virtio-serial: Propagate errors in initialising ports / devices in guest

If adding of ports or devices in the guest fails we can send out a QMP
event so that management software can deal with it.

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 c77ea4fefffada3aa31e297b6fef6b537532b343..3a09f0d3c631485c6240f0bad73a0c627719c58c 100644 (file)
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -223,6 +223,11 @@ static void handle_control_message(VirtIOSerial *vser, void *buf)
 
     switch(cpkt.event) {
     case VIRTIO_CONSOLE_DEVICE_READY:
+        if (!cpkt.value) {
+            error_report("virtio-serial-bus: Guest failure in adding device %s\n",
+                         vser->bus->qbus.name);
+            break;
+        }
         /*
          * The device is up, we can now tell the device about all the
          * ports we have here.
@@ -233,6 +238,11 @@ static void handle_control_message(VirtIOSerial *vser, void *buf)
         break;
 
     case VIRTIO_CONSOLE_PORT_READY:
+        if (!cpkt.value) {
+            error_report("virtio-serial-bus: Guest failure in adding port %u for device %s\n",
+                         port->id, vser->bus->qbus.name);
+            break;
+        }
         /*
          * Now that we know the guest asked for the port name, we're
          * sure the guest has initialised whatever state is necessary