From: Prabhakar Kushwaha <pkushwaha@marvell.com>
Date: Wed, 11 Aug 2021 08:16:50 +0300
Subject: RDMA/qedr: Move variables reset to qedr_set_common_qp_params()
Patch-mainline: v5.15-rc1
Git-commit: 6ef793cbd4656a7a0637404751f608674692235d
References: jsc#SLE-18998

Qedr code is tightly coupled with existing both INIT transitions.  Here,
during first INIT transition all variables are reset and the RESET state
is checked in post_recv() before any posting.

Commit dc70f7c3ed34 ("RDMA/cma: Remove unnecessary INIT->INIT transition")
exposed this bug.

So moving variables reset to qedr_set_common_qp_params() and also avoid
RESET state check for post_recv().

Link: https://lore.kernel.org/r/20210811051650.14914-1-pkushwaha@marvell.com
Signed-off-by: Michal Kalderon <mkalderon@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: Shai Malin <smalin@marvell.com>
Signed-off-by: Prabhakar Kushwaha <pkushwaha@marvell.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/qedr/verbs.c |   32 ++++++++++++++------------------
 1 file changed, 14 insertions(+), 18 deletions(-)

--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -1339,6 +1339,15 @@ static int qedr_copy_qp_uresp(struct qed
 	return rc;
 }
 
+static void qedr_reset_qp_hwq_info(struct qedr_qp_hwq_info *qph)
+{
+	qed_chain_reset(&qph->pbl);
+	qph->prod = 0;
+	qph->cons = 0;
+	qph->wqe_cons = 0;
+	qph->db_data.data.value = cpu_to_le16(0);
+}
+
 static void qedr_set_common_qp_params(struct qedr_dev *dev,
 				      struct qedr_qp *qp,
 				      struct qedr_pd *pd,
@@ -1354,9 +1363,13 @@ static void qedr_set_common_qp_params(st
 	qp->qp_type = attrs->qp_type;
 	qp->max_inline_data = attrs->cap.max_inline_data;
 	qp->state = QED_ROCE_QP_STATE_RESET;
+
+	qp->prev_wqe_size = 0;
+
 	qp->signaled = (attrs->sq_sig_type == IB_SIGNAL_ALL_WR) ? true : false;
 	qp->dev = dev;
 	if (qedr_qp_has_sq(qp)) {
+		qedr_reset_qp_hwq_info(&qp->sq);
 		qp->sq.max_sges = attrs->cap.max_send_sge;
 		qp->sq_cq = get_qedr_cq(attrs->send_cq);
 		DP_DEBUG(dev, QEDR_MSG_QP,
@@ -1368,6 +1381,7 @@ static void qedr_set_common_qp_params(st
 		qp->srq = get_qedr_srq(attrs->srq);
 
 	if (qedr_qp_has_rq(qp)) {
+		qedr_reset_qp_hwq_info(&qp->rq);
 		qp->rq_cq = get_qedr_cq(attrs->recv_cq);
 		qp->rq.max_sges = attrs->cap.max_recv_sge;
 		DP_DEBUG(dev, QEDR_MSG_QP,
@@ -2342,15 +2356,6 @@ static enum qed_roce_qp_state qedr_get_s
 	}
 }
 
-static void qedr_reset_qp_hwq_info(struct qedr_qp_hwq_info *qph)
-{
-	qed_chain_reset(&qph->pbl);
-	qph->prod = 0;
-	qph->cons = 0;
-	qph->wqe_cons = 0;
-	qph->db_data.data.value = cpu_to_le16(0);
-}
-
 static int qedr_update_qp_state(struct qedr_dev *dev,
 				struct qedr_qp *qp,
 				enum qed_roce_qp_state cur_state,
@@ -2365,9 +2370,6 @@ static int qedr_update_qp_state(struct q
 	case QED_ROCE_QP_STATE_RESET:
 		switch (new_state) {
 		case QED_ROCE_QP_STATE_INIT:
-			qp->prev_wqe_size = 0;
-			qedr_reset_qp_hwq_info(&qp->sq);
-			qedr_reset_qp_hwq_info(&qp->rq);
 			break;
 		default:
 			status = -EINVAL;
@@ -3908,12 +3910,6 @@ int qedr_post_recv(struct ib_qp *ibqp, c
 
 	spin_lock_irqsave(&qp->q_lock, flags);
 
-	if (qp->state == QED_ROCE_QP_STATE_RESET) {
-		spin_unlock_irqrestore(&qp->q_lock, flags);
-		*bad_wr = wr;
-		return -EINVAL;
-	}
-
 	while (wr) {
 		int i;