1083 	struct smu_private *pp;  in smu_open()  local
1086 	pp = kzalloc(sizeof(struct smu_private), GFP_KERNEL);  in smu_open()
1087 	if (pp == 0)  in smu_open()
1089 	spin_lock_init(&pp->lock);  in smu_open()
1090 	pp->mode = smu_file_commands;  in smu_open()
1091 	init_waitqueue_head(&pp->wait);  in smu_open()
1095 	list_add(&pp->list, &smu_clist);  in smu_open()
1097 	file->private_data = pp;  in smu_open()
1106 	struct smu_private *pp = misc;  in smu_user_cmd_done()  local
1108 	wake_up_all(&pp->wait);  in smu_user_cmd_done()
1115 	struct smu_private *pp = file->private_data;  in smu_write()  local
1120 	if (pp->busy)  in smu_write()
1125 		pp->mode = smu_file_events;  in smu_write()
1137 	else if (pp->mode != smu_file_commands)  in smu_write()
1142 	spin_lock_irqsave(&pp->lock, flags);  in smu_write()
1143 	if (pp->busy) {  in smu_write()
1144 		spin_unlock_irqrestore(&pp->lock, flags);  in smu_write()
1147 	pp->busy = 1;  in smu_write()
1148 	pp->cmd.status = 1;  in smu_write()
1149 	spin_unlock_irqrestore(&pp->lock, flags);  in smu_write()
1151 	if (copy_from_user(pp->buffer, buf + sizeof(hdr), hdr.data_len)) {  in smu_write()
1152 		pp->busy = 0;  in smu_write()
1156 	pp->cmd.cmd = hdr.cmd;  in smu_write()
1157 	pp->cmd.data_len = hdr.data_len;  in smu_write()
1158 	pp->cmd.reply_len = SMU_MAX_DATA;  in smu_write()
1159 	pp->cmd.data_buf = pp->buffer;  in smu_write()
1160 	pp->cmd.reply_buf = pp->buffer;  in smu_write()
1161 	pp->cmd.done = smu_user_cmd_done;  in smu_write()
1162 	pp->cmd.misc = pp;  in smu_write()
1163 	rc = smu_queue_cmd(&pp->cmd);  in smu_write()
1170 static ssize_t smu_read_command(struct file *file, struct smu_private *pp,  in smu_read_command()  argument
1178 	if (!pp->busy)  in smu_read_command()
1182 	spin_lock_irqsave(&pp->lock, flags);  in smu_read_command()
1183 	if (pp->cmd.status == 1) {  in smu_read_command()
1185 			spin_unlock_irqrestore(&pp->lock, flags);  in smu_read_command()
1188 		add_wait_queue(&pp->wait, &wait);  in smu_read_command()
1192 			if (pp->cmd.status != 1)  in smu_read_command()
1197 			spin_unlock_irqrestore(&pp->lock, flags);  in smu_read_command()
1199 			spin_lock_irqsave(&pp->lock, flags);  in smu_read_command()
1202 		remove_wait_queue(&pp->wait, &wait);  in smu_read_command()
1204 	spin_unlock_irqrestore(&pp->lock, flags);  in smu_read_command()
1207 	if (pp->cmd.status != 0)  in smu_read_command()
1208 		pp->cmd.reply_len = 0;  in smu_read_command()
1209 	size = sizeof(hdr) + pp->cmd.reply_len;  in smu_read_command()
1213 	hdr.status = pp->cmd.status;  in smu_read_command()
1214 	hdr.reply_len = pp->cmd.reply_len;  in smu_read_command()
1218 	if (size && copy_to_user(buf + sizeof(hdr), pp->buffer, size))  in smu_read_command()
1220 	pp->busy = 0;  in smu_read_command()
1226 static ssize_t smu_read_events(struct file *file, struct smu_private *pp,  in smu_read_events()  argument
1238 	struct smu_private *pp = file->private_data;  in smu_read()  local
1240 	if (pp->mode == smu_file_commands)  in smu_read()
1241 		return smu_read_command(file, pp, buf, count);  in smu_read()
1242 	if (pp->mode == smu_file_events)  in smu_read()
1243 		return smu_read_events(file, pp, buf, count);  in smu_read()
1250 	struct smu_private *pp = file->private_data;  in smu_fpoll()  local
1254 	if (pp == 0)  in smu_fpoll()
1257 	if (pp->mode == smu_file_commands) {  in smu_fpoll()
1258 		poll_wait(file, &pp->wait, wait);  in smu_fpoll()
1260 		spin_lock_irqsave(&pp->lock, flags);  in smu_fpoll()
1261 		if (pp->busy && pp->cmd.status != 1)  in smu_fpoll()
1263 		spin_unlock_irqrestore(&pp->lock, flags);  in smu_fpoll()
1265 	if (pp->mode == smu_file_events) {  in smu_fpoll()
1273 	struct smu_private *pp = file->private_data;  in smu_release()  local
1277 	if (pp == 0)  in smu_release()
1283 	spin_lock_irqsave(&pp->lock, flags);  in smu_release()
1284 	pp->mode = smu_file_closing;  in smu_release()
1285 	busy = pp->busy;  in smu_release()
1288 	if (busy && pp->cmd.status == 1) {  in smu_release()
1291 		add_wait_queue(&pp->wait, &wait);  in smu_release()
1294 			if (pp->cmd.status != 1)  in smu_release()
1296 			spin_unlock_irqrestore(&pp->lock, flags);  in smu_release()
1298 			spin_lock_irqsave(&pp->lock, flags);  in smu_release()
1301 		remove_wait_queue(&pp->wait, &wait);  in smu_release()
1303 	spin_unlock_irqrestore(&pp->lock, flags);  in smu_release()
1306 	list_del(&pp->list);  in smu_release()
1308 	kfree(pp);  in smu_release()