mac80211: further simplify ieee80211_bss_info_change_notify

The special case in the function isn't really needed,
instead make the suspend code a bit better and also
easier to understand and move the warning into the
driver op wrapper inline.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/driver-ops.h

@@ -207,6 +207,12 @@ static inline void drv_bss_info_changed(struct ieee80211_local *local,
 {
 	might_sleep();
 
+	WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
+				BSS_CHANGED_BEACON_ENABLED) &&
+		     sdata->vif.type != NL80211_IFTYPE_AP &&
+		     sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+		     sdata->vif.type != NL80211_IFTYPE_MESH_POINT);
+
 	check_sdata_in_driver(sdata);
 
 	trace_drv_bss_info_changed(local, sdata, info, changed);

net/mac80211/main.c

@@ -231,20 +231,6 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 		return;
 	}
 
-	switch (sdata->vif.type) {
-	case NL80211_IFTYPE_AP:
-	case NL80211_IFTYPE_ADHOC:
-	case NL80211_IFTYPE_WDS:
-	case NL80211_IFTYPE_MESH_POINT:
-		break;
-	default:
-		/* do not warn to simplify caller in scan.c */
-		changed &= ~BSS_CHANGED_BEACON_ENABLED;
-		if (WARN_ON(changed & BSS_CHANGED_BEACON))
-			return;
-		break;
-	}
-
 	drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 }
 

net/mac80211/pm.c

@@ -121,7 +121,7 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 
 	/* remove all interfaces */
 	list_for_each_entry(sdata, &local->interfaces, list) {
-		u32 changed = BSS_CHANGED_BEACON_ENABLED;
+		u32 changed = 0;
 
 		if (!ieee80211_sdata_running(sdata))
 			continue;
@@ -136,14 +136,19 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 				changed = BSS_CHANGED_ASSOC |
 					  BSS_CHANGED_BSSID |
 					  BSS_CHANGED_IDLE;
-			else
-				changed = 0;
-			/* fall through */
+			break;
+		case NL80211_IFTYPE_AP:
+		case NL80211_IFTYPE_ADHOC:
+		case NL80211_IFTYPE_MESH_POINT:
+			if (sdata->vif.bss_conf.enable_beacon)
+				changed = BSS_CHANGED_BEACON_ENABLED;
+			break;
 		default:
-			ieee80211_quiesce(sdata);
 			break;
 		}
 
+		ieee80211_quiesce(sdata);
+
 		sdata->suspend_bss_conf = sdata->vif.bss_conf;
 		memset(&sdata->vif.bss_conf, 0, sizeof(sdata->vif.bss_conf));
 		sdata->vif.bss_conf.idle = true;