dsp: update EC reference port only if channels are configured

ADM open is failed due to payload size not getting updated
with ec reference size. Update EC reference port only if
EC reference channels are configured.

Change-Id: Ic2dd6a3cf805c1ea40d71d0b62b6e867167d169e
Signed-off-by: Surendar Karka <skarka@codeaurora.org>

dsp/q6adm.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
  */
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -2943,9 +2943,18 @@ int adm_open(int port_id, int path, int rate, int channel_mode, int topology,
 			open_v8.endpoint_id_2 = 0xFFFF;
 			open_v8.endpoint_id_3 = 0xFFFF;
 
-			if (this_adm.ec_ref_rx && (path != ADM_PATH_PLAYBACK)) {
-				open_v8.endpoint_id_2 = this_adm.ec_ref_rx;
-				this_adm.ec_ref_rx = -1;
+			if ((this_adm.ec_ref_rx != -1) &&
+			    (path != ADM_PATH_PLAYBACK)) {
+				if (this_adm.num_ec_ref_rx_chans != 0) {
+					open_v8.endpoint_id_2 =
+						this_adm.ec_ref_rx;
+					this_adm.ec_ref_rx = -1;
+				} else {
+					pr_err("%s: EC channels not set %d\n",
+						__func__,
+						this_adm.num_ec_ref_rx_chans);
+					return -EINVAL;
+				}
 			}
 
 			open_v8.topology_id = topology;