pasemi_mac: ethtool get settings fix

Not all pasemi mac interfaces can have a phy attached.
For example, XAUI has no phy and phydev is NULL for it.
In this case ethtool get settings causes kernel crash.
Fix it by returning -EOPNOTSUPP if there's no PHY attached.

Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/pasemi_mac_ethtool.c b/drivers/net/pasemi_mac_ethtool.c
index 064a4fe1dd90..28a86224879d 100644
--- a/drivers/net/pasemi_mac_ethtool.c
+++ b/drivers/net/pasemi_mac_ethtool.c
@@ -71,6 +71,9 @@ pasemi_mac_ethtool_get_settings(struct net_device *netdev,
         struct pasemi_mac *mac = netdev_priv(netdev);
         struct phy_device *phydev = mac->phydev;
 
+        if (!phydev)
+                return -EOPNOTSUPP;
+
         return phy_ethtool_gset(phydev, cmd);
 }