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    Subject[PATCH 4.15 071/168] net: hns3: fix for changing MTU
    Date
    4.15-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Fuyun Liang <liangfuyun1@huawei.com>


    [ Upstream commit 5bad95a1e55f4d5bb41e130db859d57eaf1b1549 ]

    when changing MTU, The new MTU must need to be set to netdevice.

    Fixes: a8e8b7ff3517 ("net: hns3: Add support to change MTU in HNS3 hardware")
    Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
    Signed-off-by: Peng Li <lipeng321@huawei.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
    +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
    @@ -1324,6 +1324,8 @@ static int hns3_nic_change_mtu(struct ne
    return ret;
    }

    + netdev->mtu = new_mtu;
    +
    /* if the netdev was running earlier, bring it up again */
    if (if_running && hns3_nic_net_open(netdev))
    ret = -EINVAL;

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