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    SubjectRe: [PATCH] fix IDE legacy mode resource
    Hello Jeff,

    Do you have any comments?

    On Sun, 29 Jul 2007 17:15:44 +0900
    Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> wrote:

    > On Sat, 28 Jul 2007 14:13:06 -0400
    > Jeff Garzik <jeff@garzik.org> wrote:
    >
    > > Yoichi Yuasa wrote:
    > > > Hi,
    > > >
    > > > I got the following error on MIPS Cobalt.
    > > > MIPS Cobalt has the 0x10000000 offset between resource and bus region.
    > > >
    > > > PCI: Unable to reserve I/O region #1:8@f00001f0 for device 0000:00:09.1
    > > > pata_via 0000:00:09.1: failed to request/iomap BARs for port 0 (errno=-16)
    > > > PCI: Unable to reserve I/O region #3:8@f0000170 for device 0000:00:09.1
    > > > pata_via 0000:00:09.1: failed to request/iomap BARs for port 1 (errno=-16)
    > > > pata_via 0000:00:09.1: no available native port
    > > >
    > > > At this point, these resources should be the bus regions.
    > > >
    > > > Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
    > >
    > > I'm not sure I understand what's going on here... could you or someone
    > > provide additional explanation as to why this is a fix?
    >
    > The legacy mode IDE resources set the following order.
    >
    > pci_setup_device()
    > Legacy mode ATA controllers have fixed addresses.
    > IDE resources: 0x1F0-0x1F7, 0x3F6, 0x170-0x177, 0x376
    > |
    > V
    > pcibios_fixup_bus()
    > MIPS Cobalt PCI bus have the -0x10000000 offset from PCI resources.
    > pcibios_fixup_bus() fix PCI bus regions.
    > 0x1F0 - 0x10000000 = 0xF00001F0
    > |
    > V
    > ata_pci_init_one()
    > PCI: Unable to reserve I/O region #1:8@f00001f0 for device 0000:00:09.1
    >
    > In some architectures, PCI bus have the offset from PCI resource.
    > They are adjusted by pcibios_fixup_bus().
    >
    > For this reason, pci_setup_device() should set PCI bus regions.
    -
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