AcoSail/kernel_optimize_test
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bonding: slight optimization for bond_3ad_xmit_xor()

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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>
This commit is contained in:
dingtianhong 2014-01-02 09:12:59 +08:00 committed by David S. Miller
parent 815117adaf
commit a742e1f545
1 changed files with 11 additions and 11 deletions
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22
drivers/net/bonding/bond_3ad.c
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@ -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,