From: Jakub Kicinski <kuba@kernel.org>
Date: Tue, 19 Oct 2021 08:00:07 -0700
Subject: ethernet: stmmac: use eth_hw_addr_set()
Patch-mainline: v5.16-rc1
Git-commit: 7f9b8fe5445cc3644a42c085421b3f123d78cf6e
References: jsc#PED-1565

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 got through appropriate helpers.

Read the address into an array on the stack, then call
eth_hw_addr_set().

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2817,9 +2817,13 @@ static int stmmac_get_hw_features(struct
  */
 static void stmmac_check_ether_addr(struct stmmac_priv *priv)
 {
+	u8 addr[ETH_ALEN];
+
 	if (!is_valid_ether_addr(priv->dev->dev_addr)) {
-		stmmac_get_umac_addr(priv, priv->hw, priv->dev->dev_addr, 0);
-		if (!is_valid_ether_addr(priv->dev->dev_addr))
+		stmmac_get_umac_addr(priv, priv->hw, addr, 0);
+		if (is_valid_ether_addr(addr))
+			eth_hw_addr_set(priv->dev, addr);
+		else
 			eth_hw_addr_random(priv->dev);
 		dev_info(priv->device, "device MAC address %pM\n",
 			 priv->dev->dev_addr);