linux-kernel - [PATCH v1 net-next] net: phy: mdio_bus: make mdiobus

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Message-Id: <1566870769-9967-1-git-send-email-weifeng.voon@intel.com>
Date:   Tue, 27 Aug 2019 09:52:49 +0800
From:   Voon Weifeng <weifeng.voon@...el.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jose Abreu <joabreu@...opsys.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        Voon Weifeng <weifeng.voon@...el.com>
Subject: [PATCH v1 net-next] net: phy: mdio_bus: make mdiobus_scan also cover PHY that only talks C45

From: Ong Boon Leong <boon.leong.ong@...el.com>

Make mdiobus_scan() to try harder to look for any PHY that only talks C45.

Signed-off-by: Ong Boon Leong <boon.leong.ong@...el.com>
Signed-off-by: Voon Weifeng <weifeng.voon@...el.com>

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index bd04fe762056..30dbc48b4c7e 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -525,8 +525,12 @@ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
 	int err;
 
 	phydev = get_phy_device(bus, addr, false);
-	if (IS_ERR(phydev))
-		return phydev;
+	if (IS_ERR(phydev)) {
+		/* Try C45 to ensure we don't miss PHY that only talks C45 */
+		phydev = get_phy_device(bus, addr, true);
+		if (IS_ERR(phydev))
+			return phydev;
+	}
 
 	/*
 	 * For DT, see if the auto-probed phy has a correspoding child
-- 
1.9.1