[Xen-devel] [PATCH 37/44] mips/loongson64: implement ->dma_supported instead of ->set_dma_mask

[Christoph Hellwig <hch@xxxxxx>]

Same behavior, less code duplication.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 arch/mips/loongson64/common/dma-swiotlb.c | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/arch/mips/loongson64/common/dma-swiotlb.c 
b/arch/mips/loongson64/common/dma-swiotlb.c
index 178ca17a5667..34486c138206 100644
--- a/arch/mips/loongson64/common/dma-swiotlb.c
+++ b/arch/mips/loongson64/common/dma-swiotlb.c
@@ -75,19 +75,11 @@ static void loongson_dma_sync_sg_for_device(struct device 
*dev,
        mb();
 }
 
-static int loongson_dma_set_mask(struct device *dev, u64 mask)
+static int loongson_dma_supported(struct device *dev, u64 mask)
 {
-       if (!dev->dma_mask || !dma_supported(dev, mask))
-               return -EIO;
-
-       if (mask > DMA_BIT_MASK(loongson_sysconf.dma_mask_bits)) {
-               *dev->dma_mask = DMA_BIT_MASK(loongson_sysconf.dma_mask_bits);
-               return -EIO;
-       }
-
-       *dev->dma_mask = mask;
-
-       return 0;
+       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)
@@ -126,8 +118,7 @@ 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 = swiotlb_dma_supported,
-       .set_dma_mask = loongson_dma_set_mask
+       .dma_supported = loongson_dma_supported,
 };
 
 void __init plat_swiotlb_setup(void)
-- 
2.11.0


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