* [PATCH] AMD IOMMU: ignore detection of GART IOMMU
@ 2008-07-08 12:47 Joerg Roedel
2008-07-09 8:57 ` Ingo Molnar
0 siblings, 1 reply; 2+ messages in thread
From: Joerg Roedel @ 2008-07-08 12:47 UTC (permalink / raw)
To: mingo, tglx
Cc: linux-kernel, iommu, Joerg Roedel, Robert Richter, Bhavna Sarathy
One of the last IOMMU updates covered a bug in the AMD IOMMU code. The early
detection code does not succeed if the GART is already detected. This patch
fixes this.
Cc: Robert Richter <robert.richter@amd.com>
Cc: Bhavna Sarathy <Bhavna.Sarathy@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kernel/amd_iommu_init.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 2a13e43..bb02800 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -828,7 +828,7 @@ static int __init early_amd_iommu_detect(struct acpi_table_header *table)
void __init amd_iommu_detect(void)
{
- if (swiotlb || no_iommu || iommu_detected)
+ if (swiotlb || no_iommu || (iommu_detected && !gart_iommu_aperture))
return;
if (acpi_table_parse("IVRS", early_amd_iommu_detect) == 0) {
--
1.5.3.7
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2008-07-08 12:47 [PATCH] AMD IOMMU: ignore detection of GART IOMMU Joerg Roedel
2008-07-09 8:57 ` Ingo Molnar
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