net: dsa: read mac address from DT for slave device

Before creating a slave netdevice, get the mac address from DTS and
apply in case it is valid.

Signed-off-by: Xiaofei Shen <xiaofeis@codeaurora.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/dsa.h b/include/net/dsa.h
index ae480bb..0cfc2f8 100644 (file)
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -140,6 +140,7 @@ struct dsa_port {
        unsigned int            index;
        const char              *name;
        const struct dsa_port   *cpu_dp;
+       const char              *mac;
        struct device_node      *dn;
        unsigned int            ageing_time;
        u8                      stp_state;

diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index fe0a619..0e1cce4 100644 (file)
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -266,6 +266,7 @@ static int dsa_port_setup(struct dsa_port *dp)
                return 0;
 
        memset(&dp->devlink_port, 0, sizeof(dp->devlink_port));
+       dp->mac = of_get_mac_address(dp->dn);
 
        switch (dp->type) {
        case DSA_PORT_TYPE_CPU:

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 80be8e8..f835259 100644 (file)
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1393,7 +1393,10 @@ int dsa_slave_create(struct dsa_port *port)
                                NETIF_F_HW_VLAN_CTAG_FILTER;
        slave_dev->hw_features |= NETIF_F_HW_TC;
        slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
-       eth_hw_addr_inherit(slave_dev, master);
+       if (port->mac && is_valid_ether_addr(port->mac))
+               ether_addr_copy(slave_dev->dev_addr, port->mac);
+       else
+               eth_hw_addr_inherit(slave_dev, master);
        slave_dev->priv_flags |= IFF_NO_QUEUE;
        slave_dev->netdev_ops = &dsa_slave_netdev_ops;
        slave_dev->min_mtu = 0;