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>