linux-kernel - [PATCH net-next] net: macb: implement live mac addr change

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Message-Id: <20221104204837.614459-1-roman.gushchin@linux.dev>
Date:   Fri,  4 Nov 2022 13:48:37 -0700
From:   Roman Gushchin <roman.gushchin@...ux.dev>
To:     netdev@...r.kernel.org,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
        Roman Gushchin <roman.gushchin@...ux.dev>
Subject: [PATCH net-next] net: macb: implement live mac addr change

Implement live mac addr change for the macb ethernet driver.

Signed-off-by: Roman Gushchin <roman.gushchin@...ux.dev>
---
 drivers/net/ethernet/cadence/macb_main.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 4f63f1ba3161..991d5041c836 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -2947,6 +2947,18 @@ static int macb_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
+static int macb_set_mac_addr(struct net_device *dev, void *addr)
+{
+	int err;
+
+	err = eth_mac_addr(dev, addr);
+	if (err < 0)
+		return err;
+
+	macb_set_hwaddr(netdev_priv(dev));
+	return 0;
+}
+
 static void gem_update_stats(struct macb *bp)
 {
 	struct macb_queue *queue;
@@ -3786,7 +3798,7 @@ static const struct net_device_ops macb_netdev_ops = {
 	.ndo_eth_ioctl		= macb_ioctl,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_change_mtu		= macb_change_mtu,
-	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_set_mac_address	= macb_set_mac_addr,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= macb_poll_controller,
 #endif
@@ -4049,6 +4061,8 @@ static int macb_init(struct platform_device *pdev)
 		dev->ethtool_ops = &macb_ethtool_ops;
 	}
 
+	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
+
 	/* Set features */
 	dev->hw_features = NETIF_F_SG;
 
-- 
2.37.3