[PATCH] powerpc: remove device_to_mask

[Christoph Hellwig <hch@lst.de>]

Use the dma_get_mask helper from dma-mapping.h instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/powerpc/include/asm/iommu.h     | 8 --------
 arch/powerpc/kernel/dma-iommu.c      | 4 ++--
 arch/powerpc/platforms/pseries/vio.c | 4 ++--
 3 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index 0ac52392ed99..f98f2864b66a 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -327,13 +327,5 @@ extern bool iommu_fixed_is_weak;
 
 extern const struct dma_map_ops dma_iommu_ops;
 
-static inline unsigned long device_to_mask(struct device *dev)
-{
-	if (dev->dma_mask && *dev->dma_mask)
-		return *dev->dma_mask;
-	/* Assume devices without mask can take 32 bit addresses */
-	return 0xfffffffful;
-}
-
 #endif /* __KERNEL__ */
 #endif /* _ASM_IOMMU_H */
diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c
index 09231ef06d01..168af3a5b4b1 100644
--- a/arch/powerpc/kernel/dma-iommu.c
+++ b/arch/powerpc/kernel/dma-iommu.c
@@ -71,7 +71,7 @@ static dma_addr_t dma_iommu_map_page(struct device *dev, struct page *page,
 		return dma_direct_map_page(dev, page, offset, size, direction,
 				attrs);
 	return iommu_map_page(dev, get_iommu_table_base(dev), page, offset,
-			      size, device_to_mask(dev), direction, attrs);
+			      size, dma_get_mask(dev), direction, attrs);
 }
 
 
@@ -92,7 +92,7 @@ static int dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
 	if (dma_iommu_map_bypass(dev, attrs))
 		return dma_direct_map_sg(dev, sglist, nelems, direction, attrs);
 	return ppc_iommu_map_sg(dev, get_iommu_table_base(dev), sglist, nelems,
-				device_to_mask(dev), direction, attrs);
+				dma_get_mask(dev), direction, attrs);
 }
 
 static void dma_iommu_unmap_sg(struct device *dev, struct scatterlist *sglist,
diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c
index 141795275ccb..97c0e3e5eae5 100644
--- a/arch/powerpc/platforms/pseries/vio.c
+++ b/arch/powerpc/platforms/pseries/vio.c
@@ -524,7 +524,7 @@ static dma_addr_t vio_dma_iommu_map_page(struct device *dev, struct page *page,
 
 	if (vio_cmo_alloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl))))
 		goto out_fail;
-	ret = iommu_map_page(dev, tbl, page, offset, size, device_to_mask(dev),
+	ret = iommu_map_page(dev, tbl, page, offset, size, dma_get_mask(dev),
 			direction, attrs);
 	if (unlikely(ret == DMA_MAPPING_ERROR))
 		goto out_deallocate;
@@ -564,7 +564,7 @@ static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
 
 	if (vio_cmo_alloc(viodev, alloc_size))
 		goto out_fail;
-	ret = ppc_iommu_map_sg(dev, tbl, sglist, nelems, device_to_mask(dev),
+	ret = ppc_iommu_map_sg(dev, tbl, sglist, nelems, dma_get_mask(dev),
 			direction, attrs);
 	if (unlikely(!ret))
 		goto out_deallocate;
-- 
2.20.1