Revert "cfg80211: export interface stopping function"

This reverts commit f04c22033c.

The commit "cfg80211: export interface stopping function" exports a new
cfg80211_stop_iface() function, intended for driver internal interface
combination management and channel switching. The new function is used
by commit "cfg80211/mac80211: disconnect on suspend" which is reverted
in order to avoid the disconnection while going to suspend. Hence the
commit "cfg80211: export interface stopping function" should be reverted.

CRs-Fixed: 540571
Signed-off-by: Ahmad Kholaif <akholaif@codeaurora.org>

include/net/cfg80211.h

@@ -5298,21 +5298,6 @@ int cfg80211_iter_combinations(struct wiphy *wiphy,
 					    void *data),
 			       void *data);
 
-/*
- * cfg80211_stop_iface - trigger interface disconnection
- *
- * @wiphy: the wiphy
- * @wdev: wireless device
- * @gfp: context flags
- *
- * Trigger interface to be stopped as if AP was stopped, IBSS/mesh left, STA
- * disconnected.
- *
- * Note: This doesn't need any locks and is asynchronous.
- */
-void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
-			 gfp_t gfp);
-
 /**
  * cfg80211_shutdown_all_interfaces - shut down all interfaces for a wiphy
  * @wiphy: the wiphy to shut down

net/wireless/ap.c

@@ -6,8 +6,8 @@
 #include "rdev-ops.h"
 
 
-int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
+static int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
-		       struct net_device *dev, bool notify)
+                             struct net_device *dev, bool notify)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;

net/wireless/core.c

@@ -887,25 +887,24 @@ void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 		rdev->num_running_monitor_ifaces += num;
 }
 
-void __cfg80211_leave(struct cfg80211_registered_device *rdev,
+void cfg80211_leave(struct cfg80211_registered_device *rdev,
-		      struct wireless_dev *wdev)
+                   struct wireless_dev *wdev)
 {
 	struct net_device *dev = wdev->netdev;
 	struct cfg80211_sched_scan_request *sched_scan_req;
 
 	ASSERT_RTNL();
-	ASSERT_WDEV_LOCK(wdev);
 
 	switch (wdev->iftype) {
 	case NL80211_IFTYPE_ADHOC:
-		__cfg80211_leave_ibss(rdev, dev, true);
+		cfg80211_leave_ibss(rdev, dev, true);
 		break;
 	case NL80211_IFTYPE_P2P_CLIENT:
 	case NL80211_IFTYPE_STATION:
 		sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
 		if (sched_scan_req && dev == sched_scan_req->dev)
 			__cfg80211_stop_sched_scan(rdev, false);
-
+              wdev_lock(wdev);
 #ifdef CONFIG_CFG80211_WEXT
 		kfree(wdev->wext.ie);
 		wdev->wext.ie = NULL;
@@ -914,13 +913,14 @@ void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 #endif
 		cfg80211_disconnect(rdev, dev,
 				    WLAN_REASON_DEAUTH_LEAVING, true);
+              wdev_unlock(wdev);
 		break;
 	case NL80211_IFTYPE_MESH_POINT:
-		__cfg80211_leave_mesh(rdev, dev);
+              cfg80211_leave_mesh(rdev, dev);
 		break;
 	case NL80211_IFTYPE_AP:
 	case NL80211_IFTYPE_P2P_GO:
-		__cfg80211_stop_ap(rdev, dev, true);
+              cfg80211_stop_ap(rdev, dev, true);
 		break;
 	case NL80211_IFTYPE_OCB:
 		__cfg80211_leave_ocb(rdev, dev);
@@ -942,36 +942,6 @@ void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 	}
 }
 
-void cfg80211_leave(struct cfg80211_registered_device *rdev,
-		    struct wireless_dev *wdev)
-{
-	wdev_lock(wdev);
-	__cfg80211_leave(rdev, wdev);
-	wdev_unlock(wdev);
-}
-
-void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
-			 gfp_t gfp)
-{
-	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
-	struct cfg80211_event *ev;
-	unsigned long flags;
-
-	trace_cfg80211_stop_iface(wiphy, wdev);
-
-	ev = kzalloc(sizeof(*ev), gfp);
-	if (!ev)
-		return;
-
-	ev->type = EVENT_STOPPED;
-
-	spin_lock_irqsave(&wdev->event_lock, flags);
-	list_add_tail(&ev->list, &wdev->event_list);
-	spin_unlock_irqrestore(&wdev->event_lock, flags);
-	queue_work(cfg80211_wq, &rdev->event_work);
-}
-EXPORT_SYMBOL(cfg80211_stop_iface);
-
 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
 					 unsigned long state, void *ptr)
 {

net/wireless/core.h

@@ -200,7 +200,6 @@ enum cfg80211_event_type {
 	EVENT_ROAMED,
 	EVENT_DISCONNECTED,
 	EVENT_IBSS_JOINED,
-	EVENT_STOPPED,
 };
 
 struct cfg80211_event {
@@ -298,8 +297,6 @@ int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 		       struct net_device *dev,
 		       struct mesh_setup *setup,
 		       const struct mesh_config *conf);
-int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
-			  struct net_device *dev);
 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 			struct net_device *dev);
 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
@@ -319,8 +316,6 @@ int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 		       struct net_device *dev);
 
 /* AP */
-int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
-		       struct net_device *dev, bool notify);
 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 		     struct net_device *dev, bool notify);
 
@@ -475,8 +470,6 @@ int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 			       enum nl80211_iftype iftype, int num);
 
-void __cfg80211_leave(struct cfg80211_registered_device *rdev,
-		      struct wireless_dev *wdev);
 void cfg80211_leave(struct cfg80211_registered_device *rdev,
 		    struct wireless_dev *wdev);
 

net/wireless/mesh.c

@@ -238,8 +238,8 @@ int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 	return 0;
 }
 
-int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
+static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
-			  struct net_device *dev)
+                                struct net_device *dev)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;

net/wireless/trace.h

@@ -2803,21 +2803,6 @@ TRACE_EVENT(cfg80211_ft_event,
 		  WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(target_ap))
 );
 
-TRACE_EVENT(cfg80211_stop_iface,
-	TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev),
-	TP_ARGS(wiphy, wdev),
-	TP_STRUCT__entry(
-		WIPHY_ENTRY
-		WDEV_ENTRY
-	),
-	TP_fast_assign(
-		WIPHY_ASSIGN;
-		WDEV_ASSIGN;
-	),
-	TP_printk(WIPHY_PR_FMT ", " WDEV_PR_FMT,
-		  WIPHY_PR_ARG, WDEV_PR_ARG)
-);
-
 #endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
 
 #undef TRACE_INCLUDE_PATH

net/wireless/util.c

@@ -894,9 +894,6 @@ void cfg80211_process_wdev_events(struct wireless_dev *wdev)
 			__cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
 					       ev->ij.channel);
 			break;
-		case EVENT_STOPPED:
-			__cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
-			break;
 		}
 		wdev_unlock(wdev);