net: hns3: Add repeat address checking for setting mac address

Add checking for new mac address. It doesn't need to config
the mac vlan table if it's already in use.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 0a6876a..fe54564 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -1132,6 +1132,12 @@ static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
        if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
                return -EADDRNOTAVAIL;
 
+       if (ether_addr_equal(netdev->dev_addr, mac_addr->sa_data)) {
+               netdev_info(netdev, "already using mac address %pM\n",
+                           mac_addr->sa_data);
+               return 0;
+       }
+
        ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data, false);
        if (ret) {
                netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);