net: introduce NETDEV_POST_INIT notifier

For various purposes including a wireless extensions
bugfix, we need to hook into the netdev creation before
before netdev_register_kobject(). This will also ease
doing the dev type assignment that Marcel was working
on for cfg80211 drivers w/o touching them all.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/notifier.h b/include/linux/notifier.h
index 44428d2..29714b8 100644 (file)
--- a/include/linux/notifier.h
+++ b/include/linux/notifier.h
@@ -201,6 +201,7 @@ static inline int notifier_to_errno(int ret)
 #define NETDEV_PRE_UP          0x000D
 #define NETDEV_BONDING_OLDTYPE  0x000E
 #define NETDEV_BONDING_NEWTYPE  0x000F
+#define NETDEV_POST_INIT       0x0010
 
 #define SYS_DOWN       0x0001  /* Notify of system down */
 #define SYS_RESTART    SYS_DOWN

diff --git a/net/core/dev.c b/net/core/dev.c
index b8f74cf..a74c8fd 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4836,6 +4836,12 @@ int register_netdevice(struct net_device *dev)
                dev->features |= NETIF_F_GSO;
 
        netdev_initialize_kobject(dev);
+
+       ret = call_netdevice_notifiers(NETDEV_POST_INIT, dev);
+       ret = notifier_to_errno(ret);
+       if (ret)
+               goto err_uninit;
+
        ret = netdev_register_kobject(dev);
        if (ret)
                goto err_uninit;