netdev - [Aspeed, v2 1/2] net: ftgmac100: Change the order of getting MAC address

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20201222201437.5588-2-hongweiz@ami.com>
Date:   Tue, 22 Dec 2020 15:14:36 -0500
From:   Hongwei Zhang <hongweiz@....com>
To:     <linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
        <openbmc@...ts.ozlabs.org>, Jakub Kicinski <kuba@...nel.org>,
        David S Miller <davem@...emloft.net>,
        Heiner Kallweit <hkallweit1@...il.com>
CC:     Hongwei Zhang <hongweiz@....com>, netdev <netdev@...r.kernel.org>,
        Joel Stanley <joel@....id.au>, Andrew Jeffery <andrew@...id.au>
Subject: [Aspeed, v2 1/2] net: ftgmac100: Change the order of getting MAC address

Change the order of reading MAC address, try to read it from MAC chip
first, if it's not availabe, then try to read it from device tree.

Fixes: 35c54922dc97 ("ARM: dts: tacoma: Add reserved memory for ramoops")
Signed-off-by: Hongwei Zhang <hongweiz@....com>
---
 drivers/net/ethernet/faraday/ftgmac100.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
index 65cd25372020..713e9325bef8 100644
--- a/drivers/net/ethernet/faraday/ftgmac100.c
+++ b/drivers/net/ethernet/faraday/ftgmac100.c
@@ -184,14 +184,7 @@ static void ftgmac100_initial_mac(struct ftgmac100 *priv)
 	unsigned int l;
 	void *addr;
 
-	addr = device_get_mac_address(priv->dev, mac, ETH_ALEN);
-	if (addr) {
-		ether_addr_copy(priv->netdev->dev_addr, mac);
-		dev_info(priv->dev, "Read MAC address %pM from device tree\n",
-			 mac);
-		return;
-	}
-
+	/* Try to read MAC from chip first */
 	m = ioread32(priv->base + FTGMAC100_OFFSET_MAC_MADR);
 	l = ioread32(priv->base + FTGMAC100_OFFSET_MAC_LADR);
 
@@ -205,7 +198,18 @@ static void ftgmac100_initial_mac(struct ftgmac100 *priv)
 	if (is_valid_ether_addr(mac)) {
 		ether_addr_copy(priv->netdev->dev_addr, mac);
 		dev_info(priv->dev, "Read MAC address %pM from chip\n", mac);
-	} else {
+		return;
+	}
+
+	/* Get MAC from device tree if it cannot be read from the chip */
+	addr = device_get_mac_address(priv->dev, mac, ETH_ALEN);
+	if (addr) {
+		ether_addr_copy(priv->netdev->dev_addr, mac);
+		dev_info(priv->dev, "Read MAC address %pM from device tree\n",
+				mac);
+		return;
+	}
+	else {
 		eth_hw_addr_random(priv->netdev);
 		dev_info(priv->dev, "Generated random MAC address %pM\n",
 			 priv->netdev->dev_addr);
-- 
2.17.1