netdev - [PATCH net-next] net: thunderbolt: use eth_hw_addr

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Message-Id: <20211026175547.3198242-1-kuba@kernel.org>
Date:   Tue, 26 Oct 2021 10:55:47 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        michael.jamet@...el.com, mika.westerberg@...ux.intel.com,
        YehezkelShB@...il.com
Subject: [PATCH net-next] net: thunderbolt: use eth_hw_addr_set()

Commit 406f42fa0d3c ("net-next: When a bond have a massive amount
of VLANs...") introduced a rbtree for faster Ethernet address look
up. To maintain netdev->dev_addr in this tree we need to make all
the writes to it go through appropriate helpers.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: michael.jamet@...el.com
CC: mika.westerberg@...ux.intel.com
CC: YehezkelShB@...il.com
---
 drivers/net/thunderbolt.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/thunderbolt.c b/drivers/net/thunderbolt.c
index 9a6a8353e192..ff5d0e98a088 100644
--- a/drivers/net/thunderbolt.c
+++ b/drivers/net/thunderbolt.c
@@ -1202,17 +1202,19 @@ static void tbnet_generate_mac(struct net_device *dev)
 {
 	const struct tbnet *net = netdev_priv(dev);
 	const struct tb_xdomain *xd = net->xd;
+	u8 addr[ETH_ALEN];
 	u8 phy_port;
 	u32 hash;
 
 	phy_port = tb_phy_port_from_link(TBNET_L0_PORT_NUM(xd->route));
 
 	/* Unicast and locally administered MAC */
-	dev->dev_addr[0] = phy_port << 4 | 0x02;
+	addr[0] = phy_port << 4 | 0x02;
 	hash = jhash2((u32 *)xd->local_uuid, 4, 0);
-	memcpy(dev->dev_addr + 1, &hash, sizeof(hash));
+	memcpy(addr + 1, &hash, sizeof(hash));
 	hash = jhash2((u32 *)xd->local_uuid, 4, hash);
-	dev->dev_addr[5] = hash & 0xff;
+	addr[5] = hash & 0xff;
+	eth_hw_addr_set(dev, addr);
 }
 
 static int tbnet_probe(struct tb_service *svc, const struct tb_service_id *id)
-- 
2.31.1