+ /*
+ * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE,
+ * since it is sent when virtio stops and device is destroyed.
+ * destroy_device waits for queues to be inactive, so it is safe.
+ * Otherwise taking the access_lock would cause a dead lock.
+ */
+ switch (msg.request.master) {
+ case VHOST_USER_SET_FEATURES:
+ case VHOST_USER_SET_PROTOCOL_FEATURES:
+ case VHOST_USER_SET_OWNER:
+ case VHOST_USER_RESET_OWNER:
+ case VHOST_USER_SET_MEM_TABLE:
+ case VHOST_USER_SET_LOG_BASE:
+ case VHOST_USER_SET_LOG_FD:
+ case VHOST_USER_SET_VRING_NUM:
+ case VHOST_USER_SET_VRING_ADDR:
+ case VHOST_USER_SET_VRING_BASE:
+ case VHOST_USER_SET_VRING_KICK:
+ case VHOST_USER_SET_VRING_CALL:
+ case VHOST_USER_SET_VRING_ERR:
+ case VHOST_USER_SET_VRING_ENABLE:
+ case VHOST_USER_SEND_RARP:
+ case VHOST_USER_NET_SET_MTU:
+ case VHOST_USER_SET_SLAVE_REQ_FD:
+ vhost_user_lock_all_queue_pairs(dev);
+ unlock_required = 1;
+ break;
+ default:
+ break;
+
+ }
+