1 files changed, 13 insertions, 3 deletions

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 90938c7a74c..b0de5794718 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;
 
@@ -1874,14 +1874,15 @@ static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw)
                         }
                 }
                 if (found) {
+                        spin_unlock_irqrestore(&device_domain_lock, flags);
                         free_devinfo_mem(info);
                         domain_exit(domain);
                         domain = found;
                 } else {
                         list_add(&info->link, &domain->devices);
                         list_add(&info->global, &device_domain_list);
+                        spin_unlock_irqrestore(&device_domain_lock, flags);
                 }
-                spin_unlock_irqrestore(&device_domain_lock, flags);
         }
 
 found_domain:
@@ -3631,7 +3632,8 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
                 pte = dmar_domain->pgd;
                 if (dma_pte_present(pte)) {
                         free_pgtable_page(dmar_domain->pgd);
-                        dmar_domain->pgd = (struct dma_pte *)dma_pte_addr(pte);
+                        dmar_domain->pgd = (struct dma_pte *)
+                                phys_to_virt(dma_pte_addr(pte));
                 }
                 dmar_domain->agaw--;
         }
@@ -3724,6 +3726,8 @@ static int intel_iommu_domain_has_cap(struct iommu_domain *domain,
 
         if (cap == IOMMU_CAP_CACHE_COHERENCY)
                 return dmar_domain->iommu_snooping;
+        if (cap == IOMMU_CAP_INTR_REMAP)
+                return intr_remapping_enabled;
 
         return 0;
 }
@@ -3747,6 +3751,12 @@ 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);