swiotlb_dma_supported will always return true for the a mask large enough to be covered by wired up physical address, so this function is pointless.
Signed-off-by: Christoph Hellwig <[email protected]> --- arch/mips/loongson64/common/dma-swiotlb.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/arch/mips/loongson64/common/dma-swiotlb.c b/arch/mips/loongson64/common/dma-swiotlb.c index 6a739f8ae110..a5e50f2ec301 100644 --- a/arch/mips/loongson64/common/dma-swiotlb.c +++ b/arch/mips/loongson64/common/dma-swiotlb.c @@ -56,13 +56,6 @@ static void loongson_dma_sync_sg_for_device(struct device *dev, mb(); } -static int loongson_dma_supported(struct device *dev, u64 mask) -{ - if (mask > DMA_BIT_MASK(loongson_sysconf.dma_mask_bits)) - return 0; - return swiotlb_dma_supported(dev, mask); -} - dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) { long nid; @@ -99,7 +92,7 @@ static const struct dma_map_ops loongson_dma_map_ops = { .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, .sync_sg_for_device = loongson_dma_sync_sg_for_device, .mapping_error = swiotlb_dma_mapping_error, - .dma_supported = loongson_dma_supported, + .dma_supported = swiotlb_dma_supported, }; void __init plat_swiotlb_setup(void) -- 2.17.0 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
