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    SubjectRe: [PATCH 05/39] ARM: ux500: Stop passing MMC's platform data for Device Tree boots
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    On Wed, May 15, 2013 at 11:51 AM, Lee Jones <lee.jones@linaro.org> wrote:

    > It was required to pass DMA channel configuration information to the
    > MMC driver before the new DMA API was in place. Now that it is, and
    > is fully compatible with Device Tree we can stop doing that.
    >
    > Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
    > Signed-off-by: Lee Jones <lee.jones@linaro.org>

    So since the use of dma_request_slave_channel() is not upstream,
    I guess this will break DMA use (i.e slow down transfers!) on all
    device tree boots?

    I'd be happy to apply it once the MMCI patch is in linux-next
    indicating there may just be a window in the merge period
    where it falls back to IRQ mode, but I don't want to disable
    DMA on DT boots for an entire kernel cycle just like that.

    Not applied as of yet.

    Yours,
    Linus Walleij


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