[PULL 42/42] vfio/container: Move vfio_container_destroy() to an instance_finalize() handler

["Cédric Le Goater" <clg@redhat.com>]

vfio_container_destroy() clears the resources allocated
VFIOContainerBase object. Now that VFIOContainerBase is a QOM object,
add an instance_finalize() handler to do the cleanup. It will be
called through object_unref().

Suggested-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 include/hw/vfio/vfio-container-base.h | 3 ---
 hw/vfio/container-base.c              | 4 +++-
 hw/vfio/container.c                   | 2 --
 hw/vfio/iommufd.c                     | 1 -
 4 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h
index 6242a62771caa8cf19440a53ad6f4db862ca12d7..419e45ee7a5ac960dae4a993127fc9ee66d48db2 100644
--- a/include/hw/vfio/vfio-container-base.h
+++ b/include/hw/vfio/vfio-container-base.h
@@ -86,9 +86,6 @@ int vfio_container_set_dirty_page_tracking(VFIOContainerBase *bcontainer,
 int vfio_container_query_dirty_bitmap(const VFIOContainerBase *bcontainer,
                    VFIOBitmap *vbmap, hwaddr iova, hwaddr size, Error **errp);
 
-void vfio_container_destroy(VFIOContainerBase *bcontainer);
-
-
 #define TYPE_VFIO_IOMMU "vfio-iommu"
 #define TYPE_VFIO_IOMMU_LEGACY TYPE_VFIO_IOMMU "-legacy"
 #define TYPE_VFIO_IOMMU_SPAPR TYPE_VFIO_IOMMU "-spapr"
diff --git a/hw/vfio/container-base.c b/hw/vfio/container-base.c
index 970ae2356a92f87df44e1dd58ff8c67045a24ef1..50b1664f89a8192cf4021498e59f2a92cd2f6e89 100644
--- a/hw/vfio/container-base.c
+++ b/hw/vfio/container-base.c
@@ -83,8 +83,9 @@ int vfio_container_query_dirty_bitmap(const VFIOContainerBase *bcontainer,
                                                errp);
 }
 
-void vfio_container_destroy(VFIOContainerBase *bcontainer)
+static void vfio_container_instance_finalize(Object *obj)
 {
+    VFIOContainerBase *bcontainer = VFIO_IOMMU(obj);
     VFIOGuestIOMMU *giommu, *tmp;
 
     QLIST_REMOVE(bcontainer, next);
@@ -116,6 +117,7 @@ static const TypeInfo types[] = {
         .name = TYPE_VFIO_IOMMU,
         .parent = TYPE_OBJECT,
         .instance_init = vfio_container_instance_init,
+        .instance_finalize = vfio_container_instance_finalize,
         .instance_size = sizeof(VFIOContainerBase),
         .class_size = sizeof(VFIOIOMMUClass),
         .abstract = true,
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index 45123acbdd6a681f4ce7cae7aa2509100ea225ab..2e7ecdf10edc4d84963a45ae9507096965da64fc 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -712,8 +712,6 @@ static void vfio_disconnect_container(VFIOGroup *group)
     if (QLIST_EMPTY(&container->group_list)) {
         VFIOAddressSpace *space = bcontainer->space;
 
-        vfio_container_destroy(bcontainer);
-
         trace_vfio_disconnect_container(container->fd);
         vfio_cpr_unregister_container(bcontainer);
         close(container->fd);
diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index 09b71a6617807c621275c74b924cfd39eb643961..c2f158e60386502eef267769ac9bce1effb67033 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -237,7 +237,6 @@ static void iommufd_cdev_container_destroy(VFIOIOMMUFDContainer *container)
         return;
     }
     memory_listener_unregister(&bcontainer->listener);
-    vfio_container_destroy(bcontainer);
     iommufd_backend_free_id(container->be, container->ioas_id);
     object_unref(container);
 }
-- 
2.45.2