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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>
This commit is contained in:
Christian Lamparter 2009-07-19 22:09:32 +02:00 committed by John W. Linville
parent 9ab56078e6
commit a99d02483a
1 changed files with 3 additions and 0 deletions
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3
net/mac80211/mlme.c
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@ -2213,6 +2213,9 @@ static void ieee80211_sta_monitor_work(struct work_struct *work)
container_of(work, struct ieee80211_sub_if_data,
u.mgd.monitor_work);
if (sdata->local->sw_scanning || sdata->local->hw_scanning)
return;
ieee80211_mgd_probe_ap(sdata, false);
}