qcacld-3.0: Deregister sap clients before stop bss

In stop bss write to reo remap control registers happen
after pcie power collapse is enabled. As pcie power collapse
is enabled sometimes reo remap register write is not going
through. For sta + sap concurrency this is resulting in NOC
error when other sta interface connecting to AP after stop bss.
Disable autonomy or reo remap registers to sw host destination
rings happen as part of last sap client deregistration. In this
change deregister sap clients before stop bss.

Change-Id: Ic84a1d45b5b376ec8ad28a05246efc4252b390ab
CRs-fixed: 2643092

core/hdd/src/wlan_hdd_cfg80211.c

@@ -20867,9 +20867,9 @@ fn_end:
  * wlan_hdd_del_station() - delete station wrapper
  * @adapter: pointer to the hdd adapter
  *
- * Return: None
+ * Return: Errno
  */
-void wlan_hdd_del_station(struct hdd_adapter *adapter)
+int wlan_hdd_del_station(struct hdd_adapter *adapter)
 {
 	struct station_del_parameters del_sta;
 
@@ -20877,13 +20877,14 @@ void wlan_hdd_del_station(struct hdd_adapter *adapter)
 	del_sta.subtype = SIR_MAC_MGMT_DEAUTH >> 4;
 	del_sta.reason_code = eCsrForcedDeauthSta;
 
-	wlan_hdd_cfg80211_del_station(adapter->wdev.wiphy, adapter->dev,
-				      &del_sta);
+	return wlan_hdd_cfg80211_del_station(adapter->wdev.wiphy,
+					     adapter->dev, &del_sta);
 }
 #else
-void wlan_hdd_del_station(struct hdd_adapter *adapter)
+int wlan_hdd_del_station(struct hdd_adapter *adapter)
 {
-	wlan_hdd_cfg80211_del_station(adapter->wdev.wiphy, adapter->dev, NULL);
+	return wlan_hdd_cfg80211_del_station(adapter->wdev.wiphy,
+					     adapter->dev, NULL);
 }
 #endif
 

core/hdd/src/wlan_hdd_cfg80211.h

@@ -437,7 +437,7 @@ void hdd_select_cbmode(struct hdd_adapter *adapter, uint32_t oper_freq,
  * Return: true or false based on findings
  */
 bool wlan_hdd_is_ap_supports_immediate_power_save(uint8_t *ies, int length);
-void wlan_hdd_del_station(struct hdd_adapter *adapter);
+int wlan_hdd_del_station(struct hdd_adapter *adapter);
 
 #if defined(USE_CFG80211_DEL_STA_V2)
 int wlan_hdd_cfg80211_del_station(struct wiphy *wiphy,

core/hdd/src/wlan_hdd_main.c

@@ -6420,8 +6420,10 @@ QDF_STATUS hdd_stop_adapter(struct hdd_context *hdd_ctx,
 	case QDF_SAP_MODE:
 		wlan_hdd_scan_abort(adapter);
 		/* Diassociate with all the peers before stop ap post */
-		if (test_bit(SOFTAP_BSS_STARTED, &adapter->event_flags))
-			wlan_hdd_del_station(adapter);
+		if (test_bit(SOFTAP_BSS_STARTED, &adapter->event_flags)) {
+			if (wlan_hdd_del_station(adapter))
+				hdd_sap_indicate_disconnect_for_sta(adapter);
+		}
 		status = wlan_hdd_flush_pmksa_cache(adapter);
 		if (QDF_IS_STATUS_ERROR(status))
 			hdd_debug("Cannot flush PMKIDCache");