From: Ben Greear Date: Wed, 20 Feb 2013 17:41:08 +0000 (-0800) Subject: mac80211: stop timers before canceling work items X-Git-Tag: master-2013-03-08~4^2~57^2~7 X-Git-Url: http://pileus.org/git/?a=commitdiff_plain;h=9b5bd5a4917eeb5eca00d1842a74186cfc8dd1c6;p=~andy%2Flinux mac80211: stop timers before canceling work items Re-order the quiesce code so that timers are always stopped before work-items are flushed. This was not the problem I saw, but I think it may still be more correct. Signed-off-by: Ben Greear Signed-off-by: Johannes Berg --- diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 9f6464f3e05..6044c6d87e4 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -3502,6 +3502,14 @@ void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; + /* + * Stop timers before deleting work items, as timers + * could race and re-add the work-items. They will be + * re-established on connection. + */ + del_timer_sync(&ifmgd->conn_mon_timer); + del_timer_sync(&ifmgd->bcn_mon_timer); + /* * we need to use atomic bitops for the running bits * only because both timers might fire at the same @@ -3516,13 +3524,9 @@ void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) if (del_timer_sync(&ifmgd->timer)) set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); - cancel_work_sync(&ifmgd->chswitch_work); if (del_timer_sync(&ifmgd->chswitch_timer)) set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); - - /* these will just be re-established on connection */ - del_timer_sync(&ifmgd->conn_mon_timer); - del_timer_sync(&ifmgd->bcn_mon_timer); + cancel_work_sync(&ifmgd->chswitch_work); } void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)