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amd-iommu: handle alias entries correctly in init code

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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>
This commit is contained in:
Joerg Roedel 2009-07-02 12:23:23 +02:00
parent 6a047d8b9e
commit 7a6a3a086f
1 changed files with 7 additions and 4 deletions
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11
arch/x86/kernel/amd_iommu_init.c
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@ -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: