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Subject[git patch review 1/2] 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>

---

drivers/infiniband/hw/mthca/mthca_qp.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

applies-to: 1e8504d2a91579756c89ef2d65ebd526f973cde8
187a25863fe014486ee834164776b2a587d6934d
diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index dd4e133..f9c8eb9 100644
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -871,7 +871,10 @@ int mthca_modify_qp(struct ib_qp *ibqp,
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;
---
0.99.9k
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