1 files changed, 34 insertions, 27 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 72b0d26fd46d..f1129706ce7b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2267,12 +2267,6 @@ int netif_receive_skb(struct sk_buff *skb)
 
         rcu_read_lock();
 
-        /* Don't receive packets in an exiting network namespace */
-        if (!net_alive(dev_net(skb->dev))) {
-                kfree_skb(skb);
-                goto out;
-        }
-
 #ifdef CONFIG_NET_CLS_ACT
         if (skb->tc_verd & TC_NCLS) {
                 skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
@@ -4288,6 +4282,39 @@ unsigned long netdev_fix_features(unsigned long features, const char *name)
 }
 EXPORT_SYMBOL(netdev_fix_features);
 
+/* Some devices need to (re-)set their netdev_ops inside
+ * ->init() or similar.  If that happens, we have to setup
+ * the compat pointers again.
+ */
+void netdev_resync_ops(struct net_device *dev)
+{
+#ifdef CONFIG_COMPAT_NET_DEV_OPS
+        const struct net_device_ops *ops = dev->netdev_ops;
+
+        dev->init = ops->ndo_init;
+        dev->uninit = ops->ndo_uninit;
+        dev->open = ops->ndo_open;
+        dev->change_rx_flags = ops->ndo_change_rx_flags;
+        dev->set_rx_mode = ops->ndo_set_rx_mode;
+        dev->set_multicast_list = ops->ndo_set_multicast_list;
+        dev->set_mac_address = ops->ndo_set_mac_address;
+        dev->validate_addr = ops->ndo_validate_addr;
+        dev->do_ioctl = ops->ndo_do_ioctl;
+        dev->set_config = ops->ndo_set_config;
+        dev->change_mtu = ops->ndo_change_mtu;
+        dev->neigh_setup = ops->ndo_neigh_setup;
+        dev->tx_timeout = ops->ndo_tx_timeout;
+        dev->get_stats = ops->ndo_get_stats;
+        dev->vlan_rx_register = ops->ndo_vlan_rx_register;
+        dev->vlan_rx_add_vid = ops->ndo_vlan_rx_add_vid;
+        dev->vlan_rx_kill_vid = ops->ndo_vlan_rx_kill_vid;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+        dev->poll_controller = ops->ndo_poll_controller;
+#endif
+#endif
+}
+EXPORT_SYMBOL(netdev_resync_ops);
+
 /**
  *      register_netdevice      - register a network device
  *      @dev: device to register
@@ -4332,27 +4359,7 @@ int register_netdevice(struct net_device *dev)
          * This is temporary until all network devices are converted.
          */
         if (dev->netdev_ops) {
-                const struct net_device_ops *ops = dev->netdev_ops;
-
-                dev->init = ops->ndo_init;
-                dev->uninit = ops->ndo_uninit;
-                dev->open = ops->ndo_open;
-                dev->change_rx_flags = ops->ndo_change_rx_flags;
-                dev->set_rx_mode = ops->ndo_set_rx_mode;
-                dev->set_multicast_list = ops->ndo_set_multicast_list;
-                dev->set_mac_address = ops->ndo_set_mac_address;
-                dev->validate_addr = ops->ndo_validate_addr;
-                dev->do_ioctl = ops->ndo_do_ioctl;
-                dev->set_config = ops->ndo_set_config;
-                dev->change_mtu = ops->ndo_change_mtu;
-                dev->tx_timeout = ops->ndo_tx_timeout;
-                dev->get_stats = ops->ndo_get_stats;
-                dev->vlan_rx_register = ops->ndo_vlan_rx_register;
-                dev->vlan_rx_add_vid = ops->ndo_vlan_rx_add_vid;
-                dev->vlan_rx_kill_vid = ops->ndo_vlan_rx_kill_vid;
-#ifdef CONFIG_NET_POLL_CONTROLLER
-                dev->poll_controller = ops->ndo_poll_controller;
-#endif
+                netdev_resync_ops(dev);
         } else {
                 char drivername[64];
                 pr_info("%s (%s): not using net_device_ops yet\n",