qcacld-3.0: Handle timer initialization gracefullly

Currently hdd_medium_assess_init() and hdd_medium_assess_deinit()
are not paired with event the events eSAP_START_BSS_EVENT and
eSAP_STOP_BSS_EVENT respectively. Hence multiple call traces
can be seen for eSAP_STOP_BSS_EVENT if eSAP_START_BSS_EVENT is
not invoked from __wlan_hdd_cfg80211_start_ap or SSR sequence.

To address this issue invoke hdd_medium_assess_init()
for eSAP_START_BSS_EVENT only from hdd_hostapd_sap_event_cb
if timer is not initialized already.

Change-Id: I361e371c8b59a226fe6cae97c6f66bec46eeeb0f
CRs-Fixed: 3349485

core/hdd/src/wlan_hdd_hostapd.c

@@ -2048,6 +2048,9 @@ QDF_STATUS hdd_hostapd_sap_event_cb(struct sap_event *sap_event,
 			      ap_ctx->operating_chan_freq,
 			      sap_config->ch_params.ch_width);
 
+		if (hdd_medium_access_state() == true)
+			hdd_medium_assess_init();
+
 		sap_config->ch_params = ap_ctx->sap_context->ch_params;
 		sap_config->sec_ch_freq = ap_ctx->sap_context->sec_ch_freq;
 
@@ -7896,7 +7899,6 @@ static int __wlan_hdd_cfg80211_start_ap(struct wiphy *wiphy,
 		}
 	}
 
-	hdd_medium_assess_init();
 	goto success;
 
 err_start_bss:

core/hdd/src/wlan_hdd_main.c

@@ -16465,9 +16465,6 @@ void wlan_hdd_start_sap(struct hdd_adapter *ap_adapter, bool reinit)
 	}
 	hdd_info("SAP Start Success");
 
-	if (reinit)
-		hdd_medium_assess_init();
-
 	wlansap_reset_sap_config_add_ie(sap_config, eUPDATE_IE_ALL);
 	set_bit(SOFTAP_BSS_STARTED, &ap_adapter->event_flags);
 	if (hostapd_state->bss_state == BSS_START) {

core/hdd/src/wlan_hdd_medium_assess.c

@@ -778,3 +778,10 @@ void hdd_medium_assess_deinit(void)
 		qdf_mc_timer_destroy(&hdd_medium_assess_timer);
 	}
 }
+
+bool hdd_medium_access_state(void)
+{
+	if (!timer_enable)
+		return true;
+	return false;
+}

core/hdd/src/wlan_hdd_medium_assess.h

@@ -117,6 +117,13 @@ void hdd_medium_assess_init(void);
  */
 void hdd_medium_assess_deinit(void);
 
+/**
+ * hdd_medium_access_state() - medium assess timer state
+ *
+ * Return: true if timer not initialized else false
+ */
+
+bool hdd_medium_access_state(void);
 /**
  * hdd_medium_assess_stop_timer() - medium assess reset and stop timer
  * @pdev_id: pdev id
@@ -137,6 +144,10 @@ void hdd_medium_assess_ssr_enable_flag(void);
 #define FEATURE_MEDIUM_ASSESS_VENDOR_EVENTS
 static inline void hdd_medium_assess_init(void) {}
 static inline void hdd_medium_assess_deinit(void) {}
+static inline bool hdd_medium_access_state(void)
+{
+	return false;
+}
 static inline void hdd_medium_assess_stop_timer(uint8_t pdev_id,
 						struct hdd_context *hdd_ctx) {}
 static inline void hdd_medium_assess_ssr_enable_flag(void) {}