net, virtio_net: replace the magic value

It is more appropriate to use # of queue pairs currently used by
the driver instead of a magic value.

Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 69fb225..69ad42b 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1606,8 +1606,8 @@
 	if (err)
 		goto free_stats;
 
-	netif_set_real_num_tx_queues(dev, 1);
-	netif_set_real_num_rx_queues(dev, 1);
+	netif_set_real_num_tx_queues(dev, vi->curr_queue_pairs);
+	netif_set_real_num_rx_queues(dev, vi->curr_queue_pairs);
 
 	err = register_netdev(dev);
 	if (err) {