| Message ID | 20180110080027.13879-10-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
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> > 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 > >
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
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(-)