rtnetlink & bonding: change args got get_tx_queues

Change get_tx_queues, drop unsused arg/return value real_tx_queues,
and use return by value (with error) rather than call by reference.

Probably bonding should just change to LLTX and the whole get_tx_queues
API could disappear!
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -4820,12 +4820,9 @@ static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
 	return 0;
 }
 
-static int bond_get_tx_queues(struct net *net, struct nlattr *tb[],
-			      unsigned int *num_queues,
-			      unsigned int *real_num_queues)
+static int bond_get_tx_queues(struct net *net, const struct nlattr *tb[])
 {
-	*num_queues = tx_queues;
-	return 0;
+	return tx_queues;
 }
 
 static struct rtnl_link_ops bond_link_ops __read_mostly = {

include/net/rtnetlink.h

@@ -75,9 +75,8 @@ struct rtnl_link_ops {
 	size_t			(*get_xstats_size)(const struct net_device *dev);
 	int			(*fill_xstats)(struct sk_buff *skb,
 					       const struct net_device *dev);
-	int			(*get_tx_queues)(struct net *net, struct nlattr *tb[],
-						 unsigned int *tx_queues,
-						 unsigned int *real_tx_queues);
+	int			(*get_tx_queues)(struct net *net,
+						 const struct nlattr *tb[]);
 };
 
 extern int	__rtnl_link_register(struct rtnl_link_ops *ops);

net/core/rtnetlink.c

@@ -1640,14 +1640,14 @@ struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
 	int err;
 	struct net_device *dev;
 	unsigned int num_queues = 1;
-	unsigned int real_num_queues = 1;
 
 	if (ops->get_tx_queues) {
-		err = ops->get_tx_queues(src_net, tb, &num_queues,
-					 &real_num_queues);
-		if (err)
+		err = ops->get_tx_queues(src_net, tb);
+		if (err < 0)
 			goto err;
+		num_queues = err;
 	}
+
 	err = -ENOMEM;
 	dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
 	if (!dev)