RDMA/ocrdma: Fix CQE expansion of unsignaled WQE

Fix CQE expansion of unsignaled WQE -- don't expand the CQE when the
WQE index of the completed CQE matches with last pending WQE (tail) in
the queue.

Signed-off-by: Parav Pandit <parav.pandit@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index cb5b7f7..b29a424 100644 (file)
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -2219,7 +2219,6 @@ static bool ocrdma_poll_success_scqe(struct ocrdma_qp *qp,
        u32 wqe_idx;
 
        if (!qp->wqe_wr_id_tbl[tail].signaled) {
-               expand = true;  /* CQE cannot be consumed yet */
                *polled = false;    /* WC cannot be consumed yet */
        } else {
                ibwc->status = IB_WC_SUCCESS;
@@ -2227,10 +2226,11 @@ static bool ocrdma_poll_success_scqe(struct ocrdma_qp *qp,
                ibwc->qp = &qp->ibqp;
                ocrdma_update_wc(qp, ibwc, tail);
                *polled = true;
-               wqe_idx = le32_to_cpu(cqe->wq.wqeidx) & OCRDMA_CQE_WQEIDX_MASK;
-               if (tail != wqe_idx)
-                       expand = true; /* Coalesced CQE can't be consumed yet */
        }
+       wqe_idx = le32_to_cpu(cqe->wq.wqeidx) & OCRDMA_CQE_WQEIDX_MASK;
+       if (tail != wqe_idx)
+               expand = true; /* Coalesced CQE can't be consumed yet */
+
        ocrdma_hwq_inc_tail(&qp->sq);
        return expand;
 }