netdev - Re: [PATCH net-next 03/12] ethernet: alteon: use eth_hw_addr

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Date:   Tue, 19 Oct 2021 09:49:20 +0200
From:   jes@...ined-monkey.org
To:     davem@...emloft.net, Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCH net-next 03/12] ethernet: alteon: use eth_hw_addr_set()

Acked-By: Jes Sorensen <jes@...ined-monkey.org>

Sorry for top posting, mobile email clients suck.

Jes

Sent from MailDroid

-----Original Message-----
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>, jes@...ined-monkey.org, linux-acenic@...site.dk
Sent: Sat, 16 Oct 2021 0:17
Subject: [PATCH net-next 03/12] ethernet: alteon: 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.

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

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: jes@...ined-monkey.org
CC: linux-acenic@...site.dk
---
 drivers/net/ethernet/alteon/acenic.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/alteon/acenic.c b/drivers/net/ethernet/alteon/acenic.c
index eeb86bd851f9..732da15a3827 100644
--- a/drivers/net/ethernet/alteon/acenic.c
+++ b/drivers/net/ethernet/alteon/acenic.c
@@ -869,6 +869,7 @@ static int ace_init(struct net_device *dev)
 	int board_idx, ecode = 0;
 	short i;
 	unsigned char cache_size;
+	u8 addr[ETH_ALEN];
 
 	ap = netdev_priv(dev);
 	regs = ap->regs;
@@ -988,12 +989,13 @@ static int ace_init(struct net_device *dev)
 	writel(mac1, &regs->MacAddrHi);
 	writel(mac2, &regs->MacAddrLo);
 
-	dev->dev_addr[0] = (mac1 >> 8) & 0xff;
-	dev->dev_addr[1] = mac1 & 0xff;
-	dev->dev_addr[2] = (mac2 >> 24) & 0xff;
-	dev->dev_addr[3] = (mac2 >> 16) & 0xff;
-	dev->dev_addr[4] = (mac2 >> 8) & 0xff;
-	dev->dev_addr[5] = mac2 & 0xff;
+	addr[0] = (mac1 >> 8) & 0xff;
+	addr[1] = mac1 & 0xff;
+	addr[2] = (mac2 >> 24) & 0xff;
+	addr[3] = (mac2 >> 16) & 0xff;
+	addr[4] = (mac2 >> 8) & 0xff;
+	addr[5] = mac2 & 0xff;
+	eth_hw_addr_set(dev, addr);
 
 	printk("MAC: %pM\n", dev->dev_addr);
 
-- 
2.31.1