diff options
| author | Ben Greear <greearb@candelatech.com> | 2013-02-20 09:41:08 -0800 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-02-26 22:47:27 +0100 |
| commit | 9b5bd5a4917eeb5eca00d1842a74186cfc8dd1c6 (patch) | |
| tree | 091b95a3412105fe1f7c58e54f1717e34d96ad72 | |
| parent | cb601ffa326bc5c74a6ecd8e72ae9631e5f12f75 (diff) | |
| download | lwn-9b5bd5a4917eeb5eca00d1842a74186cfc8dd1c6.tar.gz lwn-9b5bd5a4917eeb5eca00d1842a74186cfc8dd1c6.zip | |
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 <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | net/mac80211/mlme.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 9f6464f3e05f..6044c6d87e4c 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -3503,6 +3503,14 @@ 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 * time -- the code here is properly synchronised. @@ -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) |