virtio_net: Do DIM update for specified queue only

	struct virtnet_info *vi = rq->vq->vdev->priv;

	struct net_device *dev = vi->dev;

	struct dim_cq_moder update_moder;

	int i, qnum, err;

	int qnum, err;

	if (!rtnl_trylock())

		return;

	/* Each rxq's work is queued by "net_dim()->schedule_work()"

	 * in response to NAPI traffic changes. Note that dim->profile_ix

	 * for each rxq is updated prior to the queuing action.

	 * So we only need to traverse and update profiles for all rxqs

	 * in the work which is holding rtnl_lock.

	 */

	for (i = 0; i < vi->curr_queue_pairs; i++) {

		rq = &vi->rq[i];

		dim = &rq->dim;

	qnum = rq - vi->rq;

	if (!rq->dim_enabled)

			continue;

		goto out;

	update_moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix);

	if (update_moder.usec != rq->intr_coal.max_usecs ||

				 dev->name, qnum);

		dim->state = DIM_START_MEASURE;

	}

	}

out:

	rtnl_unlock();

}