From: Jakub Kicinski <kuba@kernel.org>
Date: Fri, 22 Oct 2021 16:21:02 -0700
Subject: net: drivers: get ready for const netdev->dev_addr
Patch-mainline: v5.16-rc1
Git-commit: 8bc7823ed3bd5b87765e1b3d6f72c69624680921
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 go through appropriate helpers. We will make
netdev->dev_addr a const.

Make sure local references to netdev->dev_addr are constant.

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/macsec.c              |    2 +-
 drivers/net/macvlan.c             |    3 ++-
 drivers/net/vmxnet3/vmxnet3_drv.c |    4 ++--
 3 files changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -250,7 +250,7 @@ static bool send_sci(const struct macsec
 		(secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
 }
 
-static sci_t make_sci(u8 *addr, __be16 port)
+static sci_t make_sci(const u8 *addr, __be16 port)
 {
 	sci_t sci;
 
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -698,7 +698,8 @@ hash_del:
 	return 0;
 }
 
-static int macvlan_sync_address(struct net_device *dev, unsigned char *addr)
+static int macvlan_sync_address(struct net_device *dev,
+				const unsigned char *addr)
 {
 	struct macvlan_dev *vlan = netdev_priv(dev);
 	struct net_device *lowerdev = vlan->lowerdev;
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -46,7 +46,7 @@ MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_t
 static int enable_mq = 1;
 
 static void
-vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac);
+vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, const u8 *mac);
 
 /*
  *    Enable/Disable the given intr
@@ -2806,7 +2806,7 @@ vmxnet3_quiesce_dev(struct vmxnet3_adapt
 
 
 static void
-vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
+vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, const u8 *mac)
 {
 	u32 tmp;