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RDMA/cxgb4: Don't re-init wait object in init/fini paths

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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 <swise@opengridcomputing.com>
Cc: <stable@kernel.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Steve Wise
2011-01-10 17:41:43 -08:00
committed by Roland Dreier
parent c943109163
commit db8b101671
1 changed files with 0 additions and 2 deletions
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drivers/infiniband/hw/cxgb4/qp.c
-2
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@@ -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->cookie = (unsigned long) &ep->com.wr_wait;
wqe->u.fini.type = FW_RI_TYPE_FINI; wqe->u.fini.type = FW_RI_TYPE_FINI;
c4iw_init_wr_wait(&ep->com.wr_wait);
ret = c4iw_ofld_send(&rhp->rdev, skb); ret = c4iw_ofld_send(&rhp->rdev, skb);
if (ret) if (ret)
goto out; goto out;
@@ -1095,7 +1094,6 @@ static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp)
if (qhp->attr.mpa_attr.initiator) if (qhp->attr.mpa_attr.initiator)
build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init); 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); ret = c4iw_ofld_send(&rhp->rdev, skb);
if (ret) if (ret)
goto out; goto out;