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mac80211: deinitialize ibss-internals after emptiness check 

The check whether the IBSS is active and can be removed should be
performed before deinitializing the fields used for the check/search.
Otherwise, the configured BSS will not be found and removed properly.

To make it more clear for the future, rename sdata->u.ibss to the
local pointer ifibss which is used within the checks.

This behaviour was introduced by
f3209bea11
("mac80211: fix IBSS teardown race")

Cc: stable@vger.kernel.org
Cc: Ignacy Gawedzki <i@lri.fr>
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Simon Wunderlich 2012-11-13 18:43:03 +01:00 committed by Johannes Berg
parent 43c771a196
commit b78a4932f5
1 changed files with 4 additions and 4 deletions
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8
net/mac80211/ibss.c
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@ -1151,10 +1151,6 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
mutex_lock(&sdata->u.ibss.mtx);
sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH;
memset(sdata->u.ibss.bssid, 0, ETH_ALEN);
sdata->u.ibss.ssid_len = 0;
active_ibss = ieee80211_sta_active_ibss(sdata);
if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) {
@ -1175,6 +1171,10 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
}
}
ifibss->state = IEEE80211_IBSS_MLME_SEARCH;
memset(ifibss->bssid, 0, ETH_ALEN);
ifibss->ssid_len = 0;
sta_info_flush(sdata->local, sdata);
spin_lock_bh(&ifibss->incomplete_lock);