net: pass info struct via netdevice notifier

So far, only net_device * could be passed along with netdevice notifier
event. This patch provides a possibility to pass custom structure
able to provide info that event listener needs to know.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>

v2->v3: fix typo on simeth
	shortened dev_getter
	shortened notifier_info struct name
v1->v2: fix notifier_call parameter in call_netdevice_notifier()
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 8ec1bca7f859..79fe63246b27 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -3331,10 +3331,11 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
 }
 
 
-static int packet_notifier(struct notifier_block *this, unsigned long msg, void *data)
+static int packet_notifier(struct notifier_block *this,
+                           unsigned long msg, void *ptr)
 {
         struct sock *sk;
-        struct net_device *dev = data;
+        struct net_device *dev = netdev_notifier_info_to_dev(ptr);
         struct net *net = dev_net(dev);
 
         rcu_read_lock();