iommu/vt-d: Only insert alias dev_info if there is an alias
For devices without an PCI alias there will be two device_domain_info structures added. Prevent that by checking if the alias is different from the device. Signed-off-by: Joerg Roedel <jroedel@suse.de>
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@ -2319,8 +2319,8 @@ static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw)
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struct device_domain_info *info = NULL;
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struct dmar_domain *domain, *tmp;
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struct intel_iommu *iommu;
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u16 req_id, dma_alias;
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unsigned long flags;
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u16 dma_alias;
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u8 bus, devfn;
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domain = find_domain(dev);
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@ -2331,6 +2331,8 @@ static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw)
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if (!iommu)
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return NULL;
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req_id = ((u16)bus << 8) | devfn;
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if (dev_is_pci(dev)) {
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struct pci_dev *pdev = to_pci_dev(dev);
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@ -2361,7 +2363,7 @@ static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw)
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}
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/* register PCI DMA alias device */
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if (dev_is_pci(dev)) {
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if (req_id != dma_alias && dev_is_pci(dev)) {
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tmp = dmar_insert_one_dev_info(iommu, PCI_BUS_NUM(dma_alias),
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dma_alias & 0xff, NULL, domain);
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