linux-kernel - Re: pci-express hotplug

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Date:	Mon, 12 Oct 2009 11:00:36 -0400
From:	Mark Lord <lkml@....ca>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Greg KH <greg@...ah.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	jbarnes@...tuousgeek.org, linux-pci@...r.kernel.org
Subject: Re: pci-express hotplug

Jens Axboe wrote:
> On Mon, Oct 12 2009, Greg KH wrote:
>> On Mon, Oct 12, 2009 at 02:06:20PM +0200, Jens Axboe wrote:
>>> Hi,
>>>
>>> I'm trying to get pci-express hotplug working in a box here. I don't
>>> really care about the hotplug aspect, I just want the darn pci-e slots
>>> that are designated hotplug slots to actually WORK. When I load pciehp,
>>> I get:
>>>
>>> Firmware did not grant requested _OSC control
>>> Firmware did not grant requested _OSC control
>>> Firmware did not grant requested _OSC control
>>> Firmware did not grant requested _OSC control
>>> pciehp 0000:00:05.0:pcie04: HPC vendor_id 8086 device_id 340c ss_vid 0 ss_did 0
>>> pciehp 0000:00:05.0:pcie04: service driver pciehp loaded
>>> Firmware did not grant requested _OSC control
>>> pciehp 0000:00:07.0:pcie04: HPC vendor_id 8086 device_id 340e ss_vid 0 ss_did 0
>>> pciehp 0000:00:07.0:pcie04: service driver pciehp loaded
>>> Firmware did not grant requested _OSC control
>>> pciehp 0000:80:07.0:pcie04: HPC vendor_id 8086 device_id 340e ss_vid 0 ss_did 0
>>> pciehp 0000:80:07.0:pcie04: service driver pciehp loaded
>>> pciehp 0000:80:09.0:pcie04: HPC vendor_id 8086 device_id 3410 ss_vid 0 ss_did 0
>>> pciehp 0000:80:09.0:pcie04: service driver pciehp loaded
>>> pciehp: PCI Express Hot Plug Controller Driver version: 0.4
>>>
>>> and the devices in the hotplug slots stay off. Is this an ACPI/bios
>>> issue? How can I debug this?
>> Can you try the acpiphp driver instead?  That's usually the driver you
>> want to use for "modern" systems (i.e. anything made in the past 5
>> years.)
> 
> I should have mentioned that I tried that too. It doesn't complain, but
> I don't see my cards anywhere afterwards. I'm a hotplug newbie, do I
> need to do anything else?
 
Tried this yet:

   options pciehp pciehp_force=1

??
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