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

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Date:	Wed, 24 Jun 2009 09:21:58 -0500
From:	Larry Finger <Larry.Finger@...inger.net>
To:	Jaswinder Singh Rajput <jaswinder@...nel.org>
CC:	Gary Hade <garyhade@...ibm.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	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

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.

For the record, the printout from the patch results in the following:

PCI: Failed to allocate 0xd0000-0xd3fff from PCI mem for PCI Bus 0000:00
PCI: Failed to allocate 0xec000-0xeffff from PCI mem for PCI Bus
0000:00 due to _CRS returning more than 13 resource descriptors
PCI: Failed to allocate 0xf0000-0xfffff from PCI mem for PCI Bus
0000:00 due to _CRS returning more than 13 resource descriptors
PCI: Failed to allocate 0xc0000000-0xfebfffff from PCI mem for PCI Bus
0000:00 due to _CRS returning more than 13 resource descriptors

Larry
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