4.9-stable review patch. If anyone has any objections, please let me know.
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From: Peng Li lipeng321@huawei.com
[ Upstream commit 455c4401fe7a538facaffb35b906ce19f1ece474 ]
If there are packets in hardware when changing the speed or duplex, it may cause hardware hang up.
This patch adds netif_carrier_off before change speed and duplex in ethtool_ops.set_link_ksettings, and adds netif_carrier_on after complete the change.
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/hns/hns_ethtool.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c @@ -243,7 +243,9 @@ static int hns_nic_set_link_ksettings(st }
if (h->dev->ops->adjust_link) { + netif_carrier_off(net_dev); h->dev->ops->adjust_link(h, (int)speed, cmd->base.duplex); + netif_carrier_on(net_dev); return 0; }