ifb: dont hard code inet_net use

ifb should lookup devices in the appropriate namespace.

Signed-off-by: Eric Dumazet <[e-mail]>
Acked-by: Jamal Hadi Salim <[e-mail]>
Cc: Benjamin LaHaise <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ifb.c

···
 		u64_stats_update_end(&dp->tsync);
 
 		rcu_read_lock();
-		skb->dev = dev_get_by_index_rcu(&init_net, skb->skb_iif);
+		skb->dev = dev_get_by_index_rcu(dev_net(_dev), skb->skb_iif);
 		if (!skb->dev) {
 			rcu_read_unlock();
 			dev_kfree_skb(skb);