linux-kernel - [PATCH] [20/223] mac80211: disable beacon monitor while going offchannel

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Date:	Mon, 13 Dec 2010 00:45:15 +0100 (CET)
From:	Andi Kleen <andi@...stfloor.org>
To:	lrodriguez@...eros.com, pstew@...gle.com, amod.bodas@...eros.com,
	linville@...driver.com, gregkh@...e.de, ak@...ux.intel.com,
	linux-kernel@...r.kernel.org, stable@...nel.org
Subject: [PATCH] [20/223] mac80211: disable beacon monitor while going offchannel

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Luis R. Rodriguez <lrodriguez@...eros.com>

commit 3bc3c0d748402e8c1f31b8569f5924d25d7b8e30 upstream.

The beacon monitor should be disabled when going off channel
to prevent spurious warnings and triggering connection
deterioration work such as sending probe requests. Re-enable
the beacon monitor once we come back to the home channel.

This patch has fixes for stable kernels [2.6.34+].

Cc: Paul Stewart <pstew@...gle.com>
Cc: Amod Bodas <amod.bodas@...eros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@...eros.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 net/mac80211/offchannel.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux/net/mac80211/offchannel.c
===================================================================
--- linux.orig/net/mac80211/offchannel.c
+++ linux/net/mac80211/offchannel.c
@@ -29,6 +29,7 @@ static void ieee80211_offchannel_ps_enab
 	/* FIXME: what to do when local->pspolling is true? */

 	del_timer_sync(&local->dynamic_ps_timer);
+	del_timer_sync(&ifmgd->bcn_mon_timer);
 	del_timer_sync(&ifmgd->conn_mon_timer);

 	cancel_work_sync(&local->dynamic_ps_enable_work);
@@ -89,6 +90,7 @@ static void ieee80211_offchannel_ps_disa
 			  msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
 	}

+	ieee80211_sta_reset_beacon_monitor(sdata);
 	ieee80211_sta_reset_conn_monitor(sdata);
 }

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