RDMA/rxe: Remove qp->comp.state

The rxe driver has four different QP state variables,
    qp->attr.qp_state,
    qp->req.state,
    qp->comp.state, and
    qp->resp.state.
All of these basically carry the same information.

This patch replaces uses of qp->comp.state by qp->attr.qp_state.  This is
the second of three patches which will remove all but the
qp->attr.qp_state variable. This will bring the driver closer to the IBA
description.

Link: https://lore.kernel.org/r/20230405042611.6467-2-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

Author: rpearsonhpe-design

drivers/infiniband/sw/rxe/rxe_comp.c

@@ -619,10 +619,10 @@ int rxe_completer(struct rxe_qp *qp)
 	enum comp_state state;
 	int ret;
 
-	if (!qp->valid || qp->comp.state == QP_STATE_ERROR ||
-	    qp->comp.state == QP_STATE_RESET) {
-		bool notify = qp->valid &&
-				(qp->comp.state == QP_STATE_ERROR);
+	if (!qp->valid || qp_state(qp) == IB_QPS_ERR ||
+	    qp_state(qp) == IB_QPS_RESET) {
+		bool notify = qp->valid && (qp_state(qp) == IB_QPS_ERR);
+
 		drain_resp_pkts(qp);
 		flush_send_queue(qp, notify);
 		goto exit;

drivers/infiniband/sw/rxe/rxe_qp.c

@@ -232,7 +232,6 @@ static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 					       QUEUE_TYPE_FROM_CLIENT);
 
 	qp->req.state		= QP_STATE_RESET;
-	qp->comp.state		= QP_STATE_RESET;
 	qp->req.opcode		= -1;
 	qp->comp.opcode		= -1;
 
@@ -477,7 +476,6 @@ static void rxe_qp_reset(struct rxe_qp *qp)
 
 	/* move qp to the reset state */
 	qp->req.state = QP_STATE_RESET;
-	qp->comp.state = QP_STATE_RESET;
 
 	/* drain work and packet queuesc */
 	rxe_requester(qp);
@@ -530,7 +528,6 @@ static void rxe_qp_drain(struct rxe_qp *qp)
 void rxe_qp_error(struct rxe_qp *qp)
 {
 	qp->req.state = QP_STATE_ERROR;
-	qp->comp.state = QP_STATE_ERROR;
 	qp->attr.qp_state = IB_QPS_ERR;
 
 	/* drain work and packet queues */
@@ -660,7 +657,6 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 		case IB_QPS_INIT:
 			rxe_dbg_qp(qp, "state -> INIT\n");
 			qp->req.state = QP_STATE_INIT;
-			qp->comp.state = QP_STATE_INIT;
 			break;
 
 		case IB_QPS_RTR:
@@ -670,7 +666,6 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 		case IB_QPS_RTS:
 			rxe_dbg_qp(qp, "state -> RTS\n");
 			qp->req.state = QP_STATE_READY;
-			qp->comp.state = QP_STATE_READY;
 			break;
 
 		case IB_QPS_SQD:

drivers/infiniband/sw/rxe/rxe_verbs.h

@@ -127,7 +127,6 @@ struct rxe_req_info {
 };
 
 struct rxe_comp_info {
-	enum rxe_qp_state	state;
 	u32			psn;
 	int			opcode;
 	int			timeout;