linux-kernel - Re: pci-express hotplug

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Date:	Wed, 14 Oct 2009 10:13:09 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Alex Chiang <achiang@...com>
Cc:	Mark Lord <lkml@....ca>, 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

On Tue, Oct 13 2009, Alex Chiang wrote:
> * Jens Axboe <jens.axboe@...cle.com>:
> > > > >> On Mon, Oct 12 2009, Greg KH wrote:
> > > > >>> 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?
> > > 
> > > Can you modprobe acpiphp with debug=1? And send the output?
> > 
> > acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
> > acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:00:05.0
> > acpiphp_glue: found ACPI PCI Hotplug slot 1 at PCI 0000:08:00
> > acpiphp: Slot [1] registered
> > acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:00:07.0
> > acpiphp_glue: found ACPI PCI Hotplug slot 2 at PCI 0000:0b:00
> > acpiphp: Slot [2] registered
> > acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:80:07.0
> > acpiphp_glue: found ACPI PCI Hotplug slot 6 at PCI 0000:84:00
> > acpiphp: Slot [6] registered
> > acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:80:09.0
> > acpiphp_glue: found ACPI PCI Hotplug slot 7 at PCI 0000:87:00
> > acpiphp: Slot [7] registered
> > acpiphp_glue: Bus 0000:87 has 1 slot
> > acpiphp_glue: Bus 0000:84 has 1 slot
> > acpiphp_glue: Bus 0000:0b has 1 slot
> > acpiphp_glue: Bus 0000:08 has 1 slot
> > acpiphp_glue: Total 4 slots
> 
> You mentioned in another mail that you echoed 1 into the various
> slots' power files.
> 
> Did you do that after modprobing acpiphp with debug=1?
> 
> If so, there should be debug output when you try and turn them
> on.

It produces:

acpiphp: enable_slot - physical_slot = 1
acpiphp_glue: acpiphp_enable_slot: Slot status is not ACPI_STA_ALL
acpiphp: enable_slot - physical_slot = 2
acpiphp_glue: acpiphp_enable_slot: Slot status is not ACPI_STA_ALL
acpiphp: enable_slot - physical_slot = 6
acpiphp_glue: acpiphp_enable_slot: Slot status is not ACPI_STA_ALL
acpiphp: enable_slot - physical_slot = 7
acpiphp_glue: acpiphp_enable_slot: Slot status is not ACPI_STA_ALL

I have a card in one of the slots only this time.

> Also, quick dummy check, you are trying to power on populated
> slots, right? :)

Yes :-)

> Can you send the output of lspci -vv? And I like the output of
> lspci -vt as well... Both before and after loading acpiphp
> please.

Send privately.

-- 
Jens Axboe

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