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authorRoland Dreier <rolandd@cisco.com>2009-03-31 10:22:32 -0700
committerRoland Dreier <rolandd@cisco.com>2009-03-31 10:22:32 -0700
commitedb5abb1e2a84fd8802a3577d95eac84fe1405ab (patch)
treea1337e312058581acada61502ccee9ff99c28f96 /drivers/infiniband/ulp
parent5d80f8e5a9dc9c9a94d4aeaa567e219a808b8a4a (diff)
downloadop-kernel-dev-edb5abb1e2a84fd8802a3577d95eac84fe1405ab.zip
op-kernel-dev-edb5abb1e2a84fd8802a3577d95eac84fe1405ab.tar.gz
IPoIB: Avoid free_netdev() BUG when destroying a child interface
We have to release the RTNL before calling free_netdev() so that the device state has a chance to become NETREG_UNREGISTERED. Otherwise when removing a child interface, we hit the BUG() that tests the device state in free_netdev(). Reported-by: Yossi Etigin <yosefe@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/ulp')
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_vlan.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
index 5a76a55..4c57f32 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
@@ -70,12 +70,14 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
*/
if (ppriv->pkey == pkey) {
result = -ENOTUNIQ;
+ priv = NULL;
goto err;
}
list_for_each_entry(priv, &ppriv->child_intfs, list) {
if (priv->pkey == pkey) {
result = -ENOTUNIQ;
+ priv = NULL;
goto err;
}
}
@@ -96,7 +98,7 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
result = ipoib_set_dev_features(priv, ppriv->ca);
if (result)
- goto device_init_failed;
+ goto err;
priv->pkey = pkey;
@@ -109,7 +111,7 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
ipoib_warn(ppriv, "failed to initialize subinterface: "
"device %s, port %d",
ppriv->ca->name, ppriv->port);
- goto device_init_failed;
+ goto err;
}
result = register_netdevice(priv->dev);
@@ -146,19 +148,19 @@ sysfs_failed:
register_failed:
ipoib_dev_cleanup(priv->dev);
-device_init_failed:
- free_netdev(priv->dev);
-
err:
mutex_unlock(&ppriv->vlan_mutex);
rtnl_unlock();
+ if (priv)
+ free_netdev(priv->dev);
+
return result;
}
int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
{
struct ipoib_dev_priv *ppriv, *priv, *tpriv;
- int ret = -ENOENT;
+ struct net_device *dev = NULL;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
@@ -172,14 +174,17 @@ int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
unregister_netdevice(priv->dev);
ipoib_dev_cleanup(priv->dev);
list_del(&priv->list);
- free_netdev(priv->dev);
-
- ret = 0;
+ dev = priv->dev;
break;
}
}
mutex_unlock(&ppriv->vlan_mutex);
rtnl_unlock();
- return ret;
+ if (dev) {
+ free_netdev(dev);
+ return 0;
+ }
+
+ return -ENODEV;
}
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