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- add patch from fedora
This commit is contained in:
Stephan Raue 2010-05-25 22:27:39 +02:00
parent f4d3208dde
commit 320b6f72a9
1 changed files with 26 additions and 0 deletions
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26
packages/linux/patches/036-linux-2.6-cantiga-iommu-gfx.diff Normal file
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@ -0,0 +1,26 @@
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 4173125..baa32a0 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -340,7 +340,7 @@ int dmar_disabled = 0;
int dmar_disabled = 1;
#endif /*CONFIG_DMAR_DEFAULT_ON*/
-static int __initdata dmar_map_gfx = 1;
+static int dmar_map_gfx = 1;
static int dmar_forcedac;
static int intel_iommu_strict;
@@ -3728,6 +3728,12 @@ static void __devinit quirk_iommu_rwbf(struct pci_dev *dev)
*/
printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n");
rwbf_quirk = 1;
+
+ /* https://bugzilla.redhat.com/show_bug.cgi?id=538163 */
+ if (dev->revision == 0x07) {
+ printk(KERN_INFO "DMAR: Disabling IOMMU for graphics on this chipset\n");
+ dmar_map_gfx = 0;
+ }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf);