linux-kernel - Re: 3.2.11: PCI Express card cannot be re-detected withing cca 60sec timeframe

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Message-ID: <CAE9FiQVcJbPub1O6nwyNsiijHFpHN0jMsGO4MmKugybPL7Wnug@mail.gmail.com>
Date:	Wed, 18 Apr 2012 12:48:18 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Martin Mokrejs <mmokrejs@...d.natur.cuni.cz>
Cc:	linux-pci@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 3.2.11: PCI Express card cannot be re-detected withing cca 60sec timeframe

On Wed, Apr 18, 2012 at 10:53 AM, Martin Mokrejs
<mmokrejs@...d.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.

Can you try to use acpiphp instead of pciehp?

Yinghai
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