linux-kernel - [PATCH v4 04/10] net: davinci: support of_get_mac_address new ERR

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Date:   Fri,  3 May 2019 16:27:09 +0200
From:   Petr Štetiar <ynezz@...e.cz>
To:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        Grygorii Strashko <grygorii.strashko@...com>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Frank Rowand <frowand.list@...il.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Petr Štetiar <ynezz@...e.cz>,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 04/10] net: davinci: support of_get_mac_address new ERR_PTR error

There was NVMEM support added directly to of_get_mac_address, and it uses
nvmem_get_mac_address under the hood, so we can remove it. As
of_get_mac_address can now return ERR_PTR encoded error values, adjust to
that as well.

Signed-off-by: Petr Štetiar <ynezz@...e.cz>
---

 Changes since v2:

  * ERR_PTR handling

 Changes since v3:

  * IS_ERR_OR_NULL -> IS_ERR

 drivers/net/ethernet/ti/davinci_emac.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index 57450b1..c117a8f 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -1714,7 +1714,7 @@ static struct net_device_stats *emac_dev_getnetstats(struct net_device *ndev)
 
 	if (!is_valid_ether_addr(pdata->mac_addr)) {
 		mac_addr = of_get_mac_address(np);
-		if (mac_addr)
+		if (!IS_ERR(mac_addr))
 			ether_addr_copy(pdata->mac_addr, mac_addr);
 	}
 
@@ -1912,15 +1912,11 @@ static int davinci_emac_probe(struct platform_device *pdev)
 		ether_addr_copy(ndev->dev_addr, priv->mac_addr);
 
 	if (!is_valid_ether_addr(priv->mac_addr)) {
-		/* Try nvmem if MAC wasn't passed over pdata or DT. */
-		rc = nvmem_get_mac_address(&pdev->dev, priv->mac_addr);
-		if (rc) {
-			/* Use random MAC if still none obtained. */
-			eth_hw_addr_random(ndev);
-			memcpy(priv->mac_addr, ndev->dev_addr, ndev->addr_len);
-			dev_warn(&pdev->dev, "using random MAC addr: %pM\n",
-				 priv->mac_addr);
-		}
+		/* Use random MAC if still none obtained. */
+		eth_hw_addr_random(ndev);
+		memcpy(priv->mac_addr, ndev->dev_addr, ndev->addr_len);
+		dev_warn(&pdev->dev, "using random MAC addr: %pM\n",
+			 priv->mac_addr);
 	}
 
 	ndev->netdev_ops = &emac_netdev_ops;
-- 
1.9.1