netdev - [PATCH net-next 12/12] ethernet: ixgb: use eth_hw_addr

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Date:   Fri, 15 Oct 2021 15:16:52 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com
Subject: [PATCH net-next 12/12] ethernet: ixgb: 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 got through appropriate helpers.

Read the address into an array on the stack, then call
eth_hw_addr_set(). ixgb_get_ee_mac_addr() is used with
a non-nevdev->dev_addr pointer so we can't deal with the problem
inside it.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: jesse.brandeburg@...el.com
CC: anthony.l.nguyen@...el.com
---
 drivers/net/ethernet/intel/ixgb/ixgb_main.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_main.c b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
index 5e1e2f0db82a..99d481904ce6 100644
--- a/drivers/net/ethernet/intel/ixgb/ixgb_main.c
+++ b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
@@ -362,6 +362,7 @@ ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct ixgb_adapter *adapter;
 	static int cards_found = 0;
 	int pci_using_dac;
+	u8 addr[ETH_ALEN];
 	int i;
 	int err;
 
@@ -461,7 +462,8 @@ ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_eeprom;
 	}
 
-	ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
+	ixgb_get_ee_mac_addr(&adapter->hw, addr);
+	eth_hw_addr_set(netdev, addr);
 
 	if (!is_valid_ether_addr(netdev->dev_addr)) {
 		netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
@@ -2227,6 +2229,7 @@ static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
 {
 	struct net_device *netdev = pci_get_drvdata(pdev);
 	struct ixgb_adapter *adapter = netdev_priv(netdev);
+	u8 addr[ETH_ALEN];
 
 	if (pci_enable_device(pdev)) {
 		netif_err(adapter, probe, adapter->netdev,
@@ -2250,7 +2253,8 @@ static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
 			  "After reset, the EEPROM checksum is not valid\n");
 		return PCI_ERS_RESULT_DISCONNECT;
 	}
-	ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
+	ixgb_get_ee_mac_addr(&adapter->hw, addr);
+	eth_hw_addr_set(netdev, addr);
 	memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
 
 	if (!is_valid_ether_addr(netdev->perm_addr)) {
-- 
2.31.1