[Qemu-devel] [RFC v10 09/19] vfio: extract vfio_register_container_listener from vfio_connect_container

[Chen Fan <chen.fan.fnst@cn.fujitsu.com>]

Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
---
 hw/vfio/common.c | 60 ++++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 39 insertions(+), 21 deletions(-)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 67881f7..df3171d 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -631,6 +631,38 @@ static void vfio_put_address_space(VFIOAddressSpace *space)
     }
 }
 
+static int vfio_register_container_listener(VFIOContainer *container,
+                                            AddressSpace *as)
+{
+    int ret;
+
+    if (!as) {
+        return 0;
+    }
+
+    container->iommu_data.type1.listener = vfio_memory_listener;
+    container->iommu_data.release = vfio_listener_release;
+
+    memory_listener_register(&container->iommu_data.type1.listener,
+                             as);
+
+    if (container->iommu_data.type1.error) {
+        ret = container->iommu_data.type1.error;
+        error_report("vfio: memory listener initialization failed for container");
+        goto listener_release_exit;
+    }
+
+    container->iommu_data.type1.initialized = true;
+    container->space->as = as;
+
+    return 0;
+
+listener_release_exit:
+    vfio_listener_release(container);
+
+    return ret;
+}
+
 static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
 {
     VFIOContainer *container;
@@ -684,20 +716,10 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
             goto free_container_exit;
         }
 
-        container->iommu_data.type1.listener = vfio_memory_listener;
-        container->iommu_data.release = vfio_listener_release;
-
-        memory_listener_register(&container->iommu_data.type1.listener,
-                                 container->space->as);
-
-        if (container->iommu_data.type1.error) {
-            ret = container->iommu_data.type1.error;
-            error_report("vfio: memory listener initialization failed for container");
-            goto listener_release_exit;
+        ret = vfio_register_container_listener(container, as);
+        if (ret) {
+            goto free_container_exit;
         }
-
-        container->iommu_data.type1.initialized = true;
-
     } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU)) {
         ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
         if (ret) {
@@ -724,12 +746,10 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
             goto free_container_exit;
         }
 
-        container->iommu_data.type1.listener = vfio_memory_listener;
-        container->iommu_data.release = vfio_listener_release;
-
-        memory_listener_register(&container->iommu_data.type1.listener,
-                                 container->space->as);
-
+        ret = vfio_register_container_listener(container, as);
+        if (ret) {
+            goto free_container_exit;
+        }
     } else {
         error_report("vfio: No available IOMMU models");
         ret = -EINVAL;
@@ -743,8 +763,6 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
     QLIST_INSERT_HEAD(&container->group_list, group, container_next);
 
     return 0;
-listener_release_exit:
-    vfio_listener_release(container);
 
 free_container_exit:
     g_free(container);
-- 
1.9.3