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    SubjectRe: is_device_dma_capable
    Hi Fujita,

    2009/6/16 FUJITA Tomonori <>:
    > You use X86_32, right?

    I have CONFIG_X86_32=y in my config file.

    > In 2.6.25, X86_32 and X86_64 had the own dma_alloc_coherent
    > implementations; X86_32 accepted a device having dma_mask that is not
    > initialized however X86_64 didn't, I think.
    > When we merged them, we chose to prohibit a device having dma_mask
    > that is not initialized. I'm not sure the DMA docs say this but IMO
    > it's good to require drivers to set up dma_mask (and
    > coherent_dma_mask) properly if the drivers want DMA.

    If you could point me in the direction of how to set these values
    correctly, I would appreciate it.


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