IB/ipath: Fix RC and UC error handling

When errors are detected in RC, the QP should transition to the
IB_QPS_ERR state, not the IB_QPS_SQE state. Also, when the error is on
the responder side, the receive work completion error was incorrect
(remote vs. local).

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

5 files changed, 132 insertions, 224 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_qp.c b/drivers/infiniband/hw/ipath/ipath_qp.c
index dd5b6e9d57c2..6f98632877eb 100644
--- a/drivers/infiniband/hw/ipath/ipath_qp.c
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c
@@ -374,13 +374,14 @@ static void ipath_reset_qp(struct ipath_qp *qp, enum ib_qp_type type)
 }
 
 /**
- * ipath_error_qp - put a QP into an error state
- * @qp: the QP to put into an error state
+ * ipath_error_qp - put a QP into the error state
+ * @qp: the QP to put into the error state
  * @err: the receive completion error to signal if a RWQE is active
  *
  * Flushes both send and receive work queues.
  * Returns true if last WQE event should be generated.
  * The QP s_lock should be held and interrupts disabled.
+ * If we are already in error state, just return.
  */
 
 int ipath_error_qp(struct ipath_qp *qp, enum ib_wc_status err)
@@ -389,8 +390,10 @@ int ipath_error_qp(struct ipath_qp *qp, enum ib_wc_status err)
         struct ib_wc wc;
         int ret = 0;
 
-        ipath_dbg("QP%d/%d in error state (%d)\n",
-                  qp->ibqp.qp_num, qp->remote_qpn, err);
+        if (qp->state == IB_QPS_ERR)
+                goto bail;
+
+        qp->state = IB_QPS_ERR;
 
         spin_lock(&dev->pending_lock);
         if (!list_empty(&qp->timerwait))
@@ -460,6 +463,7 @@ int ipath_error_qp(struct ipath_qp *qp, enum ib_wc_status err)
         } else if (qp->ibqp.event_handler)
                 ret = 1;
 
+bail:
         return ret;
 }
 
@@ -1026,48 +1030,6 @@ bail:
 }
 
 /**
- * ipath_sqerror_qp - put a QP's send queue into an error state
- * @qp: QP who's send queue will be put into an error state
- * @wc: the WC responsible for putting the QP in this state
- *
- * Flushes the send work queue.
- * The QP s_lock should be held and interrupts disabled.
- */
-
-void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc)
-{
-        struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
-        struct ipath_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
-
-        ipath_dbg("Send queue error on QP%d/%d: err: %d\n",
-                  qp->ibqp.qp_num, qp->remote_qpn, wc->status);
-
-        spin_lock(&dev->pending_lock);
-        if (!list_empty(&qp->timerwait))
-                list_del_init(&qp->timerwait);
-        if (!list_empty(&qp->piowait))
-                list_del_init(&qp->piowait);
-        spin_unlock(&dev->pending_lock);
-
-        ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 1);
-        if (++qp->s_last >= qp->s_size)
-                qp->s_last = 0;
-
-        wc->status = IB_WC_WR_FLUSH_ERR;
-
-        while (qp->s_last != qp->s_head) {
-                wqe = get_swqe_ptr(qp, qp->s_last);
-                wc->wr_id = wqe->wr.wr_id;
-                wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
-                ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 1);
-                if (++qp->s_last >= qp->s_size)
-                        qp->s_last = 0;
-        }
-        qp->s_cur = qp->s_tail = qp->s_head;
-        qp->state = IB_QPS_SQE;
-}
-
-/**
  * ipath_get_credit - flush the send work queue of a QP
  * @qp: the qp who's send work queue to flush
  * @aeth: the Acknowledge Extended Transport Header
diff --git a/drivers/infiniband/hw/ipath/ipath_rc.c b/drivers/infiniband/hw/ipath/ipath_rc.c
index 08b11b567614..b4b26c3aa613 100644
--- a/drivers/infiniband/hw/ipath/ipath_rc.c
+++ b/drivers/infiniband/hw/ipath/ipath_rc.c
@@ -771,27 +771,14 @@ done:
  *
  * The QP s_lock should be held and interrupts disabled.
  */
-void ipath_restart_rc(struct ipath_qp *qp, u32 psn, struct ib_wc *wc)
+void ipath_restart_rc(struct ipath_qp *qp, u32 psn)
 {
         struct ipath_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
         struct ipath_ibdev *dev;
 
         if (qp->s_retry == 0) {
-                wc->wr_id = wqe->wr.wr_id;
-                wc->status = IB_WC_RETRY_EXC_ERR;
-                wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
-                wc->vendor_err = 0;
-                wc->byte_len = 0;
-                wc->qp = &qp->ibqp;
-                wc->imm_data = 0;
-                wc->src_qp = qp->remote_qpn;
-                wc->wc_flags = 0;
-                wc->pkey_index = 0;
-                wc->slid = qp->remote_ah_attr.dlid;
-                wc->sl = qp->remote_ah_attr.sl;
-                wc->dlid_path_bits = 0;
-                wc->port_num = 0;
-                ipath_sqerror_qp(qp, wc);
+                ipath_send_complete(qp, wqe, IB_WC_RETRY_EXC_ERR);
+                ipath_error_qp(qp, IB_WC_WR_FLUSH_ERR);
                 goto bail;
         }
         qp->s_retry--;
@@ -804,6 +791,8 @@ void ipath_restart_rc(struct ipath_qp *qp, u32 psn, struct ib_wc *wc)
         spin_lock(&dev->pending_lock);
         if (!list_empty(&qp->timerwait))
                 list_del_init(&qp->timerwait);
+        if (!list_empty(&qp->piowait))
+                list_del_init(&qp->piowait);
         spin_unlock(&dev->pending_lock);
 
         if (wqe->wr.opcode == IB_WR_RDMA_READ)
@@ -845,6 +834,7 @@ static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode,
 {
         struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
         struct ib_wc wc;
+        enum ib_wc_status status;
         struct ipath_swqe *wqe;
         int ret = 0;
         u32 ack_psn;
@@ -909,7 +899,7 @@ static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode,
                          */
                         update_last_psn(qp, wqe->psn - 1);
                         /* Retry this request. */
-                        ipath_restart_rc(qp, wqe->psn, &wc);
+                        ipath_restart_rc(qp, wqe->psn);
                         /*
                          * No need to process the ACK/NAK since we are
                          * restarting an earlier request.
@@ -937,20 +927,15 @@ static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode,
                 /* Post a send completion queue entry if requested. */
                 if (!(qp->s_flags & IPATH_S_SIGNAL_REQ_WR) ||
                     (wqe->wr.send_flags & IB_SEND_SIGNALED)) {
+                        memset(&wc, 0, sizeof wc);
                         wc.wr_id = wqe->wr.wr_id;
                         wc.status = IB_WC_SUCCESS;
                         wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
-                        wc.vendor_err = 0;
                         wc.byte_len = wqe->length;
-                        wc.imm_data = 0;
                         wc.qp = &qp->ibqp;
                         wc.src_qp = qp->remote_qpn;
-                        wc.wc_flags = 0;
-                        wc.pkey_index = 0;
                         wc.slid = qp->remote_ah_attr.dlid;
                         wc.sl = qp->remote_ah_attr.sl;
-                        wc.dlid_path_bits = 0;
-                        wc.port_num = 0;
                         ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 0);
                 }
                 qp->s_retry = qp->s_retry_cnt;
@@ -1012,7 +997,7 @@ static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode,
                 if (qp->s_last == qp->s_tail)
                         goto bail;
                 if (qp->s_rnr_retry == 0) {
-                        wc.status = IB_WC_RNR_RETRY_EXC_ERR;
+                        status = IB_WC_RNR_RETRY_EXC_ERR;
                         goto class_b;
                 }
                 if (qp->s_rnr_retry_cnt < 7)
@@ -1050,37 +1035,25 @@ static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode,
                          * RDMA READ response which terminates the RDMA
                          * READ.
                          */
-                        ipath_restart_rc(qp, psn, &wc);
+                        ipath_restart_rc(qp, psn);
                         break;
 
                 case 1: /* Invalid Request */
-                        wc.status = IB_WC_REM_INV_REQ_ERR;
+                        status = IB_WC_REM_INV_REQ_ERR;
                         dev->n_other_naks++;
                         goto class_b;
 
                 case 2: /* Remote Access Error */
-                        wc.status = IB_WC_REM_ACCESS_ERR;
+                        status = IB_WC_REM_ACCESS_ERR;
                         dev->n_other_naks++;
                         goto class_b;
 
                 case 3: /* Remote Operation Error */
-                        wc.status = IB_WC_REM_OP_ERR;
+                        status = IB_WC_REM_OP_ERR;
                         dev->n_other_naks++;
                 class_b:
-                        wc.wr_id = wqe->wr.wr_id;
-                        wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
-                        wc.vendor_err = 0;
-                        wc.byte_len = 0;
-                        wc.qp = &qp->ibqp;
-                        wc.imm_data = 0;
-                        wc.src_qp = qp->remote_qpn;
-                        wc.wc_flags = 0;
-                        wc.pkey_index = 0;
-                        wc.slid = qp->remote_ah_attr.dlid;
-                        wc.sl = qp->remote_ah_attr.sl;
-                        wc.dlid_path_bits = 0;
-                        wc.port_num = 0;
-                        ipath_sqerror_qp(qp, &wc);
+                        ipath_send_complete(qp, wqe, status);
+                        ipath_error_qp(qp, IB_WC_WR_FLUSH_ERR);
                         break;
 
                 default:
@@ -1126,8 +1099,8 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev,
                                      int header_in_data)
 {
         struct ipath_swqe *wqe;
+        enum ib_wc_status status;
         unsigned long flags;
-        struct ib_wc wc;
         int diff;
         u32 pad;
         u32 aeth;
@@ -1159,6 +1132,7 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev,
         if (unlikely(qp->s_last == qp->s_tail))
                 goto ack_done;
         wqe = get_swqe_ptr(qp, qp->s_last);
+        status = IB_WC_SUCCESS;
 
         switch (opcode) {
         case OP(ACKNOWLEDGE):
@@ -1200,7 +1174,7 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev,
                 /* no AETH, no ACK */
                 if (unlikely(ipath_cmp24(psn, qp->s_last_psn + 1))) {
                         dev->n_rdma_seq++;
-                        ipath_restart_rc(qp, qp->s_last_psn + 1, &wc);
+                        ipath_restart_rc(qp, qp->s_last_psn + 1);
                         goto ack_done;
                 }
                 if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ))
@@ -1261,7 +1235,7 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev,
                 /* ACKs READ req. */
                 if (unlikely(ipath_cmp24(psn, qp->s_last_psn + 1))) {
                         dev->n_rdma_seq++;
-                        ipath_restart_rc(qp, qp->s_last_psn + 1, &wc);
+                        ipath_restart_rc(qp, qp->s_last_psn + 1);
                         goto ack_done;
                 }
                 if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ))
@@ -1291,31 +1265,16 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev,
                 goto ack_done;
         }
 
-ack_done:
-        spin_unlock_irqrestore(&qp->s_lock, flags);
-        goto bail;
-
 ack_op_err:
-        wc.status = IB_WC_LOC_QP_OP_ERR;
+        status = IB_WC_LOC_QP_OP_ERR;
         goto ack_err;
 
 ack_len_err:
-        wc.status = IB_WC_LOC_LEN_ERR;
+        status = IB_WC_LOC_LEN_ERR;
 ack_err:
-        wc.wr_id = wqe->wr.wr_id;
-        wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
-        wc.vendor_err = 0;
-        wc.byte_len = 0;
-        wc.imm_data = 0;
-        wc.qp = &qp->ibqp;
-        wc.src_qp = qp->remote_qpn;
-        wc.wc_flags = 0;
-        wc.pkey_index = 0;
-        wc.slid = qp->remote_ah_attr.dlid;
-        wc.sl = qp->remote_ah_attr.sl;
-        wc.dlid_path_bits = 0;
-        wc.port_num = 0;
-        ipath_sqerror_qp(qp, &wc);
+        ipath_send_complete(qp, wqe, status);
+        ipath_error_qp(qp, IB_WC_WR_FLUSH_ERR);
+ack_done:
         spin_unlock_irqrestore(&qp->s_lock, flags);
 bail:
         return;
@@ -1523,13 +1482,12 @@ send_ack:
         return 0;
 }
 
-static void ipath_rc_error(struct ipath_qp *qp, enum ib_wc_status err)
+void ipath_rc_error(struct ipath_qp *qp, enum ib_wc_status err)
 {
         unsigned long flags;
         int lastwqe;
 
         spin_lock_irqsave(&qp->s_lock, flags);
-        qp->state = IB_QPS_ERR;
         lastwqe = ipath_error_qp(qp, err);
         spin_unlock_irqrestore(&qp->s_lock, flags);
 
@@ -1643,11 +1601,7 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
                     opcode == OP(SEND_LAST) ||
                     opcode == OP(SEND_LAST_WITH_IMMEDIATE))
                         break;
-        nack_inv:
-                ipath_rc_error(qp, IB_WC_REM_INV_REQ_ERR);
-                qp->r_nak_state = IB_NAK_INVALID_REQUEST;
-                qp->r_ack_psn = qp->r_psn;
-                goto send_ack;
+                goto nack_inv;
 
         case OP(RDMA_WRITE_FIRST):
         case OP(RDMA_WRITE_MIDDLE):
@@ -1673,18 +1627,13 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
                 break;
         }
 
-        wc.imm_data = 0;
-        wc.wc_flags = 0;
+        memset(&wc, 0, sizeof wc);
 
         /* OK, process the packet. */
         switch (opcode) {
         case OP(SEND_FIRST):
-                if (!ipath_get_rwqe(qp, 0)) {
-                rnr_nak:
-                        qp->r_nak_state = IB_RNR_NAK | qp->r_min_rnr_timer;
-                        qp->r_ack_psn = qp->r_psn;
-                        goto send_ack;
-                }
+                if (!ipath_get_rwqe(qp, 0))
+                        goto rnr_nak;
                 qp->r_rcv_len = 0;
                 /* FALLTHROUGH */
         case OP(SEND_MIDDLE):
@@ -1751,14 +1700,10 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
                         wc.opcode = IB_WC_RECV_RDMA_WITH_IMM;
                 else
                         wc.opcode = IB_WC_RECV;
-                wc.vendor_err = 0;
                 wc.qp = &qp->ibqp;
                 wc.src_qp = qp->remote_qpn;
-                wc.pkey_index = 0;
                 wc.slid = qp->remote_ah_attr.dlid;
                 wc.sl = qp->remote_ah_attr.sl;
-                wc.dlid_path_bits = 0;
-                wc.port_num = 0;
                 /* Signal completion event if the solicited bit is set. */
                 ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
                                (ohdr->bth[0] &
@@ -1951,11 +1896,21 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
                 goto send_ack;
         goto done;
 
+rnr_nak:
+        qp->r_nak_state = IB_RNR_NAK | qp->r_min_rnr_timer;
+        qp->r_ack_psn = qp->r_psn;
+        goto send_ack;
+
+nack_inv:
+        ipath_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
+        qp->r_nak_state = IB_NAK_INVALID_REQUEST;
+        qp->r_ack_psn = qp->r_psn;
+        goto send_ack;
+
 nack_acc:
-        ipath_rc_error(qp, IB_WC_REM_ACCESS_ERR);
+        ipath_rc_error(qp, IB_WC_LOC_PROT_ERR);
         qp->r_nak_state = IB_NAK_REMOTE_ACCESS_ERROR;
         qp->r_ack_psn = qp->r_psn;
-
 send_ack:
         send_rc_ack(qp);
 
diff --git a/drivers/infiniband/hw/ipath/ipath_ruc.c b/drivers/infiniband/hw/ipath/ipath_ruc.c
index 9e3fe61cbd08..c716a03dd399 100644
--- a/drivers/infiniband/hw/ipath/ipath_ruc.c
+++ b/drivers/infiniband/hw/ipath/ipath_ruc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
+ * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
  * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
  *
  * This software is available to you under a choice of one of two
@@ -140,20 +140,11 @@ int ipath_init_sge(struct ipath_qp *qp, struct ipath_rwqe *wqe,
         goto bail;
 
 bad_lkey:
+        memset(&wc, 0, sizeof(wc));
         wc.wr_id = wqe->wr_id;
         wc.status = IB_WC_LOC_PROT_ERR;
         wc.opcode = IB_WC_RECV;
-        wc.vendor_err = 0;
-        wc.byte_len = 0;
-        wc.imm_data = 0;
         wc.qp = &qp->ibqp;
-        wc.src_qp = 0;
-        wc.wc_flags = 0;
-        wc.pkey_index = 0;
-        wc.slid = 0;
-        wc.sl = 0;
-        wc.dlid_path_bits = 0;
-        wc.port_num = 0;
         /* Signal solicited completion event. */
         ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
         ret = 0;
@@ -270,6 +261,7 @@ static void ipath_ruc_loopback(struct ipath_qp *sqp)
         struct ib_wc wc;
         u64 sdata;
         atomic64_t *maddr;
+        enum ib_wc_status send_status;
 
         qp = ipath_lookup_qpn(&dev->qp_table, sqp->remote_qpn);
         if (!qp) {
@@ -300,8 +292,8 @@ again:
         wqe = get_swqe_ptr(sqp, sqp->s_last);
         spin_unlock_irqrestore(&sqp->s_lock, flags);
 
-        wc.wc_flags = 0;
-        wc.imm_data = 0;
+        memset(&wc, 0, sizeof wc);
+        send_status = IB_WC_SUCCESS;
 
         sqp->s_sge.sge = wqe->sg_list[0];
         sqp->s_sge.sg_list = wqe->sg_list + 1;
@@ -313,75 +305,33 @@ again:
                 wc.imm_data = wqe->wr.ex.imm_data;
                 /* FALLTHROUGH */
         case IB_WR_SEND:
-                if (!ipath_get_rwqe(qp, 0)) {
-                rnr_nak:
-                        /* Handle RNR NAK */
-                        if (qp->ibqp.qp_type == IB_QPT_UC)
-                                goto send_comp;
-                        if (sqp->s_rnr_retry == 0) {
-                                wc.status = IB_WC_RNR_RETRY_EXC_ERR;
-                                goto err;
-                        }
-                        if (sqp->s_rnr_retry_cnt < 7)
-                                sqp->s_rnr_retry--;
-                        dev->n_rnr_naks++;
-                        sqp->s_rnr_timeout =
-                                ib_ipath_rnr_table[qp->r_min_rnr_timer];
-                        ipath_insert_rnr_queue(sqp);
-                        goto done;
-                }
+                if (!ipath_get_rwqe(qp, 0))
+                        goto rnr_nak;
                 break;
 
         case IB_WR_RDMA_WRITE_WITH_IMM:
-                if (unlikely(!(qp->qp_access_flags &
-                               IB_ACCESS_REMOTE_WRITE))) {
-                        wc.status = IB_WC_REM_INV_REQ_ERR;
-                        goto err;
-                }
+                if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_WRITE)))
+                        goto inv_err;
                 wc.wc_flags = IB_WC_WITH_IMM;
                 wc.imm_data = wqe->wr.ex.imm_data;
                 if (!ipath_get_rwqe(qp, 1))
                         goto rnr_nak;
                 /* FALLTHROUGH */
         case IB_WR_RDMA_WRITE:
-                if (unlikely(!(qp->qp_access_flags &
-                               IB_ACCESS_REMOTE_WRITE))) {
-                        wc.status = IB_WC_REM_INV_REQ_ERR;
-                        goto err;
-                }
+                if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_WRITE)))
+                        goto inv_err;
                 if (wqe->length == 0)
                         break;
                 if (unlikely(!ipath_rkey_ok(qp, &qp->r_sge, wqe->length,
                                             wqe->wr.wr.rdma.remote_addr,
                                             wqe->wr.wr.rdma.rkey,
-                                            IB_ACCESS_REMOTE_WRITE))) {
-                acc_err:
-                        wc.status = IB_WC_REM_ACCESS_ERR;
-                err:
-                        wc.wr_id = wqe->wr.wr_id;
-                        wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
-                        wc.vendor_err = 0;
-                        wc.byte_len = 0;
-                        wc.qp = &sqp->ibqp;
-                        wc.src_qp = sqp->remote_qpn;
-                        wc.pkey_index = 0;
-                        wc.slid = sqp->remote_ah_attr.dlid;
-                        wc.sl = sqp->remote_ah_attr.sl;
-                        wc.dlid_path_bits = 0;
-                        wc.port_num = 0;
-                        spin_lock_irqsave(&sqp->s_lock, flags);
-                        ipath_sqerror_qp(sqp, &wc);
-                        spin_unlock_irqrestore(&sqp->s_lock, flags);
-                        goto done;
-                }
+                                            IB_ACCESS_REMOTE_WRITE)))
+                        goto acc_err;
                 break;
 
         case IB_WR_RDMA_READ:
-                if (unlikely(!(qp->qp_access_flags &
-                               IB_ACCESS_REMOTE_READ))) {
-                        wc.status = IB_WC_REM_INV_REQ_ERR;
-                        goto err;
-                }
+                if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_READ)))
+                        goto inv_err;
                 if (unlikely(!ipath_rkey_ok(qp, &sqp->s_sge, wqe->length,
                                             wqe->wr.wr.rdma.remote_addr,
                                             wqe->wr.wr.rdma.rkey,
@@ -394,11 +344,8 @@ again:
 
         case IB_WR_ATOMIC_CMP_AND_SWP:
         case IB_WR_ATOMIC_FETCH_AND_ADD:
-                if (unlikely(!(qp->qp_access_flags &
-                               IB_ACCESS_REMOTE_ATOMIC))) {
-                        wc.status = IB_WC_REM_INV_REQ_ERR;
-                        goto err;
-                }
+                if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_ATOMIC)))
+                        goto inv_err;
                 if (unlikely(!ipath_rkey_ok(qp, &qp->r_sge, sizeof(u64),
                                             wqe->wr.wr.atomic.remote_addr,
                                             wqe->wr.wr.atomic.rkey,
@@ -415,7 +362,8 @@ again:
                 goto send_comp;
 
         default:
-                goto done;
+                send_status = IB_WC_LOC_QP_OP_ERR;
+                goto serr;
         }
 
         sge = &sqp->s_sge.sge;
@@ -458,14 +406,11 @@ again:
                 wc.opcode = IB_WC_RECV;
         wc.wr_id = qp->r_wr_id;
         wc.status = IB_WC_SUCCESS;
-        wc.vendor_err = 0;
         wc.byte_len = wqe->length;
         wc.qp = &qp->ibqp;
         wc.src_qp = qp->remote_qpn;
-        wc.pkey_index = 0;
         wc.slid = qp->remote_ah_attr.dlid;
         wc.sl = qp->remote_ah_attr.sl;
-        wc.dlid_path_bits = 0;
         wc.port_num = 1;
         /* Signal completion event if the solicited bit is set. */
         ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
@@ -473,9 +418,63 @@ again:
 
 send_comp:
         sqp->s_rnr_retry = sqp->s_rnr_retry_cnt;
-        ipath_send_complete(sqp, wqe, IB_WC_SUCCESS);
+        ipath_send_complete(sqp, wqe, send_status);
         goto again;
 
+rnr_nak:
+        /* Handle RNR NAK */
+        if (qp->ibqp.qp_type == IB_QPT_UC)
+                goto send_comp;
+        /*
+         * Note: we don't need the s_lock held since the BUSY flag
+         * makes this single threaded.
+         */
+        if (sqp->s_rnr_retry == 0) {
+                send_status = IB_WC_RNR_RETRY_EXC_ERR;
+                goto serr;
+        }
+        if (sqp->s_rnr_retry_cnt < 7)
+                sqp->s_rnr_retry--;
+        spin_lock_irqsave(&sqp->s_lock, flags);
+        if (!(ib_ipath_state_ops[sqp->state] & IPATH_PROCESS_RECV_OK))
+                goto unlock;
+        dev->n_rnr_naks++;
+        sqp->s_rnr_timeout = ib_ipath_rnr_table[qp->r_min_rnr_timer];
+        ipath_insert_rnr_queue(sqp);
+        goto unlock;
+
+inv_err:
+        send_status = IB_WC_REM_INV_REQ_ERR;
+        wc.status = IB_WC_LOC_QP_OP_ERR;
+        goto err;
+
+acc_err:
+        send_status = IB_WC_REM_ACCESS_ERR;
+        wc.status = IB_WC_LOC_PROT_ERR;
+err:
+        /* responder goes to error state */
+        ipath_rc_error(qp, wc.status);
+
+serr:
+        spin_lock_irqsave(&sqp->s_lock, flags);
+        ipath_send_complete(sqp, wqe, send_status);
+        if (sqp->ibqp.qp_type == IB_QPT_RC) {
+                int lastwqe = ipath_error_qp(sqp, IB_WC_WR_FLUSH_ERR);
+
+                sqp->s_flags &= ~IPATH_S_BUSY;
+                spin_unlock_irqrestore(&sqp->s_lock, flags);
+                if (lastwqe) {
+                        struct ib_event ev;
+
+                        ev.device = sqp->ibqp.device;
+                        ev.element.qp = &sqp->ibqp;
+                        ev.event = IB_EVENT_QP_LAST_WQE_REACHED;
+                        sqp->ibqp.event_handler(&ev, sqp->ibqp.qp_context);
+                }
+                goto done;
+        }
+unlock:
+        spin_unlock_irqrestore(&sqp->s_lock, flags);
 done:
         if (atomic_dec_and_test(&qp->refcount))
                 wake_up(&qp->wait);
@@ -651,21 +650,15 @@ void ipath_send_complete(struct ipath_qp *qp, struct ipath_swqe *wqe,
             status != IB_WC_SUCCESS) {
                 struct ib_wc wc;
 
+                memset(&wc, 0, sizeof wc);
                 wc.wr_id = wqe->wr.wr_id;
                 wc.status = status;
                 wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
-                wc.vendor_err = 0;
-                wc.byte_len = wqe->length;
-                wc.imm_data = 0;
                 wc.qp = &qp->ibqp;
-                wc.src_qp = 0;
-                wc.wc_flags = 0;
-                wc.pkey_index = 0;
-                wc.slid = 0;
-                wc.sl = 0;
-                wc.dlid_path_bits = 0;
-                wc.port_num = 0;
-                ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 0);
+                if (status == IB_WC_SUCCESS)
+                        wc.byte_len = wqe->length;
+                ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc,
+                               status != IB_WC_SUCCESS);
         }
 
         spin_lock_irqsave(&qp->s_lock, flags);
diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.c b/drivers/infiniband/hw/ipath/ipath_verbs.c
index 5015cd2e57bd..22bb42dc8f73 100644
--- a/drivers/infiniband/hw/ipath/ipath_verbs.c
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.c
@@ -744,12 +744,10 @@ static void ipath_ib_timer(struct ipath_ibdev *dev)
 
         /* XXX What if timer fires again while this is running? */
         for (qp = resend; qp != NULL; qp = qp->timer_next) {
-                struct ib_wc wc;
-
                 spin_lock_irqsave(&qp->s_lock, flags);
                 if (qp->s_last != qp->s_tail && qp->state == IB_QPS_RTS) {
                         dev->n_timeouts++;
-                        ipath_restart_rc(qp, qp->s_last_psn + 1, &wc);
+                        ipath_restart_rc(qp, qp->s_last_psn + 1);
                 }
                 spin_unlock_irqrestore(&qp->s_lock, flags);
 
diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.h b/drivers/infiniband/hw/ipath/ipath_verbs.h
index 6514aa8306cd..4c7c2aa8e19d 100644
--- a/drivers/infiniband/hw/ipath/ipath_verbs.h
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.h
@@ -710,8 +710,6 @@ void ipath_free_all_qps(struct ipath_qp_table *qpt);
 
 int ipath_init_qp_table(struct ipath_ibdev *idev, int size);
 
-void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc);
-
 void ipath_get_credit(struct ipath_qp *qp, u32 aeth);
 
 unsigned ipath_ib_rate_to_mult(enum ib_rate rate);
@@ -729,7 +727,9 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
                   int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
 
-void ipath_restart_rc(struct ipath_qp *qp, u32 psn, struct ib_wc *wc);
+void ipath_restart_rc(struct ipath_qp *qp, u32 psn);
+
+void ipath_rc_error(struct ipath_qp *qp, enum ib_wc_status err);
 
 int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr);