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From:   Hongwei Zhang <hongweiz@ami.com>
To:     <linux-aspeed@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>,
        <openbmc@lists.ozlabs.org>, Jakub Kicinski <kuba@kernel.org>,
        David S Miller <davem@davemloft.net>
CC:     Hongwei Zhang <hongweiz@ami.com>, netdev <netdev@vger.kernel.org>,
        Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>
Subject: [Aspeed, v1 1/1] net: ftgmac100: Change the order of getting MAC address
Date:   Mon, 21 Dec 2020 15:51:57 -0500
Message-ID: <20201221205157.31501-2-hongweiz@ami.com>
In-Reply-To: <20201221205157.31501-1-hongweiz@ami.com>
References: <20201221205157.31501-1-hongweiz@ami.com>
MIME-Version: 1.0
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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@ami.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..9be69cbdab96 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;
-	}
-
+	/* Read from Chip if not from chip */
 	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;
+	}
+
+	/* Read from Chip if not from device tree */
+	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