bonding: slight optimization for bond_3ad_xmit_xor()

The bond_dev_queue_xmit() will always return 0, and as a fast path,
it is inappropriate to check the res value when xmit every package,
so remove the res check and avoid once judgement for xmit.

Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 5393e1e..8d7483d 100644 (file)
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -2401,13 +2401,12 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
        struct list_head *iter;
        int slaves_in_agg;
        int slave_agg_no;
-       int res = 1;
        int agg_id;
 
        if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
                pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n",
                         dev->name);
-               goto out;
+               goto err_free;
        }
 
        slaves_in_agg = ad_info.ports;
@@ -2415,7 +2414,7 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
 
        if (slaves_in_agg == 0) {
                pr_debug("%s: Error: active aggregator is empty\n", dev->name);
-               goto out;
+               goto err_free;
        }
 
        slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg);
@@ -2434,7 +2433,7 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
                }
 
                if (SLAVE_IS_OK(slave)) {
-                       res = bond_dev_queue_xmit(bond, skb, slave->dev);
+                       bond_dev_queue_xmit(bond, skb, slave->dev);
                        goto out;
                }
        }
@@ -2442,21 +2441,22 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
        if (slave_agg_no >= 0) {
                pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
                       dev->name, agg_id);
-               goto out;
+               goto err_free;
        }
 
        /* we couldn't find any suitable slave after the agg_no, so use the
         * first suitable found, if found. */
        if (first_ok_slave)
-               res = bond_dev_queue_xmit(bond, skb, first_ok_slave->dev);
+               bond_dev_queue_xmit(bond, skb, first_ok_slave->dev);
+       else
+               goto err_free;
 
 out:
-       if (res) {
-               /* no suitable interface, frame not sent */
-               kfree_skb(skb);
-       }
-
        return NETDEV_TX_OK;
+err_free:
+       /* no suitable interface, frame not sent */
+       kfree_skb(skb);
+       goto out;
 }
 
 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,