linux-kernel - [PATCH net-next 01/12] net: hns3: check 1000M half for hns3_ethtool_ops.set_link

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Message-ID: <1554260881-44948-2-git-send-email-tanhuazhong@huawei.com>
Date:   Wed, 3 Apr 2019 11:07:50 +0800
From:   Huazhong Tan <tanhuazhong@...wei.com>
To:     <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <linuxarm@...wei.com>, Peng Li <lipeng321@...wei.com>,
        Huazhong Tan <tanhuazhong@...wei.com>
Subject: [PATCH net-next 01/12] net: hns3: check 1000M half for hns3_ethtool_ops.set_link_ksettings

From: Peng Li <lipeng321@...wei.com>

Hip08 SOC does not support 1000M half, this patch adds 1000M half
check for hns3_ethtool_ops.set_link_ksettings, so the user can not
set 1000M half by ethtool.

Signed-off-by: Peng Li <lipeng321@...wei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index 359d473..0c05807 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -648,6 +648,10 @@ static int hns3_get_link_ksettings(struct net_device *netdev,
 static int hns3_set_link_ksettings(struct net_device *netdev,
 				   const struct ethtool_link_ksettings *cmd)
 {
+	/* Chip don't support this mode. */
+	if (cmd->base.speed == SPEED_1000 && cmd->base.duplex == DUPLEX_HALF)
+		return -EINVAL;
+
 	/* Only support ksettings_set for netdev with phy attached for now */
 	if (netdev->phydev)
 		return phy_ethtool_ksettings_set(netdev->phydev, cmd);
-- 
2.7.4