vhost-vdpa: tweak the error label in vhost_vdpa_add()

Introduce new error label to avoid the unnecessary checking of net
pointer.

Fixes: 1e0a84e ("vhost-vdpa: introduce vhost-vdpa net client")
Signed-off-by: Jason Wang <[email protected]>
Message-Id: <[email protected]>
Reviewed-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>

Author: jasowang

net/vhost-vdpa.c

@@ -99,19 +99,18 @@ static int vhost_vdpa_add(NetClientState *ncs, void *be)
     net = vhost_net_init(&options);
     if (!net) {
         error_report("failed to init vhost_net for queue");
-        goto err;
+        goto err_init;
     }
     s->vhost_net = net;
     ret = vhost_vdpa_net_check_device_id(net);
     if (ret) {
-        goto err;
+        goto err_check;
     }
     return 0;
-err:
-    if (net) {
-        vhost_net_cleanup(net);
-        g_free(net);
-    }
+err_check:
+    vhost_net_cleanup(net);
+    g_free(net);
+err_init:
     return -1;
 }