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mac80211: Early detection of broken mesh paths when using minstrel. 

This change triggers a path discovery as soon as the link quality degrades
below a certain threshold.  This results in a faster path recovery time than
by simply relying on the periodic path refresh mechanism to detect broken
links.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Javier Cardona 2009-08-10 12:15:50 -07:00 committed by John W. Linville
parent d403a1c66e
commit 5815814bfa
1 changed files with 7 additions and 1 deletions
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8
net/mac80211/rc80211_minstrel.c
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@ -51,6 +51,7 @@
#include <linux/random.h>
#include <linux/ieee80211.h>
#include <net/mac80211.h>
#include "mesh.h"
#include "rate.h"
#include "rc80211_minstrel.h"
@ -178,9 +179,14 @@ minstrel_tx_status(void *priv, struct ieee80211_supported_band *sband,
if ((i != IEEE80211_TX_MAX_RATES - 1) && (ar[i + 1].idx < 0)) {
mi->r[ndx].success += success;
if (si)
if (si) {
si->fail_avg = (18050 - mi->r[ndx].probability)
/ 180;
WARN_ON(si->fail_avg > 100);
if (si->fail_avg == 100 &&
ieee80211_vif_is_mesh(&si->sdata->vif))
mesh_plink_broken(si);
}
}
}