Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 45 insertions, 54 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 3bad1afc89fa..2dce673a039b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -193,7 +193,7 @@ static inline struct hlist_head *dev_index_hash(int ifindex)
  *      Our notifier list
  */
 
-static BLOCKING_NOTIFIER_HEAD(netdev_chain);
+static RAW_NOTIFIER_HEAD(netdev_chain);
 
 /*
  *      Device drivers call our routines to queue packets here. We empty the
@@ -736,7 +736,7 @@ int dev_change_name(struct net_device *dev, char *newname)
         if (!err) {
                 hlist_del(&dev->name_hlist);
                 hlist_add_head(&dev->name_hlist, dev_name_hash(dev->name));
-                blocking_notifier_call_chain(&netdev_chain,
+                raw_notifier_call_chain(&netdev_chain,
                                 NETDEV_CHANGENAME, dev);
         }
 
@@ -751,7 +751,7 @@ int dev_change_name(struct net_device *dev, char *newname)
  */
 void netdev_features_change(struct net_device *dev)
 {
-        blocking_notifier_call_chain(&netdev_chain, NETDEV_FEAT_CHANGE, dev);
+        raw_notifier_call_chain(&netdev_chain, NETDEV_FEAT_CHANGE, dev);
 }
 EXPORT_SYMBOL(netdev_features_change);
 
@@ -766,7 +766,7 @@ EXPORT_SYMBOL(netdev_features_change);
 void netdev_state_change(struct net_device *dev)
 {
         if (dev->flags & IFF_UP) {
-                blocking_notifier_call_chain(&netdev_chain,
+                raw_notifier_call_chain(&netdev_chain,
                                 NETDEV_CHANGE, dev);
                 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
         }
@@ -864,7 +864,7 @@ int dev_open(struct net_device *dev)
                 /*
                  *      ... and announce new interface.
                  */
-                blocking_notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
+                raw_notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
         }
         return ret;
 }
@@ -887,7 +887,7 @@ int dev_close(struct net_device *dev)
          *      Tell people we are going down, so that they can
          *      prepare to death, when device is still operating.
          */
-        blocking_notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
+        raw_notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
 
         dev_deactivate(dev);
 
@@ -924,7 +924,7 @@ int dev_close(struct net_device *dev)
         /*
          * Tell people we are down
          */
-        blocking_notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
+        raw_notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
 
         return 0;
 }
@@ -955,7 +955,7 @@ int register_netdevice_notifier(struct notifier_block *nb)
         int err;
 
         rtnl_lock();
-        err = blocking_notifier_chain_register(&netdev_chain, nb);
+        err = raw_notifier_chain_register(&netdev_chain, nb);
         if (!err) {
                 for (dev = dev_base; dev; dev = dev->next) {
                         nb->notifier_call(nb, NETDEV_REGISTER, dev);
@@ -983,7 +983,7 @@ int unregister_netdevice_notifier(struct notifier_block *nb)
         int err;
 
         rtnl_lock();
-        err = blocking_notifier_chain_unregister(&netdev_chain, nb);
+        err = raw_notifier_chain_unregister(&netdev_chain, nb);
         rtnl_unlock();
         return err;
 }
@@ -994,12 +994,12 @@ int unregister_netdevice_notifier(struct notifier_block *nb)
  *      @v:   pointer passed unmodified to notifier function
  *
  *      Call all network notifier blocks.  Parameters and return value
- *      are as for blocking_notifier_call_chain().
+ *      are as for raw_notifier_call_chain().
  */
 
 int call_netdevice_notifiers(unsigned long val, void *v)
 {
-        return blocking_notifier_call_chain(&netdev_chain, val, v);
+        return raw_notifier_call_chain(&netdev_chain, val, v);
 }
 
 /* When > 0 there are consumers of rx skb time stamps */
@@ -2308,7 +2308,7 @@ int dev_change_flags(struct net_device *dev, unsigned flags)
         if (dev->flags & IFF_UP &&
             ((old_flags ^ dev->flags) &~ (IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
                                           IFF_VOLATILE)))
-                blocking_notifier_call_chain(&netdev_chain,
+                raw_notifier_call_chain(&netdev_chain,
                                 NETDEV_CHANGE, dev);
 
         if ((flags ^ dev->gflags) & IFF_PROMISC) {
@@ -2353,7 +2353,7 @@ int dev_set_mtu(struct net_device *dev, int new_mtu)
         else
                 dev->mtu = new_mtu;
         if (!err && dev->flags & IFF_UP)
-                blocking_notifier_call_chain(&netdev_chain,
+                raw_notifier_call_chain(&netdev_chain,
                                 NETDEV_CHANGEMTU, dev);
         return err;
 }
@@ -2370,7 +2370,7 @@ int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa)
                 return -ENODEV;
         err = dev->set_mac_address(dev, sa);
         if (!err)
-                blocking_notifier_call_chain(&netdev_chain,
+                raw_notifier_call_chain(&netdev_chain,
                                 NETDEV_CHANGEADDR, dev);
         return err;
 }
@@ -2427,7 +2427,7 @@ static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd)
                                 return -EINVAL;
                         memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
                                min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
-                        blocking_notifier_call_chain(&netdev_chain,
+                        raw_notifier_call_chain(&netdev_chain,
                                             NETDEV_CHANGEADDR, dev);
                         return 0;
 
@@ -2777,6 +2777,8 @@ int register_netdevice(struct net_device *dev)
         BUG_ON(dev_boot_phase);
         ASSERT_RTNL();
 
+        might_sleep();
+
         /* When net_device's are persistent, this will be fatal. */
         BUG_ON(dev->reg_state != NETREG_UNINITIALIZED);
 
@@ -2863,6 +2865,11 @@ int register_netdevice(struct net_device *dev)
         if (!dev->rebuild_header)
                 dev->rebuild_header = default_rebuild_header;
 
+        ret = netdev_register_sysfs(dev);
+        if (ret)
+                goto out_err;
+        dev->reg_state = NETREG_REGISTERED;
+
         /*
          *      Default initial state at registry is that the
          *      device is present.
@@ -2878,14 +2885,11 @@ int register_netdevice(struct net_device *dev)
         hlist_add_head(&dev->name_hlist, head);
         hlist_add_head(&dev->index_hlist, dev_index_hash(dev->ifindex));
         dev_hold(dev);
-        dev->reg_state = NETREG_REGISTERING;
         write_unlock_bh(&dev_base_lock);
 
         /* Notify protocols, that a new device appeared. */
-        blocking_notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
+        raw_notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
 
-        /* Finish registration after unlock */
-        net_set_todo(dev);
         ret = 0;
 
 out:
@@ -2961,7 +2965,7 @@ static void netdev_wait_allrefs(struct net_device *dev)
                         rtnl_lock();
 
                         /* Rebroadcast unregister notification */
-                        blocking_notifier_call_chain(&netdev_chain,
+                        raw_notifier_call_chain(&netdev_chain,
                                             NETDEV_UNREGISTER, dev);
 
                         if (test_bit(__LINK_STATE_LINKWATCH_PENDING,
@@ -3008,7 +3012,7 @@ static void netdev_wait_allrefs(struct net_device *dev)
  *
  * We are invoked by rtnl_unlock() after it drops the semaphore.
  * This allows us to deal with problems:
- * 1) We can create/delete sysfs objects which invoke hotplug
+ * 1) We can delete sysfs objects which invoke hotplug
  *    without deadlocking with linkwatch via keventd.
  * 2) Since we run with the RTNL semaphore not held, we can sleep
  *    safely in order to wait for the netdev refcnt to drop to zero.
@@ -3017,8 +3021,6 @@ static DEFINE_MUTEX(net_todo_run_mutex);
 void netdev_run_todo(void)
 {
         struct list_head list = LIST_HEAD_INIT(list);
-        int err;
-
 
         /* Need to guard against multiple cpu's getting out of order. */
         mutex_lock(&net_todo_run_mutex);
@@ -3041,40 +3043,29 @@ void netdev_run_todo(void)
                         = list_entry(list.next, struct net_device, todo_list);
                 list_del(&dev->todo_list);
 
-                switch(dev->reg_state) {
-                case NETREG_REGISTERING:
-                        dev->reg_state = NETREG_REGISTERED;
-                        err = netdev_register_sysfs(dev);
-                        if (err)
-                                printk(KERN_ERR "%s: failed sysfs registration (%d)\n",
-                                       dev->name, err);
-                        break;
-
-                case NETREG_UNREGISTERING:
-                        netdev_unregister_sysfs(dev);
-                        dev->reg_state = NETREG_UNREGISTERED;
-
-                        netdev_wait_allrefs(dev);
+                if (unlikely(dev->reg_state != NETREG_UNREGISTERING)) {
+                        printk(KERN_ERR "network todo '%s' but state %d\n",
+                               dev->name, dev->reg_state);
+                        dump_stack();
+                        continue;
+                }
 
-                        /* paranoia */
-                        BUG_ON(atomic_read(&dev->refcnt));
-                        BUG_TRAP(!dev->ip_ptr);
-                        BUG_TRAP(!dev->ip6_ptr);
-                        BUG_TRAP(!dev->dn_ptr);
+                netdev_unregister_sysfs(dev);
+                dev->reg_state = NETREG_UNREGISTERED;
 
+                netdev_wait_allrefs(dev);
 
-                        /* It must be the very last action, 
-                         * after this 'dev' may point to freed up memory.
-                         */
-                        if (dev->destructor)
-                                dev->destructor(dev);
-                        break;
+                /* paranoia */
+                BUG_ON(atomic_read(&dev->refcnt));
+                BUG_TRAP(!dev->ip_ptr);
+                BUG_TRAP(!dev->ip6_ptr);
+                BUG_TRAP(!dev->dn_ptr);
 
-                default:
-                        printk(KERN_ERR "network todo '%s' but state %d\n",
-                               dev->name, dev->reg_state);
-                        break;
-                }
+                /* It must be the very last action,
+                 * after this 'dev' may point to freed up memory.
+                 */
+                if (dev->destructor)
+                        dev->destructor(dev);
         }
 
 out:
@@ -3216,7 +3207,7 @@ int unregister_netdevice(struct net_device *dev)
         /* Notify protocols, that we are about to destroy
            this device. They should clean all the things.
         */
-        blocking_notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
+        raw_notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
         
         /*
          *      Flush the multicast chain