Commit d4c80d9d authored Jan 30, 2014 by Sujith Manoharan Committed by Johannes Berg Feb 06, 2014

mac80211: Fix IBSS disconnect



Currently, when a station leaves an IBSS network, the
corresponding BSS is not dropped from cfg80211 if there are
other active stations in the network. But, the small
window that is present when trying to determine a station's
status based on IEEE80211_IBSS_MERGE_INTERVAL introduces
a race.

Instead of trying to keep the BSS, always remove it when
leaving an IBSS network. There is not much benefit to retain
the BSS entry since it will be added with a subsequent join
operation.

This fixes an issue where a dangling BSS entry causes ath9k
to wait for a beacon indefinitely.

Cc: <stable@vger.kernel.org>
Reported-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

parent 0297ea17

net/mac80211/ibss.c

+1 −4

Original line number	Diff line number	Diff line
		@@ -695,12 +695,9 @@ static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata)
		struct cfg80211_bss *cbss;
		struct beacon_data *presp;
		struct sta_info *sta;
		int active_ibss;
		u16 capability;

		active_ibss = ieee80211_sta_active_ibss(sdata);

		if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) {
		if (!is_zero_ether_addr(ifibss->bssid)) {
		capability = WLAN_CAPABILITY_IBSS;

		if (ifibss->privacy)

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