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    Subject[PATCH 03/67] dma-mapping: take dma_pfn_offset into account in dma_max_pfn
    Date
    This makes sure the generic version can be used with architectures /
    devices that have a DMA offset in the direct mapping.

    Signed-off-by: Christoph Hellwig <hch@lst.de>
    ---
    include/linux/dma-mapping.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
    index 81ed9b2d84dc..d84951865be7 100644
    --- a/include/linux/dma-mapping.h
    +++ b/include/linux/dma-mapping.h
    @@ -692,7 +692,7 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
    #ifndef dma_max_pfn
    static inline unsigned long dma_max_pfn(struct device *dev)
    {
    - return *dev->dma_mask >> PAGE_SHIFT;
    + return (*dev->dma_mask >> PAGE_SHIFT) + dev->dma_pfn_offset;
    }
    #endif

    --
    2.14.2
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