
    >
    > Why doesn't this happen with the FireWire express card?

    sometimes it report correctly. sometime it does not.

    >
    >>
    >> Can you try to use acpiphp instead of pciehp?
    >
    > Umm. I do have acpiphp in my kernel already. I am rather attaching my .config,
    > please me know what you want me to do. My kernel command line could be seen
    > in my previous posts in the dmesg file.

    remove

    CONFIG_HOTPLUG_PCI_PCIE=y
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