failover: make sure that id always exist

We check that it exist at device creation time, so we don't have to
check anywhere else.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20201118083748.1328-22-quintela@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c
index 0e10f0466f..301089eaea 100644
--- a/softmmu/qdev-monitor.c
+++ b/softmmu/qdev-monitor.c
@@ -613,6 +613,10 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
     }
 
     if (qemu_opt_get(opts, "failover_pair_id")) {
+        if (!opts->id) {
+            error_setg(errp, "Device with failover_pair_id don't have id");
+            return NULL;
+        }
         if (qdev_should_hide_device(opts)) {
             if (bus && !qbus_is_hotpluggable(bus)) {
                 error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);