[ Upstream commit 9c6ccc035c209dda07685e8dba829a203ba17499 ]

When flush cqe with srq, the driver disable to update the rq head pointer
into the hardware.
Signed-off-by: NLijun Ou <oulijun@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>