x86: remove arch specific dma_supported implementation
And instead wire it up as method for all the dma_map_ops instances. Note that this also means the arch specific check will be fully instead of partially applied in the AMD iommu driver. Signed-off-by: Christoph Hellwig <hch@lst.de>
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@@ -213,10 +213,8 @@ static __init int iommu_setup(char *p)
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}
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early_param("iommu", iommu_setup);
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int dma_supported(struct device *dev, u64 mask)
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int x86_dma_supported(struct device *dev, u64 mask)
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{
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const struct dma_map_ops *ops = get_dma_ops(dev);
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#ifdef CONFIG_PCI
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if (mask > 0xffffffff && forbid_dac > 0) {
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dev_info(dev, "PCI: Disallowing DAC for device\n");
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@@ -224,9 +222,6 @@ int dma_supported(struct device *dev, u64 mask)
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}
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#endif
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if (ops->dma_supported)
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return ops->dma_supported(dev, mask);
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/* Copied from i386. Doesn't make much sense, because it will
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only work for pci_alloc_coherent.
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The caller just has to use GFP_DMA in this case. */
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@@ -252,7 +247,6 @@ int dma_supported(struct device *dev, u64 mask)
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return 1;
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}
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EXPORT_SYMBOL(dma_supported);
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static int __init pci_iommu_init(void)
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{
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