From: Arindam Nath arindam.nath@amd.com
[ Upstream commit 5ebb1bc2d63d90dd204169e21fd7a0b4bb8c776e ]
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: 2bf9a0a12749 ('iommu/amd: Add iommu support for ACPI HID devices') Signed-off-by: Joerg Roedel jroedel@suse.de Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/iommu/amd_iommu.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 01746e7b90de..ac3bbe03af9a 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -253,7 +253,13 @@ static u16 get_alias(struct device *dev)
/* The callers make sure that get_device_id() does not fail here */ 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]; + pci_for_each_dma_alias(pdev, __last_alias, &pci_alias);
if (ivrs_alias == pci_alias)