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mac80211: improve performance a bit

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20145 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2010-03-11 15:30:37 +00:00
parent 472d19b31d
commit a44b9961dc
1 changed files with 48 additions and 0 deletions
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48
package/mac80211/patches/580-tx_status_optimization.patch Normal file
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@ -0,0 +1,48 @@
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -171,7 +171,7 @@ void ieee80211_tx_status(struct ieee8021
struct net_device *prev_dev = NULL;
struct sta_info *sta, *tmp;
int retry_count = -1, i;
- bool injected;
+ bool send_to_cooked;
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
/* the HW cannot have attempted that rate */
@@ -296,11 +296,15 @@ void ieee80211_tx_status(struct ieee8021
/* this was a transmitted frame, but now we want to reuse it */
skb_orphan(skb);
+ /* Need to make a copy before skb->cb gets cleared */
+ send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
+ (type != IEEE80211_FTYPE_DATA);
+
/*
* This is a bit racy but we can avoid a lot of work
* with this test...
*/
- if (!local->monitors && !local->cooked_mntrs) {
+ if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
dev_kfree_skb(skb);
return;
}
@@ -345,9 +349,6 @@ void ieee80211_tx_status(struct ieee8021
/* for now report the total retry_count */
rthdr->data_retries = retry_count;
- /* Need to make a copy before skb->cb gets cleared */
- injected = !!(info->flags & IEEE80211_TX_CTL_INJECTED);
-
/* XXX: is this sufficient for BPF? */
skb_set_mac_header(skb, 0);
skb->ip_summed = CHECKSUM_UNNECESSARY;
@@ -362,8 +363,7 @@ void ieee80211_tx_status(struct ieee8021
continue;
if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) &&
- !injected &&
- (type == IEEE80211_FTYPE_DATA))
+ !send_to_cooked)
continue;
if (prev_dev) {