Commit a99d0248 authored Jul 19, 2009 by Christian Lamparter Committed by John W. Linville Jul 24, 2009

mac80211: do not monitor the connection while scanning

mac80211 constantly monitors the connection to the associated AP
in order to check if it is out of reach/dead.

This is absolutely fine most of the time.
Except when there is a scheduled scan for the whole neighborhood.
After all this path could trigger while scanning on different channel.
Or even worse: this AP probing triggers a WARN_ON in rate_lowest_index
when the scan code did a band transition!
( http://www.kerneloops.org/raw.php?rawid=449304

 )

Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

parent 9ab56078

net/mac80211/mlme.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -2213,6 +2213,9 @@ static void ieee80211_sta_monitor_work(struct work_struct *work)
	container_of(work, struct ieee80211_sub_if_data,		container_of(work, struct ieee80211_sub_if_data,
	u.mgd.monitor_work);		u.mgd.monitor_work);

			if (sdata->local->sw_scanning \|\| sdata->local->hw_scanning)
			return;

	ieee80211_mgd_probe_ap(sdata, false);		ieee80211_mgd_probe_ap(sdata, false);
	}		}