netdev - [PATCH net-next] net: phy: read MII_CTRL1000 in genphy_read

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Message-ID: <84cbdf69-70b4-3dd0-c34d-7db0a4f69653@gmail.com>
Date:   Thu, 15 Aug 2019 13:15:19 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next] net: phy: read MII_CTRL1000 in genphy_read_status
 only if needed

Value of MII_CTRL1000 is needed only if LPA_1000MSFAIL is set.
Therefore move reading this register.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/phy/phy_device.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 54f80af31..4f4ddc05c 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1794,7 +1794,7 @@ EXPORT_SYMBOL(genphy_update_link);
  */
 int genphy_read_status(struct phy_device *phydev)
 {
-	int adv, lpa, lpagb, err, old_link = phydev->link;
+	int lpa, lpagb, err, old_link = phydev->link;
 
 	/* Update the link, but return if there was an error */
 	err = genphy_update_link(phydev);
@@ -1816,11 +1816,12 @@ int genphy_read_status(struct phy_device *phydev)
 			if (lpagb < 0)
 				return lpagb;
 
-			adv = phy_read(phydev, MII_CTRL1000);
-			if (adv < 0)
-				return adv;
-
 			if (lpagb & LPA_1000MSFAIL) {
+				int adv = phy_read(phydev, MII_CTRL1000);
+
+				if (adv < 0)
+					return adv;
+
 				if (adv & CTL1000_ENABLE_MASTER)
 					phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
 				else
-- 
2.22.0