linux-kernel - RE: Regression: 2.6.34 boot fails on E5405 system, bisected: de08e2c26

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Message-ID: <43F901BD926A4E43B106BF17856F0755EA8EEA18@orsmsx508.amr.corp.intel.com>
Date:	Wed, 14 Jul 2010 11:19:45 -0700
From:	"Pan, Jacob jun" <jacob.jun.pan@...el.com>
To:	Ben Greear <greearb@...delatech.com>
CC:	Robert Hancock <hancockrwd@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"jbarnes@...tuousgeek.org" <jbarnes@...tuousgeek.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: RE: Regression: 2.6.34 boot fails on E5405 system, bisected:
 	de08e2c26

>-----Original Message-----
>From: Ben Greear [mailto:greearb@...delatech.com]
>Sent: Wednesday, July 14, 2010 10:07 AM
>To: Pan, Jacob jun
>Cc: Robert Hancock; linux-kernel; jbarnes@...tuousgeek.org
>Subject: Re: Regression: 2.6.34 boot fails on E5405 system, bisected:
>de08e2c26
>
>On 07/14/2010 08:36 AM, Pan, Jacob jun wrote:
>> what is the config size of 10.1?
>> ls -l /sys/bus/pci/devices/0000:00:10.1/config
>>
>> if that is 256, it might be related to this patch.
>
>That patch is already in 2.6.34.y (with slight white-space
>change it seems:  space before <).
>
>I just posted a patch to lkml that fixes the problem for me,
>based on a suggestion by Robert Hancock.
>
>I think this or something similar should to go 2.6.34.y stable
>as well.
> 


I have not seen the patch yet, but there is no guarantee that
capabilities are always laid out in ascending address. So I think
we cannot bail out when
	pcie_cap >> 20 <= pos

If that is some bug in the config space, can we fix it with some quirks?

Thanks,

Jacob

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