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| author | Grant Likely <grant.likely@secretlab.ca> | 2009-03-31 20:17:03 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-04-02 00:57:01 -0700 |
| commit | 9404c82b5ea3237f43732d8afd4d1c0dc8f0f3ed (patch) | |
| tree | bbaa72bad1b4e702004f0b091be2e4d43b69a71e /drivers/net/fec_mpc52xx.c | |
| parent | d360009c100766c6f14ea349e8f984a3ad17e140 (diff) | |
| download | lwn-9404c82b5ea3237f43732d8afd4d1c0dc8f0f3ed.tar.gz lwn-9404c82b5ea3237f43732d8afd4d1c0dc8f0f3ed.zip | |
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>
Diffstat (limited to 'drivers/net/fec_mpc52xx.c')
| -rw-r--r-- | drivers/net/fec_mpc52xx.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/net/fec_mpc52xx.c b/drivers/net/fec_mpc52xx.c index a67f29017a4e..2d0a198882ab 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 = { |