linux-kernel - [PATCH 4.19 25/99] lan743x: Remove phy_read from link status change function

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Date:   Mon, 21 Jan 2019 14:48:17 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Bryan Whitehead <Bryan.Whitehead@...rochip.com>,
        Andrew Lunn <andrew@...n.ch>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.19 25/99] lan743x: Remove phy_read from link status change function

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bryan Whitehead <Bryan.Whitehead@...rochip.com>

[ Upstream commit a0071840d2040ea1b27e5a008182b09b88defc15 ]

It has been noticed that some phys do not have the registers
required by the previous implementation.

To fix this, instead of using phy_read, the required information
is extracted from the phy_device structure.

fixes: 23f0703c125b ("lan743x: Add main source files for new lan743x driver")
Signed-off-by: Bryan Whitehead <Bryan.Whitehead@...rochip.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/microchip/lan743x_main.c |   11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -962,13 +962,10 @@ static void lan743x_phy_link_status_chan
 
 		memset(&ksettings, 0, sizeof(ksettings));
 		phy_ethtool_get_link_ksettings(netdev, &ksettings);
-		local_advertisement = phy_read(phydev, MII_ADVERTISE);
-		if (local_advertisement < 0)
-			return;
-
-		remote_advertisement = phy_read(phydev, MII_LPA);
-		if (remote_advertisement < 0)
-			return;
+		local_advertisement =
+			ethtool_adv_to_mii_adv_t(phydev->advertising);
+		remote_advertisement =
+			ethtool_adv_to_mii_adv_t(phydev->lp_advertising);
 
 		lan743x_phy_update_flowcontrol(adapter,
 					       ksettings.base.duplex,