linux-kernel - Re: pcibios_scanned needs to be set in ACPI? (was Re: 2.6.25-rc5: Reported regressions from 2.6.24)

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Date:	Wed, 12 Mar 2008 23:24:58 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Greg KH" <greg@...ah.com>
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, "Jeff Garzik" <jeff@...zik.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Adrian Bunk" <bunk@...nel.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Natalie Protasevich" <protasnb@...il.com>,
	"Ingo Molnar" <mingo@...e.hu>, "Len Brown" <len.brown@...el.com>,
	"Guennadi Liakhovetski" <g.liakhovetski@....de>
Subject: Re: pcibios_scanned needs to be set in ACPI? (was Re: 2.6.25-rc5: Reported regressions from 2.6.24)

On Wed, Mar 12, 2008 at 10:44 PM, Greg KH <greg@...ah.com> wrote:
> On Wed, Mar 12, 2008 at 04:09:17PM -0700, Linus Torvalds wrote:
>  >
>  >
>
> > On Wed, 12 Mar 2008, Greg KH wrote:
>  > >
>  > > I can't get a box here to produce both of those PCI: messages myself,
>  > > and neither can Len, so something is really odd here.
>
>  Ok, stupid me, this was my fault.  I was assuming that pci busses would
>  never be registered multiple times with the pci core.  Obviously this
>  isn't true.  The previous patch I proposed was only paying attention to
>  the PCI devices, and that logic is just fine (it's already protected
>  when it is attempted to be registered multiple times.)
>
>  So, the patch below fixes the issue for me, and reboot seems to work as
>  well.
>
>  Guennadi, can you test this out on your machine?
>
>  thanks for your patience,
>
>  greg k-h
>
>
>  From: Greg Kroah-Hartman <gregkh@...e.de>
>  Subject: PCI: fix issue with busses registering multiple times in sysfs
>
>  PCI busses can be registered multiple times, so we need to detect if we
>  have registered our bus structure in sysfs already.  If so, don't do it
>  again.
>
>  Thanks to Guennadi Liakhovetski <g.liakhovetski@....de> for reporting
>  the problem, and to Linus for poking me to get me to believe that it was
>  a real problem.
>
>  Cc: Linus Torvalds <torvalds@...ux-foundation.org>
>  Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

wonder if

http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-x86.git;a=commitdiff;h=fff07473e243989a2739b9d802d63e051ade7188

helps.

YH
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