netdev - [PATCH] pasemi_mac: ethtool get settings fix

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Date:	Fri, 2 Oct 2009 02:27:48 +0400
From:	Valentine Barshak <vbarshak@...mvista.com>
To:	linuxppc-dev@...abs.org
Cc:	netdev@...r.kernel.org
Subject: [PATCH] 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@...mvista.com>
---
 drivers/net/pasemi_mac_ethtool.c |    2 ++
 1 file changed, 2 insertions(+)

--- linux-2.6.21.orig/drivers/net/pasemi_mac_ethtool.c	2008-11-06 18:10:38.000000000 +0300
+++ linux-2.6.21/drivers/net/pasemi_mac_ethtool.c	2008-11-19 19:24:28.000000000 +0300
@@ -71,6 +71,8 @@ pasemi_mac_ethtool_get_settings(struct n
 	struct pasemi_mac *mac = netdev_priv(netdev);
 	struct phy_device *phydev = mac->phydev;
 
+	if (!phydev)
+		return -EOPNOTSUPP;
 	return phy_ethtool_gset(phydev, cmd);
 }
 
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