batman-adv: Create batman soft interfaces within correct netns.

When creating a soft interface, create it in the same netns as the
hard interface. Replace all references to init_net with the correct
name space for the interface being manipulated.

Suggested-by: Daniel Ehlers <danielehlers@mindeye.net>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
index e7cf513..6b1e54f 100644
--- a/net/batman-adv/sysfs.c
+++ b/net/batman-adv/sysfs.c
@@ -830,6 +830,7 @@
 				       size_t count)
 {
 	struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
+	struct net *net = dev_net(net_dev);
 	struct batadv_hard_iface *hard_iface;
 	int status_tmp = -1;
 	int ret = count;
@@ -873,7 +874,7 @@
 		batadv_hardif_disable_interface(hard_iface,
 						BATADV_IF_CLEANUP_AUTO);
 
-	ret = batadv_hardif_enable_interface(hard_iface, buff);
+	ret = batadv_hardif_enable_interface(hard_iface, net, buff);
 
 unlock:
 	rtnl_unlock();