From 34e8f08231388f9e16c6f1e2461f53afaf7f1e5e Mon Sep 17 00:00:00 2001
From: Alina Friedrichsen <x-alina@gmx.net>
Date: Sun, 22 Feb 2009 00:07:28 +0100
Subject: [PATCH] mac80211: Don't merge with the same BSSID
It was not a good idea to do a TSF reset on strange IBSS merges to the same BSSID. For example it will break the TSF sync of ath9k completely and it is unnecessary as all hardware I have tested do a TSF sync to a higher value automatically and IBSS merges are only done to higher TSF values. It only need a TSF reset to accept a lower value, when the IBSS network is changed manually.
Signed-off-by: Alina Friedrichsen <x-alina@gmx.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
net/mac80211/ibss.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index aa8937c56285..7a944ca1c840 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -291,6 +291,10 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
sdata->u.ibss.ssid_len))
goto put_bss;
+ /* same BSSID */
+ if (memcmp(bss->cbss.bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0)
+ goto put_bss;
+
if (rx_status->flag & RX_FLAG_TSFT) {
/*
* For correct IBSS merging we need mactime; since mactime is
--
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