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    SubjectRe: PROBLEM: ARM-dma-mapping-fix-for-speculative-prefetching cause OOPS
    On Fri, Jul 01, 2011 at 12:54:09PM +0800, Qin Dehua wrote:
    > The followings are messages of the three tests:
    > ====== RUN 1 ======
    > kernel BUG at drivers/md/raid5.c:3978!

    So they are BUG_ON()s after all...

    Could you try commenting out:

    + if (dir != DMA_TO_DEVICE)
    + outer_inv_range(paddr, paddr + size);

    in ___dma_page_dev_to_cpu and:

    + if (dir != DMA_TO_DEVICE) {
    + unsigned long paddr = __pa(kaddr);
    + outer_inv_range(paddr, paddr + size);
    + }

    in ___dma_single_dev_to_cpu please - and put a BUG_ON(dir == DMA_BIDIRECTIONAL)
    in their place (because that won't be handled correctly with that change.)

    Thanks.

    --
    Russell King
    Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
    maintainer of:


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