1085 	struct smu_private *pp;  in smu_open()  local
1088 	pp = kzalloc(sizeof(struct smu_private), GFP_KERNEL);  in smu_open()
1089 	if (!pp)  in smu_open()
1091 	spin_lock_init(&pp->lock);  in smu_open()
1092 	pp->mode = smu_file_commands;  in smu_open()
1093 	init_waitqueue_head(&pp->wait);  in smu_open()
1097 	list_add(&pp->list, &smu_clist);  in smu_open()
1099 	file->private_data = pp;  in smu_open()
1108 	struct smu_private *pp = misc;  in smu_user_cmd_done()  local
1110 	wake_up_all(&pp->wait);  in smu_user_cmd_done()
1117 	struct smu_private *pp = file->private_data;  in smu_write()  local
1122 	if (pp->busy)  in smu_write()
1127 		pp->mode = smu_file_events;  in smu_write()
1139 	else if (pp->mode != smu_file_commands)  in smu_write()
1144 	spin_lock_irqsave(&pp->lock, flags);  in smu_write()
1145 	if (pp->busy) {  in smu_write()
1146 		spin_unlock_irqrestore(&pp->lock, flags);  in smu_write()
1149 	pp->busy = 1;  in smu_write()
1150 	pp->cmd.status = 1;  in smu_write()
1151 	spin_unlock_irqrestore(&pp->lock, flags);  in smu_write()
1153 	if (copy_from_user(pp->buffer, buf + sizeof(hdr), hdr.data_len)) {  in smu_write()
1154 		pp->busy = 0;  in smu_write()
1158 	pp->cmd.cmd = hdr.cmd;  in smu_write()
1159 	pp->cmd.data_len = hdr.data_len;  in smu_write()
1160 	pp->cmd.reply_len = SMU_MAX_DATA;  in smu_write()
1161 	pp->cmd.data_buf = pp->buffer;  in smu_write()
1162 	pp->cmd.reply_buf = pp->buffer;  in smu_write()
1163 	pp->cmd.done = smu_user_cmd_done;  in smu_write()
1164 	pp->cmd.misc = pp;  in smu_write()
1165 	rc = smu_queue_cmd(&pp->cmd);  in smu_write()
1172 static ssize_t smu_read_command(struct file *file, struct smu_private *pp,  in smu_read_command()  argument
1180 	if (!pp->busy)  in smu_read_command()
1184 	spin_lock_irqsave(&pp->lock, flags);  in smu_read_command()
1185 	if (pp->cmd.status == 1) {  in smu_read_command()
1187 			spin_unlock_irqrestore(&pp->lock, flags);  in smu_read_command()
1190 		add_wait_queue(&pp->wait, &wait);  in smu_read_command()
1194 			if (pp->cmd.status != 1)  in smu_read_command()
1199 			spin_unlock_irqrestore(&pp->lock, flags);  in smu_read_command()
1201 			spin_lock_irqsave(&pp->lock, flags);  in smu_read_command()
1204 		remove_wait_queue(&pp->wait, &wait);  in smu_read_command()
1206 	spin_unlock_irqrestore(&pp->lock, flags);  in smu_read_command()
1209 	if (pp->cmd.status != 0)  in smu_read_command()
1210 		pp->cmd.reply_len = 0;  in smu_read_command()
1211 	size = sizeof(hdr) + pp->cmd.reply_len;  in smu_read_command()
1215 	hdr.status = pp->cmd.status;  in smu_read_command()
1216 	hdr.reply_len = pp->cmd.reply_len;  in smu_read_command()
1220 	if (size && copy_to_user(buf + sizeof(hdr), pp->buffer, size))  in smu_read_command()
1222 	pp->busy = 0;  in smu_read_command()
1228 static ssize_t smu_read_events(struct file *file, struct smu_private *pp,  in smu_read_events()  argument
1240 	struct smu_private *pp = file->private_data;  in smu_read()  local
1242 	if (pp->mode == smu_file_commands)  in smu_read()
1243 		return smu_read_command(file, pp, buf, count);  in smu_read()
1244 	if (pp->mode == smu_file_events)  in smu_read()
1245 		return smu_read_events(file, pp, buf, count);  in smu_read()
1252 	struct smu_private *pp = file->private_data;  in smu_fpoll()  local
1256 	if (!pp)  in smu_fpoll()
1259 	if (pp->mode == smu_file_commands) {  in smu_fpoll()
1260 		poll_wait(file, &pp->wait, wait);  in smu_fpoll()
1262 		spin_lock_irqsave(&pp->lock, flags);  in smu_fpoll()
1263 		if (pp->busy && pp->cmd.status != 1)  in smu_fpoll()
1265 		spin_unlock_irqrestore(&pp->lock, flags);  in smu_fpoll()
1267 	if (pp->mode == smu_file_events) {  in smu_fpoll()
1275 	struct smu_private *pp = file->private_data;  in smu_release()  local
1279 	if (!pp)  in smu_release()
1285 	spin_lock_irqsave(&pp->lock, flags);  in smu_release()
1286 	pp->mode = smu_file_closing;  in smu_release()
1287 	busy = pp->busy;  in smu_release()
1290 	if (busy && pp->cmd.status == 1) {  in smu_release()
1293 		add_wait_queue(&pp->wait, &wait);  in smu_release()
1296 			if (pp->cmd.status != 1)  in smu_release()
1298 			spin_unlock_irqrestore(&pp->lock, flags);  in smu_release()
1300 			spin_lock_irqsave(&pp->lock, flags);  in smu_release()
1303 		remove_wait_queue(&pp->wait, &wait);  in smu_release()
1305 	spin_unlock_irqrestore(&pp->lock, flags);  in smu_release()
1308 	list_del(&pp->list);  in smu_release()
1310 	kfree(pp);  in smu_release()