commit: db8b10167126d72829653690f57b9c7ca53c4d54 From: Steve Wise <[email protected]> Date: Mon, 10 Jan 2011 17:41:43 -0800 Subject: [PATCH] RDMA/cxgb4: Don't re-init wait object in init/fini paths
Re-initializing the wait object in rdma_init()/rdma_fini() causes a timing window which can lead to a deadlock during close. Once this deadlock hits, all RDMA activity over the T4 device will be stuck. There's no need to re-init the wait object, so remove it. Signed-off-by: Steve Wise <[email protected]> Cc: <[email protected]> Signed-off-by: Roland Dreier <[email protected]> --- drivers/infiniband/hw/cxgb4/qp.c | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c index 565a061..2080090 100644 --- a/drivers/infiniband/hw/cxgb4/qp.c +++ b/drivers/infiniband/hw/cxgb4/qp.c @@ -999,7 +999,6 @@ static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, wqe->cookie = (unsigned long) &ep->com.wr_wait; wqe->u.fini.type = FW_RI_TYPE_FINI; - c4iw_init_wr_wait(&ep->com.wr_wait); ret = c4iw_ofld_send(&rhp->rdev, skb); if (ret) goto out; @@ -1095,7 +1094,6 @@ static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp) if (qhp->attr.mpa_attr.initiator) build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init); - c4iw_init_wr_wait(&qhp->ep->com.wr_wait); ret = c4iw_ofld_send(&rhp->rdev, skb); if (ret) goto out; _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
