mac80211: use common work struct

IBSS, managed and mesh modes all have their
own work struct, and in the future we want
to also use it in other modes to process
frames from the now common skb queue.

This also makes the skb queue and work safe
to use from other interface types.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 files changed, 29 insertions, 38 deletions

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index a9ff904..18c4266 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -761,7 +761,7 @@ static void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 static void ieee80211_ibss_work(struct work_struct *work)
 {
 	struct ieee80211_sub_if_data *sdata =
-		container_of(work, struct ieee80211_sub_if_data, u.ibss.work);
+		container_of(work, struct ieee80211_sub_if_data, work);
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_if_ibss *ifibss;
 	struct sk_buff *skb;
@@ -804,7 +804,7 @@ static void ieee80211_queue_ibss_work(struct ieee80211_sub_if_data *sdata)
 	struct ieee80211_local *local = sdata->local;
 
 	set_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request);
-	ieee80211_queue_work(&local->hw, &ifibss->work);
+	ieee80211_queue_work(&local->hw, &sdata->work);
 }
 
 static void ieee80211_ibss_timer(unsigned long data)
@@ -827,7 +827,6 @@ void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
 
-	cancel_work_sync(&ifibss->work);
 	if (del_timer_sync(&ifibss->timer))
 		ifibss->timer_running = true;
 }
@@ -847,7 +846,7 @@ void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
 
-	INIT_WORK(&ifibss->work, ieee80211_ibss_work);
+	INIT_WORK(&sdata->work, ieee80211_ibss_work);
 	setup_timer(&ifibss->timer, ieee80211_ibss_timer,
 		    (unsigned long) sdata);
 }
@@ -890,7 +889,7 @@ ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
 	case IEEE80211_STYPE_PROBE_REQ:
 	case IEEE80211_STYPE_AUTH:
 		skb_queue_tail(&sdata->skb_queue, skb);
-		ieee80211_queue_work(&local->hw, &sdata->u.ibss.work);
+		ieee80211_queue_work(&local->hw, &sdata->work);
 		return RX_QUEUED;
 	}
 
@@ -956,7 +955,7 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 	ieee80211_recalc_idle(sdata->local);
 
 	set_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request);
-	ieee80211_queue_work(&sdata->local->hw, &sdata->u.ibss.work);
+	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
 
 	return 0;
 }
@@ -967,7 +966,7 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
 
 	del_timer_sync(&sdata->u.ibss.timer);
 	clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request);
-	cancel_work_sync(&sdata->u.ibss.work);
+	cancel_work_sync(&sdata->work);
 	clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request);
 
 	sta_info_flush(sdata->local, sdata);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 3cc3867..2873f63 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -325,7 +325,6 @@ struct ieee80211_if_managed {
 	struct timer_list conn_mon_timer;
 	struct timer_list bcn_mon_timer;
 	struct timer_list chswitch_timer;
-	struct work_struct work;
 	struct work_struct monitor_work;
 	struct work_struct chswitch_work;
 	struct work_struct beacon_connection_loss_work;
@@ -384,7 +383,6 @@ enum ieee80211_ibss_request {
 
 struct ieee80211_if_ibss {
 	struct timer_list timer;
-	struct work_struct work;
 
 	unsigned long request;
 	unsigned long last_scan_completed;
@@ -412,7 +410,6 @@ struct ieee80211_if_ibss {
 };
 
 struct ieee80211_if_mesh {
-	struct work_struct work;
 	struct timer_list housekeeping_timer;
 	struct timer_list mesh_path_timer;
 	struct timer_list mesh_path_root_timer;
@@ -512,6 +509,7 @@ struct ieee80211_sub_if_data {
 
 	u16 sequence_number;
 
+	struct work_struct work;
 	struct sk_buff_head skb_queue;
 
 	/*
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 56167a3..de7ddc3 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -460,17 +460,14 @@ static int ieee80211_stop(struct net_device *dev)
 		 * whether the interface is running, which, at this point,
 		 * it no longer is.
 		 */
-		cancel_work_sync(&sdata->u.mgd.work);
 		cancel_work_sync(&sdata->u.mgd.chswitch_work);
 		cancel_work_sync(&sdata->u.mgd.monitor_work);
 		cancel_work_sync(&sdata->u.mgd.beacon_connection_loss_work);
 
 		/* fall through */
 	case NL80211_IFTYPE_ADHOC:
-		if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+		if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
 			del_timer_sync(&sdata->u.ibss.timer);
-			cancel_work_sync(&sdata->u.ibss.work);
-		}
 		/* fall through */
 	case NL80211_IFTYPE_MESH_POINT:
 		if (ieee80211_vif_is_mesh(&sdata->vif)) {
@@ -485,6 +482,7 @@ static int ieee80211_stop(struct net_device *dev)
 		}
 		/* fall through */
 	default:
+		cancel_work_sync(&sdata->work);
 		/*
 		 * When we get here, the interface is marked down.
 		 * Call synchronize_rcu() to wait for the RX path
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 065533a..be9aa98 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -54,7 +54,7 @@ static void ieee80211_mesh_housekeeping_timer(unsigned long data)
 		return;
 	}
 
-	ieee80211_queue_work(&local->hw, &ifmsh->work);
+	ieee80211_queue_work(&local->hw, &sdata->work);
 }
 
 /**
@@ -345,7 +345,7 @@ static void ieee80211_mesh_path_timer(unsigned long data)
 		return;
 	}
 
-	ieee80211_queue_work(&local->hw, &ifmsh->work);
+	ieee80211_queue_work(&local->hw, &sdata->work);
 }
 
 static void ieee80211_mesh_path_root_timer(unsigned long data)
@@ -362,7 +362,7 @@ static void ieee80211_mesh_path_root_timer(unsigned long data)
 		return;
 	}
 
-	ieee80211_queue_work(&local->hw, &ifmsh->work);
+	ieee80211_queue_work(&local->hw, &sdata->work);
 }
 
 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
@@ -484,9 +484,6 @@ void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 
-	/* might restart the timer but that doesn't matter */
-	cancel_work_sync(&ifmsh->work);
-
 	/* use atomic bitops in case both timers fire at the same time */
 
 	if (del_timer_sync(&ifmsh->housekeeping_timer))
@@ -518,7 +515,7 @@ void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
 
 	set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
 	ieee80211_mesh_root_setup(ifmsh);
-	ieee80211_queue_work(&local->hw, &ifmsh->work);
+	ieee80211_queue_work(&local->hw, &sdata->work);
 	sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL;
 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON |
 						BSS_CHANGED_BEACON_ENABLED |
@@ -536,7 +533,7 @@ void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
 	 * whether the interface is running, which, at this point,
 	 * it no longer is.
 	 */
-	cancel_work_sync(&sdata->u.mesh.work);
+	cancel_work_sync(&sdata->work);
 }
 
 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
@@ -630,7 +627,7 @@ static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 static void ieee80211_mesh_work(struct work_struct *work)
 {
 	struct ieee80211_sub_if_data *sdata =
-		container_of(work, struct ieee80211_sub_if_data, u.mesh.work);
+		container_of(work, struct ieee80211_sub_if_data, work);
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct sk_buff *skb;
@@ -669,7 +666,7 @@ void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
 	rcu_read_lock();
 	list_for_each_entry_rcu(sdata, &local->interfaces, list)
 		if (ieee80211_vif_is_mesh(&sdata->vif))
-			ieee80211_queue_work(&local->hw, &sdata->u.mesh.work);
+			ieee80211_queue_work(&local->hw, &sdata->work);
 	rcu_read_unlock();
 }
 
@@ -677,7 +674,7 @@ void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 
-	INIT_WORK(&ifmsh->work, ieee80211_mesh_work);
+	INIT_WORK(&sdata->work, ieee80211_mesh_work);
 	setup_timer(&ifmsh->housekeeping_timer,
 		    ieee80211_mesh_housekeeping_timer,
 		    (unsigned long) sdata);
@@ -726,7 +723,6 @@ ieee80211_rx_result
 ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
 {
 	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct ieee80211_mgmt *mgmt;
 	u16 fc;
 
@@ -741,7 +737,7 @@ ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
 	case IEEE80211_STYPE_PROBE_RESP:
 	case IEEE80211_STYPE_BEACON:
 		skb_queue_tail(&sdata->skb_queue, skb);
-		ieee80211_queue_work(&local->hw, &ifmsh->work);
+		ieee80211_queue_work(&local->hw, &sdata->work);
 		return RX_QUEUED;
 	}
 
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 0705018..829e08a 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -805,14 +805,14 @@ static void mesh_queue_preq(struct mesh_path *mpath, u8 flags)
 	spin_unlock(&ifmsh->mesh_preq_queue_lock);
 
 	if (time_after(jiffies, ifmsh->last_preq + min_preq_int_jiff(sdata)))
-		ieee80211_queue_work(&sdata->local->hw, &ifmsh->work);
+		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
 
 	else if (time_before(jiffies, ifmsh->last_preq)) {
 		/* avoid long wait if did not send preqs for a long time
 		 * and jiffies wrapped around
 		 */
 		ifmsh->last_preq = jiffies - min_preq_int_jiff(sdata) - 1;
-		ieee80211_queue_work(&sdata->local->hw, &ifmsh->work);
+		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
 	} else
 		mod_timer(&ifmsh->mesh_path_timer, ifmsh->last_preq +
 						min_preq_int_jiff(sdata));
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 181ffd6..349e466 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -315,7 +315,7 @@ int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata)
 	read_unlock(&pathtbl_resize_lock);
 	if (grow) {
 		set_bit(MESH_WORK_GROW_MPATH_TABLE,  &ifmsh->wrkq_flags);
-		ieee80211_queue_work(&local->hw, &ifmsh->work);
+		ieee80211_queue_work(&local->hw, &sdata->work);
 	}
 	return 0;
 
@@ -425,7 +425,7 @@ int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata)
 	read_unlock(&pathtbl_resize_lock);
 	if (grow) {
 		set_bit(MESH_WORK_GROW_MPP_TABLE,  &ifmsh->wrkq_flags);
-		ieee80211_queue_work(&local->hw, &ifmsh->work);
+		ieee80211_queue_work(&local->hw, &sdata->work);
 	}
 	return 0;
 
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 854ef4e..75b896d 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1653,7 +1653,7 @@ ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 	case IEEE80211_STYPE_DISASSOC:
 	case IEEE80211_STYPE_ACTION:
 		skb_queue_tail(&sdata->skb_queue, skb);
-		ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
+		ieee80211_queue_work(&local->hw, &sdata->work);
 		return RX_QUEUED;
 	}
 
@@ -1779,13 +1779,13 @@ static void ieee80211_sta_timer(unsigned long data)
 		return;
 	}
 
-	ieee80211_queue_work(&local->hw, &ifmgd->work);
+	ieee80211_queue_work(&local->hw, &sdata->work);
 }
 
 static void ieee80211_sta_work(struct work_struct *work)
 {
 	struct ieee80211_sub_if_data *sdata =
-		container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
+		container_of(work, struct ieee80211_sub_if_data, work);
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_if_managed *ifmgd;
 	struct sk_buff *skb;
@@ -1906,8 +1906,7 @@ static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
 		ieee80211_queue_work(&sdata->local->hw,
 			   &sdata->u.mgd.monitor_work);
 		/* and do all the other regular work too */
-		ieee80211_queue_work(&sdata->local->hw,
-			   &sdata->u.mgd.work);
+		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
 	}
 }
 
@@ -1922,7 +1921,6 @@ void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
 	 * time -- the code here is properly synchronised.
 	 */
 
-	cancel_work_sync(&ifmgd->work);
 	cancel_work_sync(&ifmgd->beacon_connection_loss_work);
 	if (del_timer_sync(&ifmgd->timer))
 		set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
@@ -1954,7 +1952,7 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
 	struct ieee80211_if_managed *ifmgd;
 
 	ifmgd = &sdata->u.mgd;
-	INIT_WORK(&ifmgd->work, ieee80211_sta_work);
+	INIT_WORK(&sdata->work, ieee80211_sta_work);
 	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
 	INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
 	INIT_WORK(&ifmgd->beacon_connection_loss_work,
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c
index e145a94..d287fde 100644
--- a/net/mac80211/pm.c
+++ b/net/mac80211/pm.c
@@ -64,6 +64,8 @@ int __ieee80211_suspend(struct ieee80211_hw *hw)
 
 	/* remove all interfaces */
 	list_for_each_entry(sdata, &local->interfaces, list) {
+		cancel_work_sync(&sdata->work);
+
 		switch(sdata->vif.type) {
 		case NL80211_IFTYPE_STATION:
 			ieee80211_sta_quiesce(sdata);