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mips/loongson64: implement ->dma_supported instead of ->set_dma_mask 

Same behavior, less code duplication.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2017-05-22 11:50:29 +02:00
parent 447d899b18
commit 69f07be622
1 changed files with 5 additions and 14 deletions
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19
arch/mips/loongson64/common/dma-swiotlb.c
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@ -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)