1 files changed, 27 insertions, 49 deletions

diff --git a/drivers/infiniband/hw/hfi1/tid_rdma.c b/drivers/infiniband/hw/hfi1/tid_rdma.c
index 996fc298207e..6141f4edc6bf 100644
--- a/drivers/infiniband/hw/hfi1/tid_rdma.c
+++ b/drivers/infiniband/hw/hfi1/tid_rdma.c
@@ -2574,18 +2574,9 @@ void hfi1_kern_read_tid_flow_free(struct rvt_qp *qp)
 	hfi1_kern_clear_hw_flow(priv->rcd, qp);
 }
 
-static bool tid_rdma_tid_err(struct hfi1_ctxtdata *rcd,
-			     struct hfi1_packet *packet, u8 rcv_type,
-			     u8 opcode)
+static bool tid_rdma_tid_err(struct hfi1_packet *packet, u8 rcv_type)
 {
 	struct rvt_qp *qp = packet->qp;
-	struct hfi1_qp_priv *qpriv = qp->priv;
-	u32 ipsn;
-	struct ib_other_headers *ohdr = packet->ohdr;
-	struct rvt_ack_entry *e;
-	struct tid_rdma_request *req;
-	struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device);
-	u32 i;
 
 	if (rcv_type >= RHF_RCV_TYPE_IB)
 		goto done;
@@ -2602,41 +2593,9 @@ static bool tid_rdma_tid_err(struct hfi1_ctxtdata *rcd,
 	if (rcv_type == RHF_RCV_TYPE_EAGER) {
 		hfi1_restart_rc(qp, qp->s_last_psn + 1, 1);
 		hfi1_schedule_send(qp);
-		goto done_unlock;
-	}
-
-	/*
-	 * For TID READ response, error out QP after freeing the tid
-	 * resources.
-	 */
-	if (opcode == TID_OP(READ_RESP)) {
-		ipsn = mask_psn(be32_to_cpu(ohdr->u.tid_rdma.r_rsp.verbs_psn));
-		if (cmp_psn(ipsn, qp->s_last_psn) > 0 &&
-		    cmp_psn(ipsn, qp->s_psn) < 0) {
-			hfi1_kern_read_tid_flow_free(qp);
-			spin_unlock(&qp->s_lock);
-			rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
-			goto done;
-		}
-		goto done_unlock;
-	}
-
-	/*
-	 * Error out the qp for TID RDMA WRITE
-	 */
-	hfi1_kern_clear_hw_flow(qpriv->rcd, qp);
-	for (i = 0; i < rvt_max_atomic(rdi); i++) {
-		e = &qp->s_ack_queue[i];
-		if (e->opcode == TID_OP(WRITE_REQ)) {
-			req = ack_to_tid_req(e);
-			hfi1_kern_exp_rcv_clear_all(req);
-		}
 	}
-	spin_unlock(&qp->s_lock);
-	rvt_rc_error(qp, IB_WC_LOC_LEN_ERR);
-	goto done;
 
-done_unlock:
+	/* Since no payload is delivered, just drop the packet */
 	spin_unlock(&qp->s_lock);
 done:
 	return true;
@@ -2687,12 +2646,12 @@ static bool handle_read_kdeth_eflags(struct hfi1_ctxtdata *rcd,
 	u32 fpsn;
 
 	lockdep_assert_held(&qp->r_lock);
+	spin_lock(&qp->s_lock);
 	/* If the psn is out of valid range, drop the packet */
 	if (cmp_psn(ibpsn, qp->s_last_psn) < 0 ||
 	    cmp_psn(ibpsn, qp->s_psn) > 0)
-		return ret;
+		goto s_unlock;
 
-	spin_lock(&qp->s_lock);
 	/*
 	 * Note that NAKs implicitly ACK outstanding SEND and RDMA write
 	 * requests and implicitly NAK RDMA read and atomic requests issued
@@ -2740,9 +2699,12 @@ static bool handle_read_kdeth_eflags(struct hfi1_ctxtdata *rcd,
 
 		wqe = do_rc_completion(qp, wqe, ibp);
 		if (qp->s_acked == qp->s_tail)
-			break;
+			goto s_unlock;
 	}
 
+	if (qp->s_acked == qp->s_tail)
+		goto s_unlock;
+
 	/* Handle the eflags for the request */
 	if (wqe->wr.opcode != IB_WR_TID_RDMA_READ)
 		goto s_unlock;
@@ -2922,7 +2884,7 @@ bool hfi1_handle_kdeth_eflags(struct hfi1_ctxtdata *rcd,
 		if (lnh == HFI1_LRH_GRH)
 			goto r_unlock;
 
-		if (tid_rdma_tid_err(rcd, packet, rcv_type, opcode))
+		if (tid_rdma_tid_err(packet, rcv_type))
 			goto r_unlock;
 	}
 
@@ -2942,8 +2904,15 @@ bool hfi1_handle_kdeth_eflags(struct hfi1_ctxtdata *rcd,
 	 */
 	spin_lock(&qp->s_lock);
 	qpriv = qp->priv;
+	if (qpriv->r_tid_tail == HFI1_QP_WQE_INVALID ||
+	    qpriv->r_tid_tail == qpriv->r_tid_head)
+		goto unlock;
 	e = &qp->s_ack_queue[qpriv->r_tid_tail];
+	if (e->opcode != TID_OP(WRITE_REQ))
+		goto unlock;
 	req = ack_to_tid_req(e);
+	if (req->comp_seg == req->cur_seg)
+		goto unlock;
 	flow = &req->flows[req->clear_tail];
 	trace_hfi1_eflags_err_write(qp, rcv_type, rte, psn);
 	trace_hfi1_rsp_handle_kdeth_eflags(qp, psn);
@@ -4509,7 +4478,7 @@ void hfi1_rc_rcv_tid_rdma_ack(struct hfi1_packet *packet)
 	struct rvt_swqe *wqe;
 	struct tid_rdma_request *req;
 	struct tid_rdma_flow *flow;
-	u32 aeth, psn, req_psn, ack_psn, resync_psn, ack_kpsn;
+	u32 aeth, psn, req_psn, ack_psn, flpsn, resync_psn, ack_kpsn;
 	unsigned long flags;
 	u16 fidx;
 
@@ -4538,6 +4507,9 @@ void hfi1_rc_rcv_tid_rdma_ack(struct hfi1_packet *packet)
 		ack_kpsn--;
 	}
 
+	if (unlikely(qp->s_acked == qp->s_tail))
+		goto ack_op_err;
+
 	wqe = rvt_get_swqe_ptr(qp, qp->s_acked);
 
 	if (wqe->wr.opcode != IB_WR_TID_RDMA_WRITE)
@@ -4550,7 +4522,8 @@ void hfi1_rc_rcv_tid_rdma_ack(struct hfi1_packet *packet)
 	trace_hfi1_tid_flow_rcv_tid_ack(qp, req->acked_tail, flow);
 
 	/* Drop stale ACK/NAK */
-	if (cmp_psn(psn, full_flow_psn(flow, flow->flow_state.spsn)) < 0)
+	if (cmp_psn(psn, full_flow_psn(flow, flow->flow_state.spsn)) < 0 ||
+	    cmp_psn(req_psn, flow->flow_state.resp_ib_psn) < 0)
 		goto ack_op_err;
 
 	while (cmp_psn(ack_kpsn,
@@ -4712,7 +4685,12 @@ done:
 		switch ((aeth >> IB_AETH_CREDIT_SHIFT) &
 			IB_AETH_CREDIT_MASK) {
 		case 0: /* PSN sequence error */
+			if (!req->flows)
+				break;
 			flow = &req->flows[req->acked_tail];
+			flpsn = full_flow_psn(flow, flow->flow_state.lpsn);
+			if (cmp_psn(psn, flpsn) > 0)
+				break;
 			trace_hfi1_tid_flow_rcv_tid_ack(qp, req->acked_tail,
 							flow);
 			req->r_ack_psn = mask_psn(be32_to_cpu(ohdr->bth[2]));