linux-kernel - Re: [Bug #15124] PCI host bridge windows ignored (works with pci=use

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Message-ID: <20100128121216.717ca66a@jbarnes-piketon>
Date:	Thu, 28 Jan 2010 12:12:16 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jeff Garrett <jeff@...rrett.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Linux PCI <linux-pci@...r.kernel.org>,
	Myron Stowe <myron.stowe@...com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [Bug #15124] PCI host bridge windows ignored (works with
 pci=use_crs)

On Thu, 28 Jan 2010 10:13:26 -0800
Yinghai Lu <yinghai@...nel.org> wrote:

> On 01/28/2010 08:24 AM, Jesse Barnes wrote:
> > On Wed, 27 Jan 2010 22:02:26 -0600
> > jeff@...rrett.org (Jeff Garrett) wrote:
> > 
> >> On Wed, Jan 27, 2010 at 07:24:09PM -0800, Jesse Barnes wrote:
> >>> On Wed, 27 Jan 2010 17:50:17 -0800 (PST)
> >>> Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> >>>> On Tue, 26 Jan 2010, Yinghai Lu wrote:
> >>>>>
> >>>>> [PATCH] x86/pci: don't use ioh resource if only have one ioh
> >>>>
> >>>> Please, no.
> >>>>
> >>>> This patch is too ugly to live.
> >>>>
> >>>> And it's totally unacceptable to probe every single possible PCI
> >>>> device for something like this.
> >>>>
> >>>> If we don't know enough about the hardware workings of those
> >>>> Intel bridges to know when they are active and how they decode
> >>>> things, then please let's just disable intel_bus.c entirely.
> >>>>
> >>>> There's no excuse for hacky tests like this.
> >>>
> >>> Ok, we'll just kill it entirely then.  I'll send a patch tomorrow
> >>> unless Yinghai beats me to it.
> >>
> >> What about something like this (works for me, without pci=use_crs)?
> >>
> >> ---
> >>     Remove intel_bus.c Intel-specific PCI/IOH logic
> >>     
> >>     Signed-off-by: Jeff Garrett <jeff@...rrett.org>
> > 
> > Yeah, looks good.  I'll push to Linus today.
> > 
> 
> please don't. will send you another patch, to keep the print out so
> we can cross check the _CRS.

I don't think there's much point due to the points we discussed
earlier, I'd rather just get rid of it.

-- 
Jesse Barnes, Intel Open Source Technology Center
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