2 files changed, 28 insertions, 20 deletions

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index b64502dfa9f4..e89daf1b21b4 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -266,7 +266,7 @@ static void swap_pci_ref(struct pci_dev **from, struct pci_dev *to)
 
 static int iommu_init_device(struct device *dev)
 {
-        struct pci_dev *dma_pdev, *pdev = to_pci_dev(dev);
+        struct pci_dev *dma_pdev = NULL, *pdev = to_pci_dev(dev);
         struct iommu_dev_data *dev_data;
         struct iommu_group *group;
         u16 alias;
@@ -293,7 +293,9 @@ static int iommu_init_device(struct device *dev)
                 dev_data->alias_data = alias_data;
 
                 dma_pdev = pci_get_bus_and_slot(alias >> 8, alias & 0xff);
-        } else
+        }
+
+        if (dma_pdev == NULL)
                 dma_pdev = pci_dev_get(pdev);
 
         /* Account for quirked devices */
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 7e83370e6fd2..f3b99e1c1042 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -256,72 +256,78 @@ static inline void iommu_set_fault_handler(struct iommu_domain *domain,
 {
 }
 
-int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group)
+static inline int iommu_attach_group(struct iommu_domain *domain,
+                                     struct iommu_group *group)
 {
         return -ENODEV;
 }
 
-void iommu_detach_group(struct iommu_domain *domain, struct iommu_group *group)
+static inline void iommu_detach_group(struct iommu_domain *domain,
+                                      struct iommu_group *group)
 {
 }
 
-struct iommu_group *iommu_group_alloc(void)
+static inline struct iommu_group *iommu_group_alloc(void)
 {
         return ERR_PTR(-ENODEV);
 }
 
-void *iommu_group_get_iommudata(struct iommu_group *group)
+static inline void *iommu_group_get_iommudata(struct iommu_group *group)
 {
         return NULL;
 }
 
-void iommu_group_set_iommudata(struct iommu_group *group, void *iommu_data,
-                               void (*release)(void *iommu_data))
+static inline void iommu_group_set_iommudata(struct iommu_group *group,
+                                             void *iommu_data,
+                                             void (*release)(void *iommu_data))
 {
 }
 
-int iommu_group_set_name(struct iommu_group *group, const char *name)
+static inline int iommu_group_set_name(struct iommu_group *group,
+                                       const char *name)
 {
         return -ENODEV;
 }
 
-int iommu_group_add_device(struct iommu_group *group, struct device *dev)
+static inline int iommu_group_add_device(struct iommu_group *group,
+                                         struct device *dev)
 {
         return -ENODEV;
 }
 
-void iommu_group_remove_device(struct device *dev)
+static inline void iommu_group_remove_device(struct device *dev)
 {
 }
 
-int iommu_group_for_each_dev(struct iommu_group *group, void *data,
-                             int (*fn)(struct device *, void *))
+static inline int iommu_group_for_each_dev(struct iommu_group *group,
+                                           void *data,
+                                           int (*fn)(struct device *, void *))
 {
         return -ENODEV;
 }
 
-struct iommu_group *iommu_group_get(struct device *dev)
+static inline struct iommu_group *iommu_group_get(struct device *dev)
 {
         return NULL;
 }
 
-void iommu_group_put(struct iommu_group *group)
+static inline void iommu_group_put(struct iommu_group *group)
 {
 }
 
-int iommu_group_register_notifier(struct iommu_group *group,
-                                  struct notifier_block *nb)
+static inline int iommu_group_register_notifier(struct iommu_group *group,
+                                                struct notifier_block *nb)
 {
         return -ENODEV;
 }
 
-int iommu_group_unregister_notifier(struct iommu_group *group,
-                                    struct notifier_block *nb)
+static inline int iommu_group_unregister_notifier(struct iommu_group *group,
+                                                  struct notifier_block *nb)
 {
         return 0;
 }
 
-int iommu_group_id(struct iommu_group *group)
+static inline int iommu_group_id(struct iommu_group *group)
 {
         return -ENODEV;
 }