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    SubjectRe: 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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