qcacld-3.0: Avoid setting hw_mode to SMM when already in SMM

Whenever there is session disconnection, the device sets its
hw_mode to SMM (Single MAC Mode) if the current connections
are not using DBS mode. Thus, if the device is in SMM, it
still sets its hw_mode to SMM after session disconnection.

The enhancement is to check the if the device is already in
SMM, then avoid setting again to SMM.

Change-Id: I4ebb9b6d992e65667a06b3e68d322435c7ec2968
CRs-Fixed: 1076844

core/cds/src/cds_concurrency.c

@@ -3651,10 +3651,22 @@ enum cds_conc_next_action cds_need_opportunistic_upgrade(void)
 	uint32_t conn_index;
 	enum cds_conc_next_action upgrade = CDS_NOP;
 	uint8_t mac = 0;
+	struct sir_hw_mode_params hw_mode;
+	QDF_STATUS status = QDF_STATUS_E_FAILURE;
 
 	if (wma_is_hw_dbs_capable() == false) {
 		cds_err("driver isn't dbs capable, no further action needed");
-		return upgrade;
+		goto done;
+	}
+
+	status = wma_get_current_hw_mode(&hw_mode);
+	if (!QDF_IS_STATUS_SUCCESS(status)) {
+		cds_err("wma_get_current_hw_mode failed");
+		goto done;
+	}
+	if (!hw_mode.dbs_cap) {
+		cds_info("current HW mode is non-DBS capable");
+		goto done;
 	}
 
 	/* Are both mac's still in use */