vfio: Avoid error_propagate() after migrate_add_blocker()

When migrate_add_blocker(blocker, &err) is followed by
error_propagate(errp, err), we can often just as well do
migrate_add_blocker(..., errp).  This is the case in
vfio_migration_probe().

Prior art: commit 386f6c07d2 "error: Avoid error_propagate() after
migrate_add_blocker()".

Cc: Kirti Wankhede <kwankhede@nvidia.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210720125408.387910-8-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed by: Kirti Wankhede <kwankhede@nvidia.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
index 82f654afb64ad2e5b5a34ce52b49996fdbbc0831..ff6b45de6b557eeab37fe11bfcef8eefba9a90db 100644 (file)
--- a/hw/vfio/migration.c
+++ b/hw/vfio/migration.c
@@ -858,7 +858,6 @@ int vfio_migration_probe(VFIODevice *vbasedev, Error **errp)
 {
     VFIOContainer *container = vbasedev->group->container;
     struct vfio_region_info *info = NULL;
-    Error *local_err = NULL;
     int ret = -ENOTSUP;
 
     if (!vbasedev->enable_migration || !container->dirty_pages_supported) {
@@ -885,9 +884,8 @@ add_blocker:
                "VFIO device doesn't support migration");
     g_free(info);
 
-    ret = migrate_add_blocker(vbasedev->migration_blocker, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
+    ret = migrate_add_blocker(vbasedev->migration_blocker, errp);
+    if (ret < 0) {
         error_free(vbasedev->migration_blocker);
         vbasedev->migration_blocker = NULL;
     }