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

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Message-ID: <4F8F4655.9000004@fold.natur.cuni.cz>
Date:	Thu, 19 Apr 2012 00:55:17 +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 1:29 PM, Martin Mokrejs
> <mmokrejs@...d.natur.cuni.cz> wrote:
>> 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?
> 
> 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

The express card slot seems "dead", nothing happens when I plugin the card.
I have attached the lspci of the bridge (when card p[lugged in), in case there is
something of interest to you. ;-) Same for dmesg.



# grep HOTPLUG /usr/src/linux-3.4-rc3__patches_yinghai_jeff_garzik/.config
CONFIG_HOTPLUG=y
# CONFIG_MEMORY_HOTPLUG is not set
CONFIG_HOTPLUG_CPU=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ACPI_HOTPLUG_CPU=y
# CONFIG_HOTPLUG_PCI_PCIE is not set
CONFIG_HOTPLUG_PCI=y
# CONFIG_HOTPLUG_PCI_FAKE is not set
CONFIG_HOTPLUG_PCI_ACPI=y
# CONFIG_HOTPLUG_PCI_ACPI_IBM is not set
# CONFIG_HOTPLUG_PCI_CPCI is not set
CONFIG_HOTPLUG_PCI_SHPC=m
#


The echo commands just do:

[  616.477711] pcieport 0000:00:1c.7: pcie_link_disable_set: lnk_ctrl = 53
[  637.242990] pcieport 0000:00:1c.7: pcie_link_disable_set: lnk_ctrl = 43
[  641.791748] pcieport 0000:00:1c.7: pcie_link_disable_set: lnk_ctrl = 52
[  654.317009] pcieport 0000:00:1c.7: pcie_link_disable_set: lnk_ctrl = 42
[  664.238154] pcieport 0000:00:1c.7: pcie_link_disable_set: lnk_ctrl = 52
[  686.101576] pcieport 0000:00:1c.7: pcie_link_disable_set: lnk_ctrl = 43

Martin


View attachment "lspci-3.4-rc3-disabled-CONFIG_HOTPLUG_PCI_PCIE" of type "text/plain" (16465 bytes)

View attachment "dmesg-3.4-rc3-disabled-CONFIG_HOTPLUG_PCI_PCIE" of type "text/plain" (60880 bytes)