linux-kernel - Re: pci-express hotplug

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Message-ID: <20091012145700.GJ9228@kernel.dk>
Date:	Mon, 12 Oct 2009 16:57:00 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Greg KH <greg@...ah.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	jbarnes@...tuousgeek.org, linux-pci@...r.kernel.org
Subject: Re: pci-express hotplug

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?

-- 
Jens Axboe

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