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    SubjectRe: [PATCH 1/4] pci/x86: don't assume pref memio are 64bit -v4
    On Thu, Apr 23, 2009 at 08:48:32PM -0700, Yinghai Lu wrote:
    > we should not assign 64bit range to pci device that only take 32bit pref
    > try to set IORESOURCE_MEM_64 in 64bit resource of pci_device/pci_bridge
    > and make the bus resource only have that bit set when all device under that do support
    > 64bit pref mem then use that flag to allocate resource in wanted area
    > v2: fix b_res->flags and logic and passing result.
    > v3: split iomem to iomem32, iomem64, and iomem64 will take IORESOURCE_MEM_64
    > V4: according to Ivan
    > make it support x86 only, by PCIBIOS_MAX_MEM_32
    > double check if the bridge does support pref mem64 with write/read UPPER32

    Thanks, Yinghai.

    > [Impact: do assign wrong range to device that doesn't support it]
    > Reported-by: Yannick <>
    > Signed-off-by: Yinghai Lu <>

    Reviewed-by: Ivan Kokshaysky <>


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