From: Grant Likely <grant.likely@secretlab.ca>
Date: Tue, 31 Mar 2009 20:17:03 +0000 (+0000)
Subject: net/fec_mpc52xx: Don't dereference phy_device if it is NULL
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=9404c82b5ea3237f43732d8afd4d1c0dc8f0f3ed;p=linux-2.6-omap-h63xx.git

net/fec_mpc52xx: Don't dereference phy_device if it is NULL

The FEC Ethernet device isn't always attached to a phy.  Be careful
not to dereference phy_device if it is NULL.  Also eliminates an
unnecessary extra function from the ioctl path.

Reported-by: Henk Stegeman <henk.stegeman@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/fec_mpc52xx.c b/drivers/net/fec_mpc52xx.c
index a67f29017a4..2d0a198882a 100644
--- a/drivers/net/fec_mpc52xx.c
+++ b/drivers/net/fec_mpc52xx.c
@@ -271,15 +271,6 @@ static void mpc52xx_fec_phy_stop(struct net_device *dev)
 	phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN);
 }
 
-static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv,
-		struct mii_ioctl_data *mii_data, int cmd)
-{
-	if (!priv->phydev)
-		return -ENOTSUPP;
-
-	return phy_mii_ioctl(priv->phydev, mii_data, cmd);
-}
-
 static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv)
 {
 	struct mpc52xx_fec __iomem *fec = priv->fec;
@@ -852,12 +843,20 @@ static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
 	struct mpc52xx_fec_priv *priv = netdev_priv(dev);
+
+	if (!priv->phydev)
+		return -ENODEV;
+
 	return phy_ethtool_gset(priv->phydev, cmd);
 }
 
 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
 	struct mpc52xx_fec_priv *priv = netdev_priv(dev);
+
+	if (!priv->phydev)
+		return -ENODEV;
+
 	return phy_ethtool_sset(priv->phydev, cmd);
 }
 
@@ -887,7 +886,10 @@ static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 {
 	struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 
-	return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd);
+	if (!priv->phydev)
+		return -ENOTSUPP;
+
+	return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
 }
 
 static const struct net_device_ops mpc52xx_fec_netdev_ops = {