On Mon, 2011-03-07 at 12:42 +0100, Michael Buesch wrote:
> > > [ 1182.826599] WARNING: at net/mac80211/scan.c:310 ieee80211_rx_bss_free+0x20c/0x4b8 [mac80211]()
Actually ... It just looks like a race:
The pattern is this:
mutex_lock(&local->mtx);
finish = __ieee80211_scan_completed(&local->hw, true, false);
mutex_unlock(&local->mtx);
...
if (finish)
__ieee80211_scan_completed_finish(&local->hw, false);
scan_completed() does
local->scanning = 0;
return true;
The warning is:
WARN_ON(local->scanning & (SCAN_SW_SCANNING | SCAN_HW_SCANNING));
but I don't see anything that would prevent a new scan from beginning
during the time the mutex isn't locked, since everything is set to 0 or
NULL that would block a new scan, I think?
johannes
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