Re: [PATCH 09/33] dma-mapping: take dma_pfn_offset into account in dma_max_pfn
From: Robin Murphy <robin.murphy@arm.com>
Date: 2018-01-10 11:08:06
Also in:
linux-alpha, linux-arch, linux-arm-kernel, linux-iommu, linux-m68k, linux-mips, linux-s390, linux-sh, lkml, sparclinux
On 10/01/18 08:00, Christoph Hellwig wrote:
This makes sure the generic version can be used with architectures / devices that have a DMA offset in the direct mapping.
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
quoted hunk ↗ jump to hunk
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