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virtio: Don't change "started" flag on virtio_vmstate_change()

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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 <xieyongji@baidu.com>
Message-Id: <20190626023130.31315-6-xieyongji@baidu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xie Yongji 2019-06-26 10:31:30 +08:00 committed by Michael S. Tsirkin
parent 8b04e2c797
commit 4c5cf37b50
1 changed files with 4 additions and 1 deletions
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5
hw/virtio/virtio.c
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@ -1163,7 +1163,10 @@ int virtio_set_status(VirtIODevice *vdev, uint8_t val)
}
}
virtio_set_started(vdev, val & VIRTIO_CONFIG_S_DRIVER_OK);
if ((vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) !=
(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
virtio_set_started(vdev, val & VIRTIO_CONFIG_S_DRIVER_OK);
}
if (k->set_status) {
k->set_status(vdev, val);