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

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Message-ID: <4B61D3C6.1050104@kernel.org>
Date:	Thu, 28 Jan 2010 10:13:26 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Jesse Barnes <jbarnes@...tuousgeek.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 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.

YH
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