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    SubjectRe: [PATCH] PCI legacy resource fix
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    On Wed, 2006-12-06 at 13:41 +0000, Ralf Baechle wrote:
    > Since commit 368c73d4f689dae0807d0a2aa74c61fd2b9b075f the kernel will try
    > to update the non-writeable BAR registers 0..3 of PIIX4 IDE adapters if
    > pci_assign_unassigned_resources() is used to do full resource assignment
    > of the bus. This fails because in the PIIX4 these BAR registers have
    > implicitly assumed values and read back as zero; it used to work because
    > the kernel used to just write zero to that register the read back value
    > did match what was written.
    >
    > The fix is a new resource flag IORESOURCE_PCI_FIXED used to mark a
    > resource as non-movable. This will also be useful to keep other import
    > system resources from being moved around - for example system consoles
    > on PCI busses.

    I have a problem where an ich6 (SATA+PATA) is getting its port0 reserved
    by the pci quirk for libata so that it gets picked up by ata_piix. In
    current git, ata_piix complains:

    [ 124.507570] PCI: Unable to reserve I/O region #1:8@1f0 for device 0000:00:1f.2

    I bisected to the same commit, 368c73d4f689dae0807d0a2aa74c61fd2b9b075f,
    however, your patch doesn't fix my problem.
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