net: hns3: add barrier in vf mailbox reply process

net: hns3: add barrier in vf mailbox reply process

[ Upstream commit ac92c0a9a0603fb448e60f38e63302e4eebb8035 ]

In hclgevf_mbx_handler() and hclgevf_get_mbx_resp() functions,
there is a typical store-store and load-load scenario between
received_resp and additional_info. This patch adds barrier
to fix the problem.

Fixes: 4671042f1ef0 ("net: hns3: add match_id to check mailbox response from PF to VF")
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>