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IB/mthca: reset QP's last pointers when transitioning to reset state

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last pointer is not updated when QP is modified to reset state.  This
causes data corruption if WQEs are already posted on the queue.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Michael S. Tsirkin 2005-11-28 11:19:43 -08:00 committed by Roland Dreier
parent 458af5439f
commit 187a25863f
1 changed files with 3 additions and 0 deletions
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drivers/infiniband/hw/mthca/mthca_qp.c
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@ -871,7 +871,10 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
mthca_wq_init(&qp->sq);
qp->sq.last = get_send_wqe(qp, qp->sq.max - 1);
mthca_wq_init(&qp->rq);
qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1);
if (mthca_is_memfree(dev)) {
*qp->sq.db = 0;