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

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Date:	Wed, 18 Apr 2012 22:29:47 +0200
From:	Martin Mokrejs <mmokrejs@...d.natur.cuni.cz>
To:	Yinghai Lu <yinghai@...nel.org>
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

Yinghai Lu wrote:
> 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.

Why doesn't this happen with the FireWire express card?

> 
> 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.

Martin 

View attachment ".config" of type "text/plain" (85322 bytes)