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

Greg KH
2007-03-25T16:12:30Z

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