wifi: mac80211: move monitor work to wiphy work

Again this serves to simplify the locking in mac80211
in the future, since this is a relatively complex work.
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/ieee80211_i.h

@@ -473,7 +473,7 @@ struct ieee80211_if_managed {
 	struct timer_list timer;
 	struct timer_list conn_mon_timer;
 	struct timer_list bcn_mon_timer;
-	struct work_struct monitor_work;
+	struct wiphy_work monitor_work;
 	struct wiphy_work beacon_connection_loss_work;
 	struct wiphy_work csa_connection_drop_work;
 

net/mac80211/mlme.c

@@ -6683,10 +6683,11 @@ static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
 		return;
 	}
 
-	ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
+	wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work);
 }
 
-static void ieee80211_sta_monitor_work(struct work_struct *work)
+static void ieee80211_sta_monitor_work(struct wiphy *wiphy,
+				       struct wiphy_work *work)
 {
 	struct ieee80211_sub_if_data *sdata =
 		container_of(work, struct ieee80211_sub_if_data,
@@ -6702,7 +6703,7 @@ static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
 
 		/* let's probe the connection once */
 		if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
-			ieee80211_queue_work(&sdata->local->hw,
+			wiphy_work_queue(sdata->local->hw.wiphy,
 					 &sdata->u.mgd.monitor_work);
 	}
 }
@@ -6821,7 +6822,7 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
-	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
+	wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
 	wiphy_work_init(&ifmgd->beacon_connection_loss_work,
 			ieee80211_beacon_connection_loss_work);
 	wiphy_work_init(&ifmgd->csa_connection_drop_work,
@@ -7850,7 +7851,8 @@ void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
 	 * they will not do anything but might not have been
 	 * cancelled when disconnecting.
 	 */
-	cancel_work_sync(&ifmgd->monitor_work);
+	wiphy_work_cancel(sdata->local->hw.wiphy,
+			  &ifmgd->monitor_work);
 	wiphy_work_cancel(sdata->local->hw.wiphy,
 			  &ifmgd->beacon_connection_loss_work);
 	wiphy_work_cancel(sdata->local->hw.wiphy,