intel-iommu: make domain_add_dev_info() call domain_context_mapping()

All callers of the former were also calling the latter, in one order or
the other, and failing to correctly clean up if the second returned
failure.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 15 insertions, 20 deletions

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 3f256b8d83c1..09606e9aedec 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -2094,15 +2094,23 @@ static int identity_mapping(struct pci_dev *pdev)
 }
 
 static int domain_add_dev_info(struct dmar_domain *domain,
-                                  struct pci_dev *pdev)
+                               struct pci_dev *pdev,
+                               int translation)
 {
         struct device_domain_info *info;
         unsigned long flags;
+        int ret;
 
         info = alloc_devinfo_mem();
         if (!info)
                 return -ENOMEM;
 
+        ret = domain_context_mapping(domain, pdev, translation);
+        if (ret) {
+                free_devinfo_mem(info);
+                return ret;
+        }
+
         info->segment = pci_domain_nr(pdev->bus);
         info->bus = pdev->bus->number;
         info->devfn = pdev->devfn;
@@ -2173,15 +2181,11 @@ static int iommu_prepare_static_identity_mapping(int hw)
                         printk(KERN_INFO "IOMMU: %s identity mapping for device %s\n",
                                hw ? "hardware" : "software", pci_name(pdev));
 
-                        ret = domain_context_mapping(si_domain, pdev,
+                        ret = domain_add_dev_info(si_domain, pdev,
                                                      hw ? CONTEXT_TT_PASS_THROUGH :
                                                      CONTEXT_TT_MULTI_LEVEL);
                         if (ret)
                                 return ret;
-
-                        ret = domain_add_dev_info(si_domain, pdev);
-                        if (ret)
-                                return ret;
                 }
         }
 
@@ -2510,13 +2514,10 @@ static int iommu_no_mapping(struct device *dev)
                  */
                 if (iommu_should_identity_map(pdev, 0)) {
                         int ret;
-                        ret = domain_add_dev_info(si_domain, pdev);
-                        if (ret)
-                                return 0;
-                        ret = domain_context_mapping(si_domain, pdev,
-                                                     hw_pass_through ?
-                                                     CONTEXT_TT_PASS_THROUGH :
-                                                     CONTEXT_TT_MULTI_LEVEL);
+                        ret = domain_add_dev_info(si_domain, pdev,
+                                                  hw_pass_through ?
+                                                  CONTEXT_TT_PASS_THROUGH :
+                                                  CONTEXT_TT_MULTI_LEVEL);
                         if (!ret) {
                                 printk(KERN_INFO "64bit %s uses identity mapping\n",
                                        pci_name(pdev));
@@ -3486,7 +3487,6 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
         struct intel_iommu *iommu;
         int addr_width;
         u64 end;
-        int ret;
 
         /* normally pdev is not mapped */
         if (unlikely(domain_context_mapped(pdev))) {
@@ -3518,12 +3518,7 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
                 return -EFAULT;
         }
 
-        ret = domain_add_dev_info(dmar_domain, pdev);
-        if (ret)
-                return ret;
-
-        ret = domain_context_mapping(dmar_domain, pdev, CONTEXT_TT_MULTI_LEVEL);
-        return ret;
+        return domain_add_dev_info(dmar_domain, pdev, CONTEXT_TT_MULTI_LEVEL);
 }
 
 static void intel_iommu_detach_device(struct iommu_domain *domain,