bonding: drop_monitor aware

When packets are dropped in TX path, its better to use kfree_skb()
instead of dev_kfree_skb() to give proper drop_monitor events.

Also move the kfree_skb() call after read_unlock() in bond_alb_xmit()
and bond_xmit_activebackup()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index ef3791a..e15cc11 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -1346,12 +1346,12 @@
 		}
 	}
 
-	if (res) {
-		/* no suitable interface, frame not sent */
-		dev_kfree_skb(skb);
-	}
 	read_unlock(&bond->curr_slave_lock);
 
+	if (res) {
+		/* no suitable interface, frame not sent */
+		kfree_skb(skb);
+	}
 	return NETDEV_TX_OK;
 }