From 56a8c8b6ac4d6edba5153d17730aaf96ba8f1f8c Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Sun, 20 May 2007 20:19:24 -0700 Subject: [PATCH] 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 --- drivers/infiniband/hw/mlx4/srq.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c index 42ab4a801d6a..12fac1c8989d 100644 --- a/drivers/infiniband/hw/mlx4/srq.c +++ b/drivers/infiniband/hw/mlx4/srq.c @@ -297,6 +297,12 @@ int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, break; } + if (unlikely(srq->head == srq->tail)) { + err = -ENOMEM; + *bad_wr = wr; + break; + } + srq->wrid[srq->head] = wr->wr_id; next = get_wqe(srq, srq->head); -- 2.20.1