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 <hch@xxxxxx>
---
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
