RDMA/bnxt_re: Add missing spin lock initialization

mainline inclusion
from mainline-4.20-rc1
commit 5a23e0b1dd51fe0efae666b03fdb15e1301f437a
category: bugfix
bugzilla: 6717
CVE: NA

-----------------------------

Since any page fault may be interrupted by a MMU invalidation and implicit
Add the missing initalization of the cq_lock and qplib.flush_lock.

Fixes: 942c9b6c ("RDMA/bnxt_re: Avoid Hard lockup during error CQE processing")
Signed-off-by: NSelvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NJing Xiangfeng <jingxiangfeng@huawei.com>
Reviewed-by: NHanjun Guo <guohanjun@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

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;

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;