1077 	struct smu_private *pp;  in smu_open()  local
1080 	pp = kzalloc(sizeof(struct smu_private), GFP_KERNEL);  in smu_open()
1081 	if (pp == 0)  in smu_open()
1083 	spin_lock_init(&pp->lock);  in smu_open()
1084 	pp->mode = smu_file_commands;  in smu_open()
1085 	init_waitqueue_head(&pp->wait);  in smu_open()
1089 	list_add(&pp->list, &smu_clist);  in smu_open()
1091 	file->private_data = pp;  in smu_open()
1100 	struct smu_private *pp = misc;  in smu_user_cmd_done()  local
1102 	wake_up_all(&pp->wait);  in smu_user_cmd_done()
1109 	struct smu_private *pp = file->private_data;  in smu_write()  local
1114 	if (pp->busy)  in smu_write()
1119 		pp->mode = smu_file_events;  in smu_write()
1131 	else if (pp->mode != smu_file_commands)  in smu_write()
1136 	spin_lock_irqsave(&pp->lock, flags);  in smu_write()
1137 	if (pp->busy) {  in smu_write()
1138 		spin_unlock_irqrestore(&pp->lock, flags);  in smu_write()
1141 	pp->busy = 1;  in smu_write()
1142 	pp->cmd.status = 1;  in smu_write()
1143 	spin_unlock_irqrestore(&pp->lock, flags);  in smu_write()
1145 	if (copy_from_user(pp->buffer, buf + sizeof(hdr), hdr.data_len)) {  in smu_write()
1146 		pp->busy = 0;  in smu_write()
1150 	pp->cmd.cmd = hdr.cmd;  in smu_write()
1151 	pp->cmd.data_len = hdr.data_len;  in smu_write()
1152 	pp->cmd.reply_len = SMU_MAX_DATA;  in smu_write()
1153 	pp->cmd.data_buf = pp->buffer;  in smu_write()
1154 	pp->cmd.reply_buf = pp->buffer;  in smu_write()
1155 	pp->cmd.done = smu_user_cmd_done;  in smu_write()
1156 	pp->cmd.misc = pp;  in smu_write()
1157 	rc = smu_queue_cmd(&pp->cmd);  in smu_write()
1164 static ssize_t smu_read_command(struct file *file, struct smu_private *pp,  in smu_read_command()  argument
1172 	if (!pp->busy)  in smu_read_command()
1176 	spin_lock_irqsave(&pp->lock, flags);  in smu_read_command()
1177 	if (pp->cmd.status == 1) {  in smu_read_command()
1179 			spin_unlock_irqrestore(&pp->lock, flags);  in smu_read_command()
1182 		add_wait_queue(&pp->wait, &wait);  in smu_read_command()
1186 			if (pp->cmd.status != 1)  in smu_read_command()
1191 			spin_unlock_irqrestore(&pp->lock, flags);  in smu_read_command()
1193 			spin_lock_irqsave(&pp->lock, flags);  in smu_read_command()
1196 		remove_wait_queue(&pp->wait, &wait);  in smu_read_command()
1198 	spin_unlock_irqrestore(&pp->lock, flags);  in smu_read_command()
1201 	if (pp->cmd.status != 0)  in smu_read_command()
1202 		pp->cmd.reply_len = 0;  in smu_read_command()
1203 	size = sizeof(hdr) + pp->cmd.reply_len;  in smu_read_command()
1207 	hdr.status = pp->cmd.status;  in smu_read_command()
1208 	hdr.reply_len = pp->cmd.reply_len;  in smu_read_command()
1212 	if (size && copy_to_user(buf + sizeof(hdr), pp->buffer, size))  in smu_read_command()
1214 	pp->busy = 0;  in smu_read_command()
1220 static ssize_t smu_read_events(struct file *file, struct smu_private *pp,  in smu_read_events()  argument
1232 	struct smu_private *pp = file->private_data;  in smu_read()  local
1234 	if (pp->mode == smu_file_commands)  in smu_read()
1235 		return smu_read_command(file, pp, buf, count);  in smu_read()
1236 	if (pp->mode == smu_file_events)  in smu_read()
1237 		return smu_read_events(file, pp, buf, count);  in smu_read()
1244 	struct smu_private *pp = file->private_data;  in smu_fpoll()  local
1248 	if (pp == 0)  in smu_fpoll()
1251 	if (pp->mode == smu_file_commands) {  in smu_fpoll()
1252 		poll_wait(file, &pp->wait, wait);  in smu_fpoll()
1254 		spin_lock_irqsave(&pp->lock, flags);  in smu_fpoll()
1255 		if (pp->busy && pp->cmd.status != 1)  in smu_fpoll()
1257 		spin_unlock_irqrestore(&pp->lock, flags);  in smu_fpoll()
1259 	if (pp->mode == smu_file_events) {  in smu_fpoll()
1267 	struct smu_private *pp = file->private_data;  in smu_release()  local
1271 	if (pp == 0)  in smu_release()
1277 	spin_lock_irqsave(&pp->lock, flags);  in smu_release()
1278 	pp->mode = smu_file_closing;  in smu_release()
1279 	busy = pp->busy;  in smu_release()
1282 	if (busy && pp->cmd.status == 1) {  in smu_release()
1285 		add_wait_queue(&pp->wait, &wait);  in smu_release()
1288 			if (pp->cmd.status != 1)  in smu_release()
1290 			spin_unlock_irqrestore(&pp->lock, flags);  in smu_release()
1292 			spin_lock_irqsave(&pp->lock, flags);  in smu_release()
1295 		remove_wait_queue(&pp->wait, &wait);  in smu_release()
1297 	spin_unlock_irqrestore(&pp->lock, flags);  in smu_release()
1300 	list_del(&pp->list);  in smu_release()
1302 	kfree(pp);  in smu_release()