From: Xie Yongji <xieyon...@baidu.com>
We will call virtio_set_status() on virtio_vmstate_change().
The "started" flag should not be changed in this case. Otherwise,
we may get an incorrect value when we set "started" flag but
not set DRIVER_OK in source VM.
Signed-off-by: Xie Yongji <xieyon...@baidu.com>
---
hw/virtio/virtio.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 3dc2f8c223..3960619bd4 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -1162,9 +1162,13 @@ int virtio_set_status(VirtIODevice *vdev, uint8_t val)
}
}
}
- vdev->started = val & VIRTIO_CONFIG_S_DRIVER_OK;
- if (unlikely(vdev->start_on_kick && vdev->started)) {
- vdev->start_on_kick = false;
+
+ if ((vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) !=
+ (val & VIRTIO_CONFIG_S_DRIVER_OK)) {
+ vdev->started = val & VIRTIO_CONFIG_S_DRIVER_OK;
+ if (unlikely(vdev->start_on_kick && vdev->started)) {
+ vdev->start_on_kick = false;
+ }
}
if (k->set_status) {
--
2.17.1
