1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index d9514c46177f..72d68c596703 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3950,7 +3950,11 @@ static void __devinit quirk_calpella_no_shadow_gtt(struct pci_dev *dev)
         if (!(ggc & GGC_MEMORY_VT_ENABLED)) {
                 printk(KERN_INFO "DMAR: BIOS has allocated no shadow GTT; disabling IOMMU for graphics\n");
                 dmar_map_gfx = 0;
-        }
+        } else if (dmar_map_gfx) {
+                /* we have to ensure the gfx device is idle before we flush */
+                printk(KERN_INFO "DMAR: Disabling batched IOTLB flush on Ironlake\n");
+                intel_iommu_strict = 1;
+       }
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0040, quirk_calpella_no_shadow_gtt);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0044, quirk_calpella_no_shadow_gtt);