linux-kernel - Re: post 2.6.26 requires pciehp_slot_with

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Message-Id: <200807241407.18543.jbarnes@virtuousgeek.org>
Date:	Thu, 24 Jul 2008 14:07:18 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Pierre Ossman <drzeus-list@...eus.cx>
Cc:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-pci@...r.kernel.org
Subject: Re: post 2.6.26 requires pciehp_slot_with_bus

On Thursday, July 24, 2008 1:39 pm Pierre Ossman wrote:
> On Thu, 24 Jul 2008 21:38:32 +0900
>
> Kenji Kaneshige <kaneshige.kenji@...fujitsu.com> wrote:
> > Hi Pierre,
> > (Added linux-pci to CC)
> >
> > Pierre Ossman wrote:
> > > Somewhere post 2.6.26, pciehp started whining about not being able to
> > > claim the slot and error code -17. It suggested adding
> > > "pciehp_slot_with_bus", which actually helped. Still, having a kernel
> > > parameter should just be a temporary fix.
> >
> > The "pciehp_slot_with_bus" option is a workaround for the platforms
> > that assign the same physical slot number to multiple slots. If your
> > system has PCI chassis and it supports Chassis Number registers,
> > maybe one of the solution is using chassis number + slot number as a
> > slot name. But I don't have any idea other than "pciehp_slot_with_bus"
> > if your system doesn't support chassis number.
>
> The what now? :)
>
> This is a laptop with a single expressport that worked fine up until
> this merge window. What changed and why is it no longer possible to
> support this hardware without a kernel parameter?

Yeah we're being a bit more careful about registering hotplug slots these 
days.  The fact that you got a conflict message indicates that more than one 
driver is trying to bind to that PCIe port and handle hotplug for it.  I 
guess acpiphp must already be loaded?

Jesse
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