linux-kernel - [PATCH 4.19 053/639] RDMA/bnxt_re: Add missing spin lock initialization

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Date:   Fri, 24 Jan 2020 10:23:43 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Selvin Xavier <selvin.xavier@...adcom.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 053/639] RDMA/bnxt_re: Add missing spin lock initialization

From: Selvin Xavier <selvin.xavier@...adcom.com>

[ Upstream commit 5a23e0b1dd51fe0efae666b03fdb15e1301f437a ]

Add the missing initalization of the cq_lock and qplib.flush_lock.

Fixes: 942c9b6ca8de ("RDMA/bnxt_re: Avoid Hard lockup during error CQE processing")
Signed-off-by: Selvin Xavier <selvin.xavier@...adcom.com>
Signed-off-by: Jason Gunthorpe <jgg@...lanox.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/hw/bnxt_re/ib_verbs.c | 1 +
 drivers/infiniband/hw/bnxt_re/qplib_fp.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index a69632f1fab0b..c9af2d139f5cb 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -2664,6 +2664,7 @@ struct ib_cq *bnxt_re_create_cq(struct ib_device *ibdev,
 	nq->budget++;
 
 	atomic_inc(&rdev->cq_count);
+	spin_lock_init(&cq->cq_lock);
 
 	if (context) {
 		struct bnxt_re_cq_resp resp;
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index c15335dc8f614..60f2fb7e7dbfe 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -1970,6 +1970,7 @@ int bnxt_qplib_create_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq)
 	INIT_LIST_HEAD(&cq->sqf_head);
 	INIT_LIST_HEAD(&cq->rqf_head);
 	spin_lock_init(&cq->compl_lock);
+	spin_lock_init(&cq->flush_lock);
 
 	bnxt_qplib_arm_cq_enable(cq);
 	return 0;
-- 
2.20.1