mlx4_ib_poll_cq
int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) {
ibdev->ib_dev.poll_cq = mlx4_ib_poll_cq;