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Date:   Sun, 03 Mar 2019 21:15:18 -0800 (PST)
From:   David Miller <>
Subject: Re: [PATCH net] net: hns3: add rmb() for rx description

From: Huazhong Tan <>
Date: Sat, 2 Mar 2019 16:49:30 +0800

> From: Jian Shen <>
> 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 <>
> Signed-off-by: Huazhong Tan <>

dma_rmb() is more appropriate here and more efficient.

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