iommu/amd: Make sure IOMMU is not considered to translate itself

The IVRS table usually includes the IOMMU device. But the
IOMMU does never translate itself, so make sure the IOMMU
driver knows this.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 8a7f1971d633876f0e4a5b6fea0a9ff0c367a575..68b3305a126acef6982b66977595c233a1dda813 100644 (file)
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1021,6 +1021,13 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
        ret = init_iommu_from_acpi(iommu, h);
        if (ret)
                return ret;
+
+       /*
+        * Make sure IOMMU is not considered to translate itself. The IVRS
+        * table tells us so, but this is a lie!
+        */
+       amd_iommu_rlookup_table[iommu->devid] = NULL;
+
        init_iommu_devices(iommu);
 
        return 0;