IB/mlx4: Check if SRQ is full when posting receive
Make mlx4_post_srq_recv() fail if the SRQ is full (head == tail). Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -297,6 +297,12 @@ int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
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break;
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}
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if (unlikely(srq->head == srq->tail)) {
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err = -ENOMEM;
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*bad_wr = wr;
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break;
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}
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srq->wrid[srq->head] = wr->wr_id;
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next = get_wqe(srq, srq->head);
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