From: Christoph Hellwig Date: Thu, 30 Nov 2017 15:32:51 +0000 (-0800) Subject: dma-mapping: take dma_pfn_offset into account in dma_max_pfn X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a41ef1e455a9796be8cb986f0616f52453ac8e4b;p=linux.git dma-mapping: take dma_pfn_offset into account in dma_max_pfn 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 Reviewed-by: Robin Murphy --- diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 81ed9b2d84dcc..d84951865be72 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