linux-kernel - [PATCH net-next V1 1/2] net: phy: mxl-gpy: Change gpy_update

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Date:   Wed, 26 Oct 2022 11:29:17 +0530
From:   Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
To:     <netdev@...r.kernel.org>
CC:     <davem@...emloft.net>, <kuba@...nel.org>,
        <linux-kernel@...r.kernel.org>, <lxu@...linear.com>,
        <hkallweit1@...il.com>, <pabeni@...hat.com>, <edumazet@...gle.com>,
        <linux@...linux.org.uk>, <UNGLinuxDriver@...rochip.com>,
        <andrew@...n.ch>, <Ian.Saturley@...rochip.com>
Subject: [PATCH net-next V1 1/2] net: phy: mxl-gpy: Change gpy_update_interface() function return type

gpy_update_interface() is called from gpy_read_status() which does
return error codes. gpy_read_status() would benefit from returning
-EINVAL, etc.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
---
 drivers/net/phy/mxl-gpy.c | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/drivers/net/phy/mxl-gpy.c b/drivers/net/phy/mxl-gpy.c
index 24bae27eedef..1383af3c2677 100644
--- a/drivers/net/phy/mxl-gpy.c
+++ b/drivers/net/phy/mxl-gpy.c
@@ -370,14 +370,14 @@ static int gpy_config_aneg(struct phy_device *phydev)
 			      VSPEC1_SGMII_CTRL_ANRS, VSPEC1_SGMII_CTRL_ANRS);
 }
 
-static void gpy_update_interface(struct phy_device *phydev)
+static int gpy_update_interface(struct phy_device *phydev)
 {
 	int ret;
 
 	/* Interface mode is fixed for USXGMII and integrated PHY */
 	if (phydev->interface == PHY_INTERFACE_MODE_USXGMII ||
 	    phydev->interface == PHY_INTERFACE_MODE_INTERNAL)
-		return;
+		return -EINVAL;
 
 	/* Automatically switch SERDES interface between SGMII and 2500-BaseX
 	 * according to speed. Disable ANEG in 2500-BaseX mode.
@@ -387,10 +387,12 @@ static void gpy_update_interface(struct phy_device *phydev)
 		phydev->interface = PHY_INTERFACE_MODE_2500BASEX;
 		ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_SGMII_CTRL,
 				     VSPEC1_SGMII_CTRL_ANEN, 0);
-		if (ret < 0)
+		if (ret < 0) {
 			phydev_err(phydev,
 				   "Error: Disable of SGMII ANEG failed: %d\n",
 				   ret);
+			return ret;
+		}
 		break;
 	case SPEED_1000:
 	case SPEED_100:
@@ -404,15 +406,22 @@ static void gpy_update_interface(struct phy_device *phydev)
 		ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_SGMII_CTRL,
 				     VSPEC1_SGMII_ANEN_ANRS,
 				     VSPEC1_SGMII_ANEN_ANRS);
-		if (ret < 0)
+		if (ret < 0) {
 			phydev_err(phydev,
 				   "Error: Enable of SGMII ANEG failed: %d\n",
 				   ret);
+			return ret;
+		}
 		break;
 	}
 
-	if (phydev->speed == SPEED_2500 || phydev->speed == SPEED_1000)
-		genphy_read_master_slave(phydev);
+	if (phydev->speed == SPEED_2500 || phydev->speed == SPEED_1000) {
+		ret = genphy_read_master_slave(phydev);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
 }
 
 static int gpy_read_status(struct phy_device *phydev)
@@ -463,8 +472,11 @@ static int gpy_read_status(struct phy_device *phydev)
 		break;
 	}
 
-	if (phydev->link)
-		gpy_update_interface(phydev);
+	if (phydev->link) {
+		ret = gpy_update_interface(phydev);
+		if (ret < 0)
+			return ret;
+	}
 
 	return 0;
 }
-- 
2.25.1