[PATCH v10 22/27] migration: push Error **errp into loadvm_postcopy_handle_switchover_start()

[Arun Menon <armenon@redhat.com>]

This is an incremental step in converting vmstate loading code to report
error via Error objects instead of directly printing it to console/monitor.
It is ensured that loadvm_postcopy_handle_switchover_start() must report
an error in errp, in case of failure.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Arun Menon <armenon@redhat.com>
---
 migration/savevm.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/migration/savevm.c b/migration/savevm.c
index c5566199d00893c4e083ecd27a55da832e2df574..de2bce276faa863a0f25deedafb0b784f10559d7 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2538,7 +2538,7 @@ static int loadvm_process_enable_colo(MigrationIncomingState *mis,
     return ret;
 }
 
-static int loadvm_postcopy_handle_switchover_start(void)
+static int loadvm_postcopy_handle_switchover_start(Error **errp)
 {
     SaveStateEntry *se;
 
@@ -2551,6 +2551,7 @@ static int loadvm_postcopy_handle_switchover_start(void)
 
         ret = se->ops->switchover_start(se->opaque);
         if (ret < 0) {
+            error_setg(errp, "Switchover start failed: %d", ret);
             return ret;
         }
     }
@@ -2657,11 +2658,7 @@ static int loadvm_process_command(QEMUFile *f, Error **errp)
         return loadvm_process_enable_colo(mis, errp);
 
     case MIG_CMD_SWITCHOVER_START:
-        ret = loadvm_postcopy_handle_switchover_start();
-        if (ret < 0) {
-            error_setg(errp, "Failed to load device state command: %d", ret);
-        }
-        return ret;
+        return loadvm_postcopy_handle_switchover_start(errp);
     }
 
     return 0;

-- 
2.50.1