From 7a6a3a086fe60bb3b739f66e47dc5bbc8f530d32 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <joerg.roedel@amd.com>
Date: Thu, 2 Jul 2009 12:23:23 +0200
Subject: amd-iommu: handle alias entries correctly in init code

An alias entry in the ACPI table means that the device can send requests to the
IOMMU with both device ids, its own and the alias. This is not handled properly
in the ACPI init code. This patch fixes the issue.

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

diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 10b2acc..ec72c77 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -691,6 +691,7 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu,
 
 			devid = e->devid;
 			devid_to = e->ext >> 8;
+			set_dev_entry_from_acpi(iommu, devid   , e->flags, 0);
 			set_dev_entry_from_acpi(iommu, devid_to, e->flags, 0);
 			amd_iommu_alias_table[devid] = devid_to;
 			break;
@@ -749,11 +750,13 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu,
 
 			devid = e->devid;
 			for (dev_i = devid_start; dev_i <= devid; ++dev_i) {
-				if (alias)
+				if (alias) {
 					amd_iommu_alias_table[dev_i] = devid_to;
-				set_dev_entry_from_acpi(iommu,
-						amd_iommu_alias_table[dev_i],
-						flags, ext_flags);
+					set_dev_entry_from_acpi(iommu,
+						devid_to, flags, ext_flags);
+				}
+				set_dev_entry_from_acpi(iommu, dev_i,
+							flags, ext_flags);
 			}
 			break;
 		default:
-- 
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