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    SubjectRe: [PATCH 0/16] DMA-API debugging facility v2
    On Fri, Jan 09, 2009 at 11:33:27PM +0100, Joerg Roedel wrote:
    > > This was triggered during pci_unmap_page() -> dma_unmap_single() where
    > > check_unmap() did not find the entry.
    > >
    > > The original mapping was done in bnx2 using pci_map_page(). I did not
    > > see how the debug entry was added to the hash during the call to
    > > pci_map_page() -> dma_map_page(). Did I miss something?
    >
    > dma_map_page() results in dma_map_single() -> debug_map_single() call on
    > x86. This way the entry would be added. Maybe the error from a double
    > free?

    Ah, it only calls ops->map_single. Thanks for pointing that out. I will
    add a call to debug_map_single to dma_map_page too. So the error above
    may be a false positive.

    Joerg


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