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Date: Mon, 9 Nov 2020 13:56:04 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Xiaofei Shen <xiaofeis@...eaurora.org>, Vinod Koul <vkoul@...nel.org>, "David S. Miller" <davem@...emloft.net>, Pali Rohár <pali@...nel.org> Subject: [PATCH 4.19 70/71] net: dsa: read mac address from DT for slave device From: Xiaofei Shen <xiaofeis@...eaurora.org> commit a2c7023f7075ca9b80f944d3f20f60e6574538e2 upstream. Before creating a slave netdevice, get the mac address from DTS and apply in case it is valid. Signed-off-by: Xiaofei Shen <xiaofeis@...eaurora.org> Signed-off-by: Vinod Koul <vkoul@...nel.org> Signed-off-by: David S. Miller <davem@...emloft.net> Cc: Pali Rohár <pali@...nel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- include/net/dsa.h | 1 + net/dsa/dsa2.c | 1 + net/dsa/slave.c | 5 ++++- 3 files changed, 6 insertions(+), 1 deletion(-) --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -196,6 +196,7 @@ 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; --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -261,6 +261,7 @@ static int dsa_port_setup(struct dsa_por int err = 0; memset(&dp->devlink_port, 0, sizeof(dp->devlink_port)); + dp->mac = of_get_mac_address(dp->dn); if (dp->type != DSA_PORT_TYPE_UNUSED) err = devlink_port_register(ds->devlink, &dp->devlink_port, --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -1313,7 +1313,10 @@ int dsa_slave_create(struct dsa_port *po slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 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->switchdev_ops = &dsa_slave_switchdev_ops;
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