From: Xie Yongji <xieyon...@baidu.com>
Currently, we use DRIVER_OK status bit to check whether guest
driver has started the device in virtio_vmstate_change(). But it's
not the case for virtio 1.0 transitional devices. If migration completes
between kicking virtqueue and setting VIRTIO_CONFIG_S_DRIVER_OK, guest
may be hung. So here we use started flag to check guest state instead.
Signed-off-by: Xie Yongji <xieyon...@baidu.com>
Signed-off-by: Zhang Yu <zhangy...@baidu.com>
Message-Id: <20190320112646.3712-3-xieyon...@baidu.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
hw/virtio/virtio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index af7b59b4ae..b8d36cd4b7 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2291,7 +2291,7 @@ static void virtio_vmstate_change(void *opaque, int
running, RunState state)
VirtIODevice *vdev = opaque;
BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
- bool backend_run = running && (vdev->status & VIRTIO_CONFIG_S_DRIVER_OK);
+ bool backend_run = running && vdev->started;
vdev->vm_running = running;
if (backend_run) {
--
MST
