From: Gabor Juhos <juhosg@openwrt.org>
Date: Fri, 11 Dec 2009 19:32:58 +0000 (+0000)
Subject: ar71xx: fix NULL pointer dereference in the ethernet driver
X-Git-Tag: backfire_10.03~1361
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=8956009fa698e6ddf678d68cb32db4a76acfb632;p=openwrt%2Fsvn-archive%2Fopenwrt.git

ar71xx: fix NULL pointer dereference in the ethernet driver

SVN-Revision: 18755
---

diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
index 547f72edba..4233152aec 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
@@ -309,9 +309,11 @@ int ag71xx_phy_connect(struct ag71xx *ag)
 	}
 
 	/* Reset the mdio bus explicitly */
-	mutex_lock(&ag->mii_bus->mdio_lock);
-	ag->mii_bus->reset(ag->mii_bus);
-	mutex_unlock(&ag->mii_bus->mdio_lock);
+	if (ag->mii_bus->reset) {
+		mutex_lock(&ag->mii_bus->mdio_lock);
+		ag->mii_bus->reset(ag->mii_bus);
+		mutex_unlock(&ag->mii_bus->mdio_lock);
+	}
 
 	if (pdata->phy_mask)
 		return ag71xx_phy_connect_multi(ag);