From: Jakub Kicinski <kuba@kernel.org>
Date: Mon, 18 Oct 2021 07:29:32 -0700
Subject: ethernet: smsc: use eth_hw_addr_set()
Patch-mainline: v5.16-rc1
Git-commit: f15fef4c0675d4117d71ae5233e864fd3db14761
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.

Break the address up 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/smsc/smsc911x.c |   14 ++++++++------
 drivers/net/ethernet/smsc/smsc9420.c |   16 +++++++++-------
 2 files changed, 17 insertions(+), 13 deletions(-)

--- a/drivers/net/ethernet/smsc/smsc911x.c
+++ b/drivers/net/ethernet/smsc/smsc911x.c
@@ -2162,13 +2162,15 @@ static void smsc911x_read_mac_address(st
 	struct smsc911x_data *pdata = netdev_priv(dev);
 	u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
 	u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
+	u8 addr[ETH_ALEN];
 
-	dev->dev_addr[0] = (u8)(mac_low32);
-	dev->dev_addr[1] = (u8)(mac_low32 >> 8);
-	dev->dev_addr[2] = (u8)(mac_low32 >> 16);
-	dev->dev_addr[3] = (u8)(mac_low32 >> 24);
-	dev->dev_addr[4] = (u8)(mac_high16);
-	dev->dev_addr[5] = (u8)(mac_high16 >> 8);
+	addr[0] = (u8)(mac_low32);
+	addr[1] = (u8)(mac_low32 >> 8);
+	addr[2] = (u8)(mac_low32 >> 16);
+	addr[3] = (u8)(mac_low32 >> 24);
+	addr[4] = (u8)(mac_high16);
+	addr[5] = (u8)(mac_high16 >> 8);
+	eth_hw_addr_set(dev, addr);
 }
 
 /* Initializing private device structures, only called from probe */
--- a/drivers/net/ethernet/smsc/smsc9420.c
+++ b/drivers/net/ethernet/smsc/smsc9420.c
@@ -416,6 +416,7 @@ static void smsc9420_set_mac_address(str
 static void smsc9420_check_mac_address(struct net_device *dev)
 {
 	struct smsc9420_pdata *pd = netdev_priv(dev);
+	u8 addr[ETH_ALEN];
 
 	/* Check if mac address has been specified when bringing interface up */
 	if (is_valid_ether_addr(dev->dev_addr)) {
@@ -427,15 +428,16 @@ static void smsc9420_check_mac_address(s
 		 * it will already have been set */
 		u32 mac_high16 = smsc9420_reg_read(pd, ADDRH);
 		u32 mac_low32 = smsc9420_reg_read(pd, ADDRL);
-		dev->dev_addr[0] = (u8)(mac_low32);
-		dev->dev_addr[1] = (u8)(mac_low32 >> 8);
-		dev->dev_addr[2] = (u8)(mac_low32 >> 16);
-		dev->dev_addr[3] = (u8)(mac_low32 >> 24);
-		dev->dev_addr[4] = (u8)(mac_high16);
-		dev->dev_addr[5] = (u8)(mac_high16 >> 8);
+		addr[0] = (u8)(mac_low32);
+		addr[1] = (u8)(mac_low32 >> 8);
+		addr[2] = (u8)(mac_low32 >> 16);
+		addr[3] = (u8)(mac_low32 >> 24);
+		addr[4] = (u8)(mac_high16);
+		addr[5] = (u8)(mac_high16 >> 8);
 
-		if (is_valid_ether_addr(dev->dev_addr)) {
+		if (is_valid_ether_addr(addr)) {
 			/* eeprom values are valid  so use them */
+			eth_hw_addr_set(dev, addr);
 			netif_dbg(pd, probe, pd->dev,
 				  "Mac Address is read from EEPROM\n");
 		} else {