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IB/mlx4: Check if SRQ is full when posting receive

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Make mlx4_post_srq_recv() fail if the SRQ is full (head == tail).

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier 2007-05-20 20:19:24 -07:00
parent 2446304dd6
commit 56a8c8b6ac
1 changed files with 6 additions and 0 deletions
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6
drivers/infiniband/hw/mlx4/srq.c
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@ -297,6 +297,12 @@ int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
break; break;
} }
if (unlikely(srq->head == srq->tail)) {
err = -ENOMEM;
*bad_wr = wr;
break;
}
srq->wrid[srq->head] = wr->wr_id; srq->wrid[srq->head] = wr->wr_id;
next = get_wqe(srq, srq->head); next = get_wqe(srq, srq->head);