block: Mark bdrv_filter_bs() and callers GRAPH_RDLOCK

[mirror_qemu.git] / block / vpc.c

diff --git a/block/vpc.c b/block/vpc.c
index ceb87dd3d8e208dfa38032a0ba9b9ea8fc898c1f..483775103c47b454655eb38b45292615477a0382 100644 (file)
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -446,12 +446,14 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags,
     }
 
     /* Disable migration when VHD images are used */
+    bdrv_graph_rdlock_main_loop();
     error_setg(&s->migration_blocker, "The vpc format used by node '%s' "
                "does not support live migration",
                bdrv_get_device_or_node_name(bs));
-    ret = migrate_add_blocker(s->migration_blocker, errp);
+    bdrv_graph_rdunlock_main_loop();
+
+    ret = migrate_add_blocker_normal(&s->migration_blocker, errp);
     if (ret < 0) {
-        error_free(s->migration_blocker);
         goto fail;
     }
 
@@ -1168,7 +1170,7 @@ fail:
 }
 
 
-static int vpc_has_zero_init(BlockDriverState *bs)
+static int GRAPH_RDLOCK vpc_has_zero_init(BlockDriverState *bs)
 {
     BDRVVPCState *s = bs->opaque;
 
@@ -1187,8 +1189,7 @@ static void vpc_close(BlockDriverState *bs)
     g_free(s->pageentry_u8);
 #endif
 
-    migrate_del_blocker(s->migration_blocker);
-    error_free(s->migration_blocker);
+    migrate_del_blocker(&s->migration_blocker);
 }
 
 static QemuOptsList vpc_create_opts = {