[PATCH] migration/colo.c: Add missed return in error handling

[Rao Lei]

When doing failover and checkpoint, some returns are missed in error
handling. Let's add it.

Signed-off-by: Lei Rao <lei....@intel.com>
---
 migration/colo.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/migration/colo.c b/migration/colo.c
index 5f7071b3cd..014d3cba01 100644
--- a/migration/colo.c
+++ b/migration/colo.c
@@ -94,12 +94,15 @@ static void secondary_vm_do_failover(void)
     if (local_err) {
         error_report_err(local_err);
         local_err = NULL;
+        return;
     }
 
     /* Notify all filters of all NIC to do checkpoint */
     colo_notify_filters_event(COLO_EVENT_FAILOVER, &local_err);
     if (local_err) {
         error_report_err(local_err);
+        local_err = NULL;
+        return;
     }
 
     if (!autostart) {
@@ -178,6 +181,7 @@ static void primary_vm_do_failover(void)
     if (local_err) {
         error_report_err(local_err);
         local_err = NULL;
+        return;
     }
 
     /* Notify COLO thread that failover work is finished */
@@ -507,12 +511,11 @@ static int colo_do_checkpoint_transaction(MigrationState 
*s,
         goto out;
     }
 
-    ret = 0;
-
     qemu_mutex_lock_iothread();
     vm_start();
     qemu_mutex_unlock_iothread();
     trace_colo_vm_state_change("stop", "run");
+    return 0;
 
 out:
     if (local_err) {
-- 
2.32.0