[PATCH 1/3] arm64: Make default dma_ops to be noncoherent

Catalin Marinas catalin.marinas at arm.com
Fri Apr 25 10:34:12 PDT 2014

From: Ritesh Harjani <ritesh.harjani at gmail.com>

Currently arm64 dma_ops is by default made coherent which makes it
opposite in default policy from arm.

Make default dma_ops to be noncoherent (same as arm), as currently there
aren't any dma-capable drivers which assumes coherent ops

Signed-off-by: Ritesh Harjani <ritesh.harjani at gmail.com>
Acked-by: Will Deacon <will.deacon at arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas at arm.com>
 arch/arm64/mm/dma-mapping.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 0ba347e59f06..1f65963a9c04 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -311,7 +311,7 @@ static int __init swiotlb_late_init(void)
 	size_t swiotlb_size = min(SZ_64M, MAX_ORDER_NR_PAGES << PAGE_SHIFT);
-	dma_ops = &coherent_swiotlb_dma_ops;
+	dma_ops = &noncoherent_swiotlb_dma_ops;
 	return swiotlb_late_init_with_default_size(swiotlb_size);

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