qcacld-3.0: Clean up cfg80211 del_station for Kernel upgrade

Commit: 89c771e ("cfg80211: Convert del_station() callback to
use a param struct")
Commit: 9885686 ("cfg80211: Specify frame and reason code for
NL80211_CMD_DEL_STATION")

These two commits have been merged in Kernel 3.19.

Add a kernel version macro to support this.
And refactor the inclusion of CFG80211_DEL_STA_V2 by adding a
helper function to clean it up, that way we can keep the flag
only in wlan_hdd_cfg80211.h/c as this is the cfg80211 interface
related changes.

Change-Id: I811065b7fa1cf2aee68cfe63c5cf78c2270e5af7
CRs-fixed: 963651

core/cds/src/cds_concurrency.c

@@ -7286,9 +7286,6 @@ void cds_restart_sap(hdd_adapter_t *ap_adapter)
 	QDF_STATUS qdf_status;
 	QDF_STATUS qdf_status;
 	hdd_context_t *hdd_ctx = WLAN_HDD_GET_CTX(ap_adapter);
-#ifdef CFG80211_DEL_STA_V2
-	struct tagCsrDelStaParams delStaParams;
-#endif
 	tsap_Config_t *sap_config;
 	void *sap_ctx;
 
@@ -7298,17 +7295,7 @@ void cds_restart_sap(hdd_adapter_t *ap_adapter)
 
 	mutex_lock(&hdd_ctx->sap_lock);
 	if (test_bit(SOFTAP_BSS_STARTED, &ap_adapter->event_flags)) {
-#ifdef CFG80211_DEL_STA_V2
-		delStaParams.mac = NULL;
-		delStaParams.subtype = SIR_MAC_MGMT_DEAUTH >> 4;
-		delStaParams.reason_code = eCsrForcedDeauthSta;
-		wlan_hdd_cfg80211_del_station(ap_adapter->wdev.wiphy,
-				ap_adapter->dev,
-				&delStaParams);
-#else
-		wlan_hdd_cfg80211_del_station(ap_adapter->wdev.wiphy,
-				ap_adapter->dev, NULL);
-#endif
+		wlan_hdd_del_station(ap_adapter);
 		hdd_cleanup_actionframe(hdd_ctx, ap_adapter);
 		hostapd_state = WLAN_HDD_GET_HOSTAP_STATE_PTR(ap_adapter);
 		qdf_event_reset(&hostapd_state->qdf_stop_bss_event);

core/hdd/src/wlan_hdd_cfg80211.c

@@ -10004,7 +10004,31 @@ fn_end:
 	return 0;
 }
 
-#ifdef CFG80211_DEL_STA_V2
+#if defined(USE_CFG80211_DEL_STA_V2)
+/**
+ * wlan_hdd_del_station() - delete station wrapper
+ * @adapter: pointer to the hdd adapter
+ *
+ * Return: None
+ */
+void wlan_hdd_del_station(hdd_adapter_t *adapter)
+{
+	struct station_del_parameters del_sta;
+	del_sta.mac = NULL;
+	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);
+}
+#else
+void wlan_hdd_del_station(hdd_adapter_t *adapter)
+{
+	wlan_hdd_cfg80211_del_station(adapter->wdev.wiphy, adapter->dev, NULL);
+}
+#endif
+
+#if defined(USE_CFG80211_DEL_STA_V2)
 /**
  * wlan_hdd_cfg80211_del_station() - delete station v2
  * @wiphy: Pointer to wiphy
@@ -10038,9 +10062,9 @@ int wlan_hdd_cfg80211_del_station(struct wiphy *wiphy,
 	struct tagCsrDelStaParams delStaParams;
 
 	cds_ssr_protect(__func__);
-#ifdef CFG80211_DEL_STA_V2
+#if defined(USE_CFG80211_DEL_STA_V2)
 	if (NULL == param) {
-		hddLog(LOGE, FL("Invalid argumet passed"));
+		hdd_err("Invalid argument passed");
 		return -EINVAL;
 	}
 	wlansap_populate_del_sta_params(param->mac, param->reason_code,

core/hdd/src/wlan_hdd_cfg80211.h

@@ -106,6 +106,10 @@
 #define CHANNEL_SWITCH_SUPPORTED
 #endif
 
+#if defined(CFG80211_DEL_STA_V2) || (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)) || defined(WITH_BACKPORTS)
+#define USE_CFG80211_DEL_STA_V2
+#endif
+
 /**
  * typedef struct qcom_ie_age - age ie
  *
@@ -2324,7 +2328,9 @@ void hdd_select_cbmode(hdd_adapter_t *pAdapter, uint8_t operationChannel);
 uint8_t *wlan_hdd_cfg80211_get_ie_ptr(const uint8_t *ies_ptr, int length,
 				      uint8_t eid);
 
-#ifdef CFG80211_DEL_STA_V2
+void wlan_hdd_del_station(hdd_adapter_t *adapter);
+
+#if defined(USE_CFG80211_DEL_STA_V2)
 int wlan_hdd_cfg80211_del_station(struct wiphy *wiphy,
 				  struct net_device *dev,
 				  struct station_del_parameters *param);
@@ -2338,7 +2344,8 @@ int wlan_hdd_cfg80211_del_station(struct wiphy *wiphy,
 				  struct net_device *dev,
 				  uint8_t *mac);
 #endif
-#endif
+#endif /* USE_CFG80211_DEL_STA_V2 */
+
 
 #if  defined(QCA_WIFI_FTM)     && defined(CONFIG_NL80211_TESTMODE)
 void wlan_hdd_testmode_rx_event(void *buf, size_t buf_len);

core/hdd/src/wlan_hdd_main.c

@@ -6568,9 +6568,6 @@ void wlan_hdd_stop_sap(hdd_adapter_t *ap_adapter)
 	hdd_hostapd_state_t *hostapd_state;
 	QDF_STATUS qdf_status;
 	hdd_context_t *hdd_ctx;
-#ifdef CFG80211_DEL_STA_V2
-	struct station_del_parameters delStaParams;
-#endif
 
 	if (NULL == ap_adapter) {
 		hddLog(QDF_TRACE_LEVEL_ERROR,
@@ -6587,18 +6584,7 @@ void wlan_hdd_stop_sap(hdd_adapter_t *ap_adapter)
 	}
 	mutex_lock(&hdd_ctx->sap_lock);
 	if (test_bit(SOFTAP_BSS_STARTED, &ap_adapter->event_flags)) {
-#ifdef CFG80211_DEL_STA_V2
-		delStaParams.mac = NULL;
-		delStaParams.subtype = SIR_MAC_MGMT_DEAUTH >> 4;
-		delStaParams.reason_code = eCsrForcedDeauthSta;
-		wlan_hdd_cfg80211_del_station(ap_adapter->wdev.wiphy,
-				ap_adapter->dev,
-				&delStaParams);
-#else
-		wlan_hdd_cfg80211_del_station(ap_adapter->wdev.wiphy,
-				ap_adapter->dev,
-				NULL);
-#endif
+		wlan_hdd_del_station(ap_adapter);
 		hdd_cleanup_actionframe(hdd_ctx, ap_adapter);
 		hostapd_state = WLAN_HDD_GET_HOSTAP_STATE_PTR(ap_adapter);
 		hddLog(QDF_TRACE_LEVEL_INFO_HIGH,