[PATCH v2] fix for potential NULL pointer dereference with bare lan743x

[Sergej Bauer]

Signed-off-by: Sergej Bauer <sbauer@xxxxxxxxxxx>
---
 drivers/net/ethernet/microchip/lan743x_ethtool.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.c b/drivers/net/ethernet/microchip/lan743x_ethtool.c
index dcde496da7fb..ad38fc9e1468 100644
--- a/drivers/net/ethernet/microchip/lan743x_ethtool.c
+++ b/drivers/net/ethernet/microchip/lan743x_ethtool.c
@@ -780,7 +780,9 @@ static void lan743x_ethtool_get_wol(struct net_device *netdev,
 
 	wol->supported = 0;
 	wol->wolopts = 0;
-	phy_ethtool_get_wol(netdev->phydev, wol);
+
+	if (netdev->phydev)
+		phy_ethtool_get_wol(netdev->phydev, wol);
 
 	wol->supported |= WAKE_BCAST | WAKE_UCAST | WAKE_MCAST |
 		WAKE_MAGIC | WAKE_PHY | WAKE_ARP;
@@ -792,6 +794,7 @@ static int lan743x_ethtool_set_wol(struct net_device *netdev,
 				   struct ethtool_wolinfo *wol)
 {
 	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	int ret;
 
 	adapter->wolopts = 0;
 	if (wol->wolopts & WAKE_UCAST)
@@ -809,9 +812,12 @@ static int lan743x_ethtool_set_wol(struct net_device *netdev,
 
 	device_set_wakeup_enable(&adapter->pdev->dev, (bool)wol->wolopts);
 
-	phy_ethtool_set_wol(netdev->phydev, wol);
+	if (netdev->phydev)
+		ret = phy_ethtool_set_wol(netdev->phydev, wol);
+	else
+		ret = -EIO;
 
-	return 0;
+	return ret;
 }
 #endif /* CONFIG_PM */
 
-- 
2.20.1