Re: [PATCH net] net: hns3: add rmb() for rx description

[tanhuazhong]

On 2019/3/4 13:15, David Miller wrote:

From: Huazhong Tan <tanhuazh...@huawei.com>
Date: Sat, 2 Mar 2019 16:49:30 +0800

From: Jian Shen <shenjia...@huawei.com>

HW can not guarantee complete write desc->rx.size, even though
HNS3_RXD_VLD_B has been set. Driver needs to add rmb() instruction
to make sure desc->rx.size is always valid.

Fixes: e55970950556 ("net: hns3: Add handling of GRO Pkts not fully RX'ed in NAPI 
poll")
Signed-off-by: Jian Shen <shenjia...@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazh...@huawei.com>

dma_rmb() is more appropriate here and more efficient.

Thanks, will send V2  to fix it.

.