linux-kernel - Re: drivers/pci/probe.c patch in 2.6.20.4 causes 'cannot adjust BAR0 (not I/O)' on NVidia MCP51

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Date:	Sun, 25 Mar 2007 18:43:28 +0200
From:	Gabriel C <nix.or.die@...glemail.com>
To:	"Kevin P. Fleming" <lkml@...leming.us>
CC:	linux-kernel@...r.kernel.org, Alan Cox <alan@...hat.com>,
	Jan Beulich <jbeulich@...ell.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: drivers/pci/probe.c patch in 2.6.20.4 causes 'cannot adjust BAR0
 (not I/O)' on NVidia MCP51

Kevin P. Fleming wrote:
> I just upgraded from 2.6.20.2 to 2.6.20.4 on my Compaq V6000 laptop,
> which has an NVidia core chipset. It has the MCP51 and uses it for PATA
> and SATA.
>
> Booting the 2.6.20.4 kernel causes two messages (and a kernel lockup)
> like this:
>
> 0000:00:0d.0: cannot adjust BAR0 (not I/O)
> 0000:00:0d.0: cannot adjust BAR1 (not I/O)
>   

BTW I see this too on my laptop ( older PackardBell EasyNote K ) if I 
use P-ATA but I can boot for some reason.


snip

...

[   18.754623] Enabling SiS 96x SMBus.
[   18.754812] 0000:00:02.5: cannot adjust BAR0 (not I/O)
[   18.754816] 0000:00:02.5: cannot adjust BAR1 (not I/O)
[   18.754819] 0000:00:02.5: cannot adjust BAR2 (not I/O)
[   18.754822] 0000:00:02.5: cannot adjust BAR3 (not I/O)

...



> Booting without ACPI, without APIC, without LAPIC makes no usable
> difference (although sometimes I will also receive a message about BAR2).
>
> This patch:
>
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ed8ccee0918ad063a4741c0656fda783e02df627;hp=9e5755bce00bb563739aeb0f09932a1907521167
>
> is the cause... backing it out results in a working 2.6.20.4 kernel on
> my laptop.
>
> I'll be happy to provide any assistance I can debugging this problem.
> Thanks.
>   

Reagrds,

Gabriel

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