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 09:11:44 -0700
From:	Greg KH <greg@...ah.com>
To:	"Kevin P. Fleming" <lkml@...leming.us>,
	Jan Beulich <jbeulich@...ell.com>, Alan Cox <alan@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: drivers/pci/probe.c patch in 2.6.20.4 causes 'cannot adjust
	BAR0 (not I/O)' on NVidia MCP51

On Sun, Mar 25, 2007 at 08:23:23AM -0700, 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)
> 
> 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.

Jan, any thoughts about this?

Should this be backed out of the -stable releases?

Kevin, does 2.6.21-rc4 work properly for you?

thanks,

greg k-h
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