Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/sound/soc/intel/common/sst-ipc.h b/sound/soc/intel/common/sst-ipc.h
index 7ed42a6..08c4831 100644
--- a/sound/soc/intel/common/sst-ipc.h
+++ b/sound/soc/intel/common/sst-ipc.h
@@ -1,17 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Intel SST generic IPC Support
  *
  * Copyright (C) 2015, Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  */
 
 #ifndef __SST_GENERIC_IPC_H
@@ -26,15 +17,16 @@
 
 #define IPC_MAX_MAILBOX_BYTES	256
 
+struct sst_ipc_message {
+	u64 header;
+	void *data;
+	size_t size;
+};
+
 struct ipc_message {
 	struct list_head list;
-	u64 header;
-
-	/* direction wrt host CPU */
-	char *tx_data;
-	size_t tx_size;
-	char *rx_data;
-	size_t rx_size;
+	struct sst_ipc_message tx;
+	struct sst_ipc_message rx;
 
 	wait_queue_head_t waitq;
 	bool pending;
@@ -44,6 +36,7 @@
 };
 
 struct sst_generic_ipc;
+struct sst_dsp;
 
 struct sst_plat_ipc_ops {
 	void (*tx_msg)(struct sst_generic_ipc *, struct ipc_message *);
@@ -74,14 +67,14 @@
 	struct sst_plat_ipc_ops ops;
 };
 
-int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc, u64 header,
-	void *tx_data, size_t tx_bytes, void *rx_data, size_t rx_bytes);
+int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc,
+	struct sst_ipc_message request, struct sst_ipc_message *reply);
 
-int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc, u64 header,
-	void *tx_data, size_t tx_bytes);
+int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc,
+	struct sst_ipc_message request);
 
-int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc, u64 header,
-	void *tx_data, size_t tx_bytes, void *rx_data, size_t rx_bytes);
+int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc,
+	struct sst_ipc_message request, struct sst_ipc_message *reply);
 
 struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc,
 	u64 header);