linux-kernel - Re: Regression with commit f9cde5f in 2.6.30-gitX

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Message-ID: <20090624151634.GC15037@elte.hu>
Date:	Wed, 24 Jun 2009 17:16:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	Jaswinder Singh Rajput <jaswinder@...nel.org>,
	Gary Hade <garyhade@...ibm.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	LKML <linux-kernel@...r.kernel.org>,
	x86 maintainers <x86@...nel.org>, Len Brown <lenb@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: Regression with commit f9cde5f in 2.6.30-gitX


* Larry Finger <Larry.Finger@...inger.net> wrote:

> Jaswinder Singh Rajput wrote:
> > On Tue, 2009-06-23 at 20:33 -0500, Larry Finger wrote:
> >> My latest pull from Linus's tree fails to boot. Bisection leads to the
> >> commit entitled "x86/ACPI: Correct maximum allowed _CRS returned
> >> resources and warn if exceeded" with hash
> >> f9cde5ffed17bf74f6bef042d99edb0622f58576. I have been unable to
> >> capture the first error message as it scrolls off the screen, but the
> >> second hits the WARN_ON at drivers/ata/ahci.c:695 in routine
> >> ahci_enable_ahci() because HOST_AHCI_EN is not set.
> >>
> > 
> > This patch fixes boot failure on my AMD 64 laptop, can you please test
> > this patch:
> > 
> > [PATCH] x86: fix _CRS resources return handling
> > 
> > We need to check for info->res_num and only handle for < PCI_BUS_NUM_RESOURCES
> > 
> > Also set info->bus->resource[info->res_num] for _CRS resources return handling
> > 
> > Fixed boot failure on some machine.
> > 
> > Reported-by: Larry Finger <Larry.Finger@...inger.net>
> > Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
> > ---
> >  arch/x86/pci/acpi.c |   16 ++++++++++------
> >  1 files changed, 10 insertions(+), 6 deletions(-)
> 
> Tested-by: Larry Finger <Larry.Finger@...inger.net>
> 
> Thanks for the patch. With it, my machine boots with the latest
> 2.6.30-gitX.

Please note the comments from Yinghai and Thomas. The fix does 
something weird after injecting unrelated cleanups and the changelog 
does not cover that.

	Ingo
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