Messages in this thread Patch in this message | | | From | Christoph Hellwig <> | Subject | [PATCH 1/3] dma-mapping: take dma_pfn_offset into account in dma_max_pfn | Date | Mon, 4 Dec 2017 08:35:59 -0800 |
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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 e8f8e8fb244d..86beb9861618 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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