intel-iommu: No mapping for non-PCI devices
This should fix kernel.org bug #11821, where the dcdbas driver makes up a platform device and then uses dma_alloc_coherent() on it, in an attempt to get memory < 4GiB. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -2457,10 +2457,15 @@ static int iommu_should_identity_map(struct pci_dev *pdev)
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}
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/* Check if the pdev needs to go through non-identity map and unmap process.*/
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static int iommu_no_mapping(struct pci_dev *pdev)
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static int iommu_no_mapping(struct device *dev)
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{
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struct pci_dev *pdev;
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int found;
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if (unlikely(dev->bus != &pci_bus_type))
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return 1;
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pdev = to_pci_dev(dev);
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if (iommu_dummy(pdev))
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return 1;
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@ -2516,7 +2521,7 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
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BUG_ON(dir == DMA_NONE);
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if (iommu_no_mapping(pdev))
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if (iommu_no_mapping(hwdev))
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return paddr;
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domain = get_valid_domain_for_dev(pdev);
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@ -2656,7 +2661,7 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr,
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struct iova *iova;
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struct intel_iommu *iommu;
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if (iommu_no_mapping(pdev))
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if (iommu_no_mapping(dev))
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return;
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domain = find_domain(pdev);
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@ -2747,7 +2752,7 @@ static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
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struct iova *iova;
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struct intel_iommu *iommu;
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if (iommu_no_mapping(pdev))
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if (iommu_no_mapping(hwdev))
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return;
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domain = find_domain(pdev);
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@ -2806,7 +2811,7 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne
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struct intel_iommu *iommu;
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BUG_ON(dir == DMA_NONE);
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if (iommu_no_mapping(pdev))
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if (iommu_no_mapping(hwdev))
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return intel_nontranslate_map_sg(hwdev, sglist, nelems, dir);
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domain = get_valid_domain_for_dev(pdev);
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