Commit a41ef1e4 authored Nov 30, 2017 by Christoph Hellwig

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 <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>

parent 8fbc02ac

include/linux/dma-mapping.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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