forked from Minki/linux
intel-iommu: Fix device-to-iommu mapping for PCI-PCI bridges.
When the DMAR table identifies that a PCI-PCI bridge belongs to a given IOMMU, that means that the bridge and all devices behind it should be associated with the IOMMU. Not just the bridge itself. This fixes the device_to_iommu() function accordingly. (It's broken if you have the same PCI bus numbers in multiple domains, but this function was always broken in that way; I'll be dealing with that later). Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -477,11 +477,16 @@ static struct intel_iommu *device_to_iommu(u8 bus, u8 devfn)
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if (drhd->ignored)
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continue;
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for (i = 0; i < drhd->devices_cnt; i++)
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for (i = 0; i < drhd->devices_cnt; i++) {
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if (drhd->devices[i] &&
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drhd->devices[i]->bus->number == bus &&
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drhd->devices[i]->devfn == devfn)
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return drhd->iommu;
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if (drhd->devices[i]->subordinate &&
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drhd->devices[i]->subordinate->number <= bus &&
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drhd->devices[i]->subordinate->subordinate >= bus)
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return drhd->iommu;
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}
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if (drhd->include_all)
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return drhd->iommu;
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