From 3c283ea7ca1902b9d221897fd65c5edb1d16e004 Mon Sep 17 00:00:00 2001
From: Jinhua Cao <caojinhua1@huawei.com>
Date: Fri, 11 Feb 2022 20:33:47 +0800
Subject: [PATCH] i6300esb watchdog: bugfix: Add a runstate transition

QEMU will abort() for the reasons now:

    invalid runstate transition: 'prelaunch' -> 'postmigrate'
    Aborted

This happens when:
  |<- watchdog timeout happened, then sets reset_requested to
  |   SHUTDOWN_CAUSE_GUEST_RESET;
  |<- hot-migration thread sets vm state to RUN_STATE_FINISH_MIGRATE
  |   before the last time of migration;
  |<- main thread gets the change of reset_requested and triggers
  |   reset, then sets vm state to RUN_STATE_PRELAUNCH;
  |<- hot-migration thread sets vm state to RUN_STATE_POSTMIGRATE.

Then 'prelaunch' -> 'postmigrate' runstate transition will happen.
It is legal so add this transition to runstate_transitions_def.

Signed-off-by: Jinhua Cao <caojinhua1@huawei.com>
---
 softmmu/runstate.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/softmmu/runstate.c b/softmmu/runstate.c
index 5736d908db..680994cdf8 100644
--- a/softmmu/runstate.c
+++ b/softmmu/runstate.c
@@ -115,6 +115,7 @@ static const RunStateTransition runstate_transitions_def[] = {
     { RUN_STATE_PRELAUNCH, RUN_STATE_RUNNING },
     { RUN_STATE_PRELAUNCH, RUN_STATE_FINISH_MIGRATE },
     { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE },
+    { RUN_STATE_PRELAUNCH, RUN_STATE_POSTMIGRATE },
 
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING },
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PAUSED },
-- 
2.27.0