virtio-serial: Send out guest data to ports only if port is opened

Data should be written only when ports are open.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 3a09f0d3c631485c6240f0bad73a0c627719c58c..6befd4d139c5f676cd120739880c452869fd6876 100644 (file)
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -335,6 +335,11 @@ static void handle_output(VirtIODevice *vdev, VirtQueue *vq)
             goto next_buf;
         }
 
+       if (!port->host_connected) {
+            ret = 0;
+            goto next_buf;
+        }
+
         /*
          * A port may not have any handler registered for consuming the
          * data that the guest sends or it may not have a chardev associated