net: synchronize net_host_device_remove with host_net_remove_completion

Using net_host_check_device is unnecessary.  qemu_del_net_client asserts
for the non-peer case that it can only process NIC type NetClientStates,
and that assertion is valid for the peered case as well, so move it and
use the same check in net_host_device_remove.  host_net_remove_completion
is already checking the type.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NJason Wang <jasowang@redhat.com>
Message-id: 1419353600-30519-2-git-send-email-pbonzini@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

net/net.c

@@ -324,6 +324,8 @@ void qemu_del_net_client(NetClientState *nc)
     NetClientState *ncs[MAX_QUEUE_NUM];
     int queues, i;
 
+    assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
+
     /* If the NetClientState belongs to a multiqueue backend, we will change all
      * other NetClientStates also.
      */
@@ -355,8 +357,6 @@ void qemu_del_net_client(NetClientState *nc)
         return;
     }
 
-    assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
-
     for (i = 0; i < queues; i++) {
         qemu_cleanup_net_client(ncs[i]);
         qemu_free_net_client(ncs[i]);
@@ -991,7 +991,7 @@ void hmp_host_net_remove(Monitor *mon, const QDict *qdict)
                      device, vlan_id);
         return;
     }
-    if (!net_host_check_device(nc->model)) {
+    if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
         error_report("invalid host network device '%s'", device);
         return;
     }