qcacld-3.0: Check whether SAP need restart

If there is no STA/P2P CLI on same MAC of SAP/P2P GO,
SAP/P2P Go needn't switch channel to force scc.

Change-Id: I529a57f73f529e41b8c0097fccabbe3e0e516993
CRs-Fixed: 2643106

components/cmn_services/policy_mgr/inc/wlan_policy_mgr_api.h

@@ -3347,4 +3347,19 @@ bool policy_mgr_dump_channel_list(uint32_t len,
 				  uint32_t *pcl_channels,
 				  uint8_t *pcl_weight);
 
+/**
+ * policy_mgr_is_restart_sap_required() - check whether sap need restart
+ * @psoc: psoc pointer
+ * @freq: sap current freq
+ * @scc_mode: mcc to scc switch mode
+ *
+ * If there is no STA/P2P CLI on same MAC of SAP/P2P GO,
+ * SAP/P2P Go needn't switch channel to force scc.
+ *
+ * Return: True or false
+ */
+bool policy_mgr_is_restart_sap_required(struct wlan_objmgr_psoc *psoc,
+					qdf_freq_t freq,
+					tQDF_MCC_TO_SCC_SWITCH_MODE scc_mode);
+
 #endif /* __WLAN_POLICY_MGR_API_H */

components/cmn_services/policy_mgr/src/wlan_policy_mgr_get_set_utils.c

@@ -4318,3 +4318,49 @@ bool policy_mgr_get_5g_scc_prefer(
 
 	return pm_ctx->cfg.prefer_5g_scc_to_dbs & (1 << mode);
 }
+
+bool policy_mgr_is_restart_sap_required(struct wlan_objmgr_psoc *psoc,
+					qdf_freq_t freq,
+					tQDF_MCC_TO_SCC_SWITCH_MODE scc_mode)
+{
+	uint32_t i;
+	bool restart_required = false;
+	bool is_sta_p2p_cli;
+	bool is_same_band;
+	struct policy_mgr_psoc_priv_obj *pm_ctx;
+	struct policy_mgr_conc_connection_info *connection;
+
+	pm_ctx = policy_mgr_get_context(psoc);
+	if (!pm_ctx) {
+		policy_mgr_err("Invalid psoc");
+		return false;
+	}
+	if (scc_mode == QDF_MCC_TO_SCC_SWITCH_DISABLE) {
+		policy_mgr_debug("No scc required");
+		return false;
+	}
+
+	qdf_mutex_acquire(&pm_ctx->qdf_conc_list_lock);
+	connection = pm_conc_connection_list;
+	for (i = 0; i < MAX_NUMBER_OF_CONC_CONNECTIONS; i++) {
+		is_sta_p2p_cli =
+			connection[i].in_use &&
+			(connection[i].mode == PM_STA_MODE ||
+			connection[i].mode == PM_P2P_CLIENT_MODE);
+
+		is_same_band =
+			wlan_reg_is_24ghz_ch_freq(freq) ==
+			wlan_reg_is_24ghz_ch_freq(connection[i].freq) &&
+			connection[i].freq != freq;
+
+		if (is_sta_p2p_cli &&
+		    (is_same_band || !policy_mgr_is_dbs_enable(psoc))) {
+			restart_required = true;
+			break;
+		}
+	}
+	qdf_mutex_release(&pm_ctx->qdf_conc_list_lock);
+
+	return restart_required;
+}
+

core/hdd/src/wlan_hdd_hostapd.c

@@ -3189,8 +3189,16 @@ QDF_STATUS wlan_hdd_get_channel_for_sap_restart(
 		hdd_debug("p2p go no scc required");
 		return QDF_STATUS_E_FAILURE;
 	}
+
 	ucfg_policy_mgr_get_mcc_scc_switch(hdd_ctx->psoc,
 					   &mcc_to_scc_switch);
+	if (!policy_mgr_is_restart_sap_required(hdd_ctx->psoc, *ch_freq,
+						mcc_to_scc_switch)) {
+		wlansap_context_put(sap_context);
+		hdd_debug("SAP needn't restart");
+		return QDF_STATUS_E_FAILURE;
+	}
+
 	/*
 	 * Check if STA's channel is DFS or passive or part of LTE avoided
 	 * channel list. In that case move SAP to other band if DBS is