From a78602118043eb9923996504d5b2e1b14a1ec38d Mon Sep 17 00:00:00 2001
From: libai <libai12@huawei.com>
Date: Thu, 21 Dec 2023 11:03:37 +0800
Subject: [PATCH] vdpa: suspend function return 0 when the vdpa device is
 stopped

When vhost vdpa device is stopped(vdpa->started is false), suspend
operation do nothing and return success, instead of return failure.

The same goes for resume function.

Signed-off-by: libai <libai12@huawei.com>
---
 hw/virtio/vdpa-dev-mig.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/hw/virtio/vdpa-dev-mig.c b/hw/virtio/vdpa-dev-mig.c
index 8b13f89c85..b889dd4715 100644
--- a/hw/virtio/vdpa-dev-mig.c
+++ b/hw/virtio/vdpa-dev-mig.c
@@ -134,8 +134,8 @@ static int vhost_vdpa_device_suspend(VhostVdpaDevice *vdpa)
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
     int ret;
 
-    if (!vdpa->started) {
-        return -EFAULT;
+    if (!vdpa->started || vdpa->suspended) {
+        return 0;
     }
 
     if (!k->set_guest_notifiers) {
@@ -178,6 +178,10 @@ static int vhost_vdpa_device_resume(VhostVdpaDevice *vdpa)
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
     int i, ret;
 
+    if (vdpa->started || !vdpa->suspended) {
+        return 0;
+    }
+
     if (!k->set_guest_notifiers) {
         error_report("binding does not support guest notifiers\n");
         return -ENOSYS;
-- 
2.27.0