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iommu/amd: Return devid as alias for ACPI HID devices 

ACPI HID devices do not actually have an alias for
them in the IVRS. But dev_data->alias is still used
for indexing into the IOMMU device table for devices
being handled by the IOMMU. So for ACPI HID devices,
we simply return the corresponding devid as an alias,
as parsed from IVRS table.

Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Fixes: 2bf9a0a127 ('iommu/amd: Add iommu support for ACPI HID devices')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Arindam Nath 2018-09-18 15:40:58 +05:30 committed by Joerg Roedel
parent be9e6598ae
commit 5ebb1bc2d6
1 changed files with 6 additions and 0 deletions
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6
drivers/iommu/amd_iommu.c
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@ -246,7 +246,13 @@ static u16 get_alias(struct device *dev)
/* The callers make sure that get_device_id() does not fail here */ /* The callers make sure that get_device_id() does not fail here */
devid = get_device_id(dev); devid = get_device_id(dev);
/* For ACPI HID devices, we simply return the devid as such */
if (!dev_is_pci(dev))
return devid;
ivrs_alias = amd_iommu_alias_table[devid]; ivrs_alias = amd_iommu_alias_table[devid];
pci_for_each_dma_alias(pdev, __last_alias, &pci_alias); pci_for_each_dma_alias(pdev, __last_alias, &pci_alias);
if (ivrs_alias == pci_alias) if (ivrs_alias == pci_alias)