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Commit ae3bca90 authored by Parav Pandit's avatar Parav Pandit Committed by Roland Dreier
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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: default avatarParav Pandit <parav.pandit@emulex.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent fea7a08a

drivers/infiniband/hw/ocrdma/ocrdma_verbs.c

+4 −4
Original line number Diff line number Diff line
@@ -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 */

	}



	ocrdma_hwq_inc_tail(&qp->sq);

	return expand;

}