We don't set enabled for legacy device, this turns out to be an issue
if we want to check it through vhost. So just simply set it when
setting pa of a virtqueue.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 hw/virtio/virtio-pci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index cb44e19b67..887ee2783c 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -306,8 +306,10 @@ static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
         if (pa == 0) {
             virtio_pci_reset(DEVICE(proxy));
         }
-        else
+        else {
             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
+            proxy->vqs[vdev->queue_sel].enabled = 1;
+        }
         break;
     case VIRTIO_PCI_QUEUE_SEL:
         if (val < VIRTIO_QUEUE_MAX)
-- 
2.19.1