[NET]: Call uninit if necessary in register_netdevice

This patch makes register_netdevice call dev->uninit if the regsitration
fails after dev->init has completed successfully.  Very few drivers use
the init/uninit calls but at least one (drivers/net/wan/sealevel.c) may
leak without this change.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 3 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 8c9518e946fa..7bfea5e9030e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3337,7 +3337,7 @@ int register_netdevice(struct net_device *dev)
 
         if (!dev_valid_name(dev->name)) {
                 ret = -EINVAL;
-                goto out;
+                goto err_uninit;
         }
 
         dev->ifindex = dev_new_index();
@@ -3351,7 +3351,7 @@ int register_netdevice(struct net_device *dev)
                         = hlist_entry(p, struct net_device, name_hlist);
                 if (!strncmp(d->name, dev->name, IFNAMSIZ)) {
                         ret = -EEXIST;
-                        goto out;
+                        goto err_uninit;
                 }
         }
 
@@ -3411,7 +3411,7 @@ int register_netdevice(struct net_device *dev)
 
         ret = netdev_register_sysfs(dev);
         if (ret)
-                goto out;
+                goto err_uninit;
         dev->reg_state = NETREG_REGISTERED;
 
         /*
@@ -3436,6 +3436,11 @@ int register_netdevice(struct net_device *dev)
 
 out:
         return ret;
+
+err_uninit:
+        if (dev->uninit)
+                dev->uninit(dev);
+        goto out;
 }
 
 /**