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2024-05-10 61598093bbdd283a7edc367d900f223070ead8d2 
 kernel/drivers/hid/intel-ish-hid/ishtp/hbm.c
....@@ -1,17 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * ISHTP bus layer messages handling
34  *
45  * Copyright (c) 2003-2016, Intel Corporation.
5
- *
6
- * This program is free software; you can redistribute it and/or modify it
7
- * under the terms and conditions of the GNU General Public License,
8
- * version 2, as published by the Free Software Foundation.
9
- *
10
- * This program is distributed in the hope it will be useful, but WITHOUT
11
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13
- * more details.
14
- *
156  */
167 
178 #include <linux/export.h>
....@@ -136,19 +127,14 @@
136127 int ishtp_hbm_start_req(struct ishtp_device *dev)
137128 {
138129 	struct ishtp_msg_hdr hdr;
139
-	unsigned char data[128];
140
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
141
-	struct hbm_host_version_request *start_req;
142
-	const size_t len = sizeof(struct hbm_host_version_request);
130
+	struct hbm_host_version_request start_req = { 0 };
143131 
144
-	ishtp_hbm_hdr(ishtp_hdr, len);
132
+	ishtp_hbm_hdr(&hdr, sizeof(start_req));
145133 
146134 	/* host start message */
147
-	start_req = (struct hbm_host_version_request *)data;
148
-	memset(start_req, 0, len);
149
-	start_req->hbm_cmd = HOST_START_REQ_CMD;
150
-	start_req->host_version.major_version = HBM_MAJOR_VERSION;
151
-	start_req->host_version.minor_version = HBM_MINOR_VERSION;
135
+	start_req.hbm_cmd = HOST_START_REQ_CMD;
136
+	start_req.host_version.major_version = HBM_MAJOR_VERSION;
137
+	start_req.host_version.minor_version = HBM_MINOR_VERSION;
152138 
153139 	/*
154140 	 * (!) Response to HBM start may be so quick that this thread would get
....@@ -156,7 +142,7 @@
156142 	 * So set it at first, change back to ISHTP_HBM_IDLE upon failure
157143 	 */
158144 	dev->hbm_state = ISHTP_HBM_START;
159
-	if (ishtp_write_message(dev, ishtp_hdr, data)) {
145
+	if (ishtp_write_message(dev, &hdr, &start_req)) {
160146 		dev_err(dev->devc, "version message send failed\n");
161147 		dev->dev_state = ISHTP_DEV_RESETTING;
162148 		dev->hbm_state = ISHTP_HBM_IDLE;
....@@ -178,19 +164,13 @@
178164 void ishtp_hbm_enum_clients_req(struct ishtp_device *dev)
179165 {
180166 	struct ishtp_msg_hdr hdr;
181
-	unsigned char data[128];
182
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
183
-	struct hbm_host_enum_request *enum_req;
184
-	const size_t len = sizeof(struct hbm_host_enum_request);
167
+	struct hbm_host_enum_request enum_req = { 0 };
185168 
186169 	/* enumerate clients */
187
-	ishtp_hbm_hdr(ishtp_hdr, len);
170
+	ishtp_hbm_hdr(&hdr, sizeof(enum_req));
171
+	enum_req.hbm_cmd = HOST_ENUM_REQ_CMD;
188172 
189
-	enum_req = (struct hbm_host_enum_request *)data;
190
-	memset(enum_req, 0, len);
191
-	enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
192
-
193
-	if (ishtp_write_message(dev, ishtp_hdr, data)) {
173
+	if (ishtp_write_message(dev, &hdr, &enum_req)) {
194174 		dev->dev_state = ISHTP_DEV_RESETTING;
195175 		dev_err(dev->devc, "enumeration request send failed\n");
196176 		ish_hw_reset(dev);
....@@ -208,12 +188,8 @@
208188  */
209189 static int ishtp_hbm_prop_req(struct ishtp_device *dev)
210190 {
211
-
212191 	struct ishtp_msg_hdr hdr;
213
-	unsigned char data[128];
214
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
215
-	struct hbm_props_request *prop_req;
216
-	const size_t len = sizeof(struct hbm_props_request);
192
+	struct hbm_props_request prop_req = { 0 };
217193 	unsigned long next_client_index;
218194 	uint8_t client_num;
219195 
....@@ -237,15 +213,12 @@
237213 
238214 	dev->fw_clients[client_num].client_id = next_client_index;
239215 
240
-	ishtp_hbm_hdr(ishtp_hdr, len);
241
-	prop_req = (struct hbm_props_request *)data;
216
+	ishtp_hbm_hdr(&hdr, sizeof(prop_req));
242217 
243
-	memset(prop_req, 0, sizeof(struct hbm_props_request));
218
+	prop_req.hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
219
+	prop_req.address = next_client_index;
244220 
245
-	prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
246
-	prop_req->address = next_client_index;
247
-
248
-	if (ishtp_write_message(dev, ishtp_hdr, data)) {
221
+	if (ishtp_write_message(dev, &hdr, &prop_req)) {
249222 		dev->dev_state = ISHTP_DEV_RESETTING;
250223 		dev_err(dev->devc, "properties request send failed\n");
251224 		ish_hw_reset(dev);
....@@ -266,19 +239,14 @@
266239 static void ishtp_hbm_stop_req(struct ishtp_device *dev)
267240 {
268241 	struct ishtp_msg_hdr hdr;
269
-	unsigned char data[128];
270
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
271
-	struct hbm_host_stop_request *req;
272
-	const size_t len = sizeof(struct hbm_host_stop_request);
242
+	struct hbm_host_stop_request stop_req = { 0 } ;
273243 
274
-	ishtp_hbm_hdr(ishtp_hdr, len);
275
-	req = (struct hbm_host_stop_request *)data;
244
+	ishtp_hbm_hdr(&hdr, sizeof(stop_req));
276245 
277
-	memset(req, 0, sizeof(struct hbm_host_stop_request));
278
-	req->hbm_cmd = HOST_STOP_REQ_CMD;
279
-	req->reason = DRIVER_STOP_REQUEST;
246
+	stop_req.hbm_cmd = HOST_STOP_REQ_CMD;
247
+	stop_req.reason = DRIVER_STOP_REQUEST;
280248 
281
-	ishtp_write_message(dev, ishtp_hdr, data);
249
+	ishtp_write_message(dev, &hdr, &stop_req);
282250 }
283251 
284252 /**
....@@ -294,15 +262,15 @@
294262 				  struct ishtp_cl *cl)
295263 {
296264 	struct ishtp_msg_hdr hdr;
297
-	unsigned char data[128];
298
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
299
-	const size_t len = sizeof(struct hbm_flow_control);
265
+	struct hbm_flow_control flow_ctrl;
266
+	const size_t len = sizeof(flow_ctrl);
300267 	int	rv;
301268 	unsigned long	flags;
302269 
303270 	spin_lock_irqsave(&cl->fc_spinlock, flags);
304
-	ishtp_hbm_hdr(ishtp_hdr, len);
305
-	ishtp_hbm_cl_hdr(cl, ISHTP_FLOW_CONTROL_CMD, data, len);
271
+
272
+	ishtp_hbm_hdr(&hdr, len);
273
+	ishtp_hbm_cl_hdr(cl, ISHTP_FLOW_CONTROL_CMD, &flow_ctrl, len);
306274 
307275 	/*
308276 	 * Sync possible race when RB recycle and packet receive paths
....@@ -315,7 +283,7 @@
315283 
316284 	cl->recv_msg_num_frags = 0;
317285 
318
-	rv = ishtp_write_message(dev, ishtp_hdr, data);
286
+	rv = ishtp_write_message(dev, &hdr, &flow_ctrl);
319287 	if (!rv) {
320288 		++cl->out_flow_ctrl_creds;
321289 		++cl->out_flow_ctrl_cnt;
....@@ -345,14 +313,13 @@
345313 int ishtp_hbm_cl_disconnect_req(struct ishtp_device *dev, struct ishtp_cl *cl)
346314 {
347315 	struct ishtp_msg_hdr hdr;
348
-	unsigned char data[128];
349
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
350
-	const size_t len = sizeof(struct hbm_client_connect_request);
316
+	struct hbm_client_connect_request disconn_req;
317
+	const size_t len = sizeof(disconn_req);
351318 
352
-	ishtp_hbm_hdr(ishtp_hdr, len);
353
-	ishtp_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, data, len);
319
+	ishtp_hbm_hdr(&hdr, len);
320
+	ishtp_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, &disconn_req, len);
354321 
355
-	return ishtp_write_message(dev, ishtp_hdr, data);
322
+	return ishtp_write_message(dev, &hdr, &disconn_req);
356323 }
357324 
358325 /**
....@@ -391,14 +358,13 @@
391358 int ishtp_hbm_cl_connect_req(struct ishtp_device *dev, struct ishtp_cl *cl)
392359 {
393360 	struct ishtp_msg_hdr hdr;
394
-	unsigned char data[128];
395
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
396
-	const size_t len = sizeof(struct hbm_client_connect_request);
361
+	struct hbm_client_connect_request conn_req;
362
+	const size_t len = sizeof(conn_req);
397363 
398
-	ishtp_hbm_hdr(ishtp_hdr, len);
399
-	ishtp_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, data, len);
364
+	ishtp_hbm_hdr(&hdr, len);
365
+	ishtp_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, &conn_req, len);
400366 
401
-	return ishtp_write_message(dev, ishtp_hdr, data);
367
+	return ishtp_write_message(dev, &hdr, &conn_req);
402368 }
403369 
404370 /**
....@@ -436,7 +402,7 @@
436402  * @dev: ISHTP device instance
437403  * @disconnect_req: disconnect request structure
438404  *
439
- * Disconnect request bus message from the fw. Send diconnect response.
405
+ * Disconnect request bus message from the fw. Send disconnect response.
440406  */
441407 static void ishtp_hbm_fw_disconnect_req(struct ishtp_device *dev,
442408 	struct hbm_client_connect_request *disconnect_req)