Blame linux-2.6-cantiga-iommu-gfx.patch
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diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
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index 4173125..baa32a0 100644
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--- a/drivers/pci/intel-iommu.c
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+++ b/drivers/pci/intel-iommu.c
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@@ -340,7 +340,7 @@ int dmar_disabled = 0;
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int dmar_disabled = 1;
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#endif /*CONFIG_DMAR_DEFAULT_ON*/
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-static int __initdata dmar_map_gfx = 1;
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+static int dmar_map_gfx = 1;
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static int dmar_forcedac;
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static int intel_iommu_strict;
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@@ -3728,6 +3728,12 @@ static void __devinit quirk_iommu_rwbf(struct pci_dev *dev)
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*/
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printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n");
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rwbf_quirk = 1;
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+
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+ /* https://bugzilla.redhat.com/show_bug.cgi?id=538163 */
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+ if (dev->revision == 0x07) {
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+ printk(KERN_INFO "DMAR: Disabling IOMMU for graphics on this chipset\n");
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+ dmar_map_gfx = 0;
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+ }
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf);
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