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Commit 216ba023 authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds
Browse files

mxser: Switch to kref tty 



Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d18a750f

drivers/char/mxser.c

+103 −89
Original line number Diff line number Diff line
@@ -610,15 +610,16 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, 
	return 0;

}



static int mxser_set_baud(struct mxser_port *info, long newspd)

static int mxser_set_baud(struct tty_struct *tty, long newspd)

{

	struct mxser_port *info = tty->driver_data;

	int quot = 0, baud;

	unsigned char cval;



	if (!info->port.tty || !info->port.tty->termios)

	if (!tty->termios)

		return -1;



	if (!(info->ioaddr))

	if (!info->ioaddr)

		return -1;



	if (newspd > info->max_baud)
@@ -626,13 +627,13 @@ static int mxser_set_baud(struct mxser_port *info, long newspd) 


	if (newspd == 134) {

		quot = 2 * info->baud_base / 269;

		tty_encode_baud_rate(info->port.tty, 134, 134);

		tty_encode_baud_rate(tty, 134, 134);

	} else if (newspd) {

		quot = info->baud_base / newspd;

		if (quot == 0)

			quot = 1;

		baud = info->baud_base/quot;

		tty_encode_baud_rate(info->port.tty, baud, baud);

		tty_encode_baud_rate(tty, baud, baud);

	} else {

		quot = 0;

	}
@@ -658,7 +659,7 @@ static int mxser_set_baud(struct mxser_port *info, long newspd) 
	outb(cval, info->ioaddr + UART_LCR);	/* reset DLAB */



#ifdef BOTHER

	if (C_BAUD(info->port.tty) == BOTHER) {

	if (C_BAUD(tty) == BOTHER) {

		quot = info->baud_base % newspd;

		quot *= 8;

		if (quot % newspd > newspd / 2) {
@@ -679,21 +680,22 @@ static int mxser_set_baud(struct mxser_port *info, long newspd) 
 * This routine is called to set the UART divisor registers to match

 * the specified baud rate for a serial port.

 */

static int mxser_change_speed(struct mxser_port *info,

static int mxser_change_speed(struct tty_struct *tty,

					struct ktermios *old_termios)

{

	struct mxser_port *info = tty->driver_data;

	unsigned cflag, cval, fcr;

	int ret = 0;

	unsigned char status;



	if (!info->port.tty || !info->port.tty->termios)

	if (!tty->termios)

		return ret;

	cflag = info->port.tty->termios->c_cflag;

	if (!(info->ioaddr))

	cflag = tty->termios->c_cflag;

	if (!info->ioaddr)

		return ret;



	if (mxser_set_baud_method[info->port.tty->index] == 0)

		mxser_set_baud(info, tty_get_baud_rate(info->port.tty));

	if (mxser_set_baud_method[tty->index] == 0)

		mxser_set_baud(tty, tty_get_baud_rate(tty));



	/* byte size and parity */

	switch (cflag & CSIZE) {
@@ -762,9 +764,9 @@ static int mxser_change_speed(struct mxser_port *info, 
			info->MCR |= UART_MCR_AFE;

		} else {

			status = inb(info->ioaddr + UART_MSR);

			if (info->port.tty->hw_stopped) {

			if (tty->hw_stopped) {

				if (status & UART_MSR_CTS) {

					info->port.tty->hw_stopped = 0;

					tty->hw_stopped = 0;

					if (info->type != PORT_16550A &&

							!info->board->chip_flag) {

						outb(info->IER & ~UART_IER_THRI,
@@ -774,11 +776,11 @@ static int mxser_change_speed(struct mxser_port *info, 
						outb(info->IER, info->ioaddr +

								UART_IER);

					}

					tty_wakeup(info->port.tty);

					tty_wakeup(tty);

				}

			} else {

				if (!(status & UART_MSR_CTS)) {

					info->port.tty->hw_stopped = 1;

					tty->hw_stopped = 1;

					if ((info->type != PORT_16550A) &&

							(!info->board->chip_flag)) {

						info->IER &= ~UART_IER_THRI;
@@ -804,21 +806,21 @@ static int mxser_change_speed(struct mxser_port *info, 
	 * Set up parity check flag

	 */

	info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;

	if (I_INPCK(info->port.tty))

	if (I_INPCK(tty))

		info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;

	if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))

	if (I_BRKINT(tty) || I_PARMRK(tty))

		info->read_status_mask |= UART_LSR_BI;



	info->ignore_status_mask = 0;



	if (I_IGNBRK(info->port.tty)) {

	if (I_IGNBRK(tty)) {

		info->ignore_status_mask |= UART_LSR_BI;

		info->read_status_mask |= UART_LSR_BI;

		/*

		 * If we're ignore parity and break indicators, ignore

		 * overruns too.  (For real raw support).

		 */

		if (I_IGNPAR(info->port.tty)) {

		if (I_IGNPAR(tty)) {

			info->ignore_status_mask |=

						UART_LSR_OE |

						UART_LSR_PE |
@@ -830,16 +832,16 @@ static int mxser_change_speed(struct mxser_port *info, 
		}

	}

	if (info->board->chip_flag) {

		mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->port.tty));

		mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->port.tty));

		if (I_IXON(info->port.tty)) {

		mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));

		mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));

		if (I_IXON(tty)) {

			mxser_enable_must_rx_software_flow_control(

					info->ioaddr);

		} else {

			mxser_disable_must_rx_software_flow_control(

					info->ioaddr);

		}

		if (I_IXOFF(info->port.tty)) {

		if (I_IXOFF(tty)) {

			mxser_enable_must_tx_software_flow_control(

					info->ioaddr);

		} else {
@@ -855,7 +857,8 @@ static int mxser_change_speed(struct mxser_port *info, 
	return ret;

}



static void mxser_check_modem_status(struct mxser_port *port, int status)

static void mxser_check_modem_status(struct tty_struct *tty,

				struct mxser_port *port, int status)

{

	/* update input line counters */

	if (status & UART_MSR_TERI)
@@ -874,10 +877,11 @@ static void mxser_check_modem_status(struct mxser_port *port, int status) 
			wake_up_interruptible(&port->port.open_wait);

	}



	tty = tty_port_tty_get(&port->port);

	if (port->port.flags & ASYNC_CTS_FLOW) {

		if (port->port.tty->hw_stopped) {

		if (tty->hw_stopped) {

			if (status & UART_MSR_CTS) {

				port->port.tty->hw_stopped = 0;

				tty->hw_stopped = 0;



				if ((port->type != PORT_16550A) &&

						(!port->board->chip_flag)) {
@@ -887,11 +891,11 @@ static void mxser_check_modem_status(struct mxser_port *port, int status) 
					outb(port->IER, port->ioaddr +

							UART_IER);

				}

				tty_wakeup(port->port.tty);

				tty_wakeup(tty);

			}

		} else {

			if (!(status & UART_MSR_CTS)) {

				port->port.tty->hw_stopped = 1;

				tty->hw_stopped = 1;

				if (port->type != PORT_16550A &&

						!port->board->chip_flag) {

					port->IER &= ~UART_IER_THRI;
@@ -903,8 +907,9 @@ static void mxser_check_modem_status(struct mxser_port *port, int status) 
	}

}



static int mxser_startup(struct mxser_port *info)

static int mxser_startup(struct tty_struct *tty)

{

	struct mxser_port *info = tty->driver_data;

	unsigned long page;

	unsigned long flags;
@@ -921,8 +926,7 @@ static int mxser_startup(struct mxser_port *info) 
	}



	if (!info->ioaddr || !info->type) {

		if (info->port.tty)

			set_bit(TTY_IO_ERROR, &info->port.tty->flags);

		set_bit(TTY_IO_ERROR, &tty->flags);

		free_page(page);

		spin_unlock_irqrestore(&info->slock, flags);

		return 0;
@@ -952,8 +956,8 @@ static int mxser_startup(struct mxser_port *info) 
	if (inb(info->ioaddr + UART_LSR) == 0xff) {

		spin_unlock_irqrestore(&info->slock, flags);

		if (capable(CAP_SYS_ADMIN)) {

			if (info->port.tty)

				set_bit(TTY_IO_ERROR, &info->port.tty->flags);

			if (tty)

				set_bit(TTY_IO_ERROR, &tty->flags);

			return 0;

		} else

			return -ENODEV;
@@ -991,14 +995,13 @@ static int mxser_startup(struct mxser_port *info) 
	(void) inb(info->ioaddr + UART_IIR);

	(void) inb(info->ioaddr + UART_MSR);



	if (info->port.tty)

		clear_bit(TTY_IO_ERROR, &info->port.tty->flags);

	clear_bit(TTY_IO_ERROR, &tty->flags);

	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;



	/*

	 * and set the speed of the serial port

	 */

	mxser_change_speed(info, NULL);

	mxser_change_speed(tty, NULL);

	info->port.flags |= ASYNC_INITIALIZED;

	spin_unlock_irqrestore(&info->slock, flags);
@@ -1009,8 +1012,9 @@ static int mxser_startup(struct mxser_port *info) 
 * This routine will shutdown a serial port; interrupts maybe disabled, and

 * DTR is dropped if the hangup on close termio flag is on.

 */

static void mxser_shutdown(struct mxser_port *info)

static void mxser_shutdown(struct tty_struct *tty)

{

	struct mxser_port *info = tty->driver_data;

	unsigned long flags;



	if (!(info->port.flags & ASYNC_INITIALIZED))
@@ -1035,7 +1039,7 @@ static void mxser_shutdown(struct mxser_port *info) 
	info->IER = 0;

	outb(0x00, info->ioaddr + UART_IER);



	if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))

	if (tty->termios->c_cflag & HUPCL)

		info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);

	outb(info->MCR, info->ioaddr + UART_MCR);
@@ -1051,8 +1055,7 @@ static void mxser_shutdown(struct mxser_port *info) 
	/* read data port to reset things */

	(void) inb(info->ioaddr + UART_RX);



	if (info->port.tty)

		set_bit(TTY_IO_ERROR, &info->port.tty->flags);

	set_bit(TTY_IO_ERROR, &tty->flags);



	info->port.flags &= ~ASYNC_INITIALIZED;
@@ -1084,14 +1087,14 @@ static int mxser_open(struct tty_struct *tty, struct file *filp) 
		return -ENODEV;



	tty->driver_data = info;

	info->port.tty = tty;

	tty_port_tty_set(&info->port, tty);

	/*

	 * Start up serial port

	 */

	spin_lock_irqsave(&info->slock, flags);

	info->port.count++;

	spin_unlock_irqrestore(&info->slock, flags);

	retval = mxser_startup(info);

	retval = mxser_startup(tty);

	if (retval)

		return retval;
@@ -1209,13 +1212,13 @@ static void mxser_close(struct tty_struct *tty, struct file *filp) 
				break;

		}

	}

	mxser_shutdown(info);

	mxser_shutdown(tty);



	mxser_flush_buffer(tty);

	tty_ldisc_flush(tty);



	tty->closing = 0;

	info->port.tty = NULL;

	tty_port_tty_set(&info->port, NULL);

	if (info->port.blocked_open) {

		if (info->port.close_delay)

			schedule_timeout_interruptible(info->port.close_delay);
@@ -1337,12 +1340,13 @@ static int mxser_chars_in_buffer(struct tty_struct *tty) 
 * friends of mxser_ioctl()

 * ------------------------------------------------------------

 */

static int mxser_get_serial_info(struct mxser_port *info,

static int mxser_get_serial_info(struct tty_struct *tty,

		struct serial_struct __user *retinfo)

{

	struct mxser_port *info = tty->driver_data;

	struct serial_struct tmp = {

		.type = info->type,

		.line = info->port.tty->index,

		.line = tty->index,

		.port = info->ioaddr,

		.irq = info->board->irq,

		.flags = info->port.flags,
@@ -1357,9 +1361,10 @@ static int mxser_get_serial_info(struct mxser_port *info, 
	return 0;

}



static int mxser_set_serial_info(struct mxser_port *info,

static int mxser_set_serial_info(struct tty_struct *tty,

		struct serial_struct __user *new_info)

{

	struct mxser_port *info = tty->driver_data;

	struct serial_struct new_serial;

	speed_t baud;

	unsigned long sl_flags;
@@ -1393,14 +1398,14 @@ static int mxser_set_serial_info(struct mxser_port *info, 
				(new_serial.flags & ASYNC_FLAGS));

		info->port.close_delay = new_serial.close_delay * HZ / 100;

		info->port.closing_wait = new_serial.closing_wait * HZ / 100;

		info->port.tty->low_latency =

				(info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;

		tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY)

								? 1 : 0;

		if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&

				(new_serial.baud_base != info->baud_base ||

				new_serial.custom_divisor !=

				info->custom_divisor)) {

			baud = new_serial.baud_base / new_serial.custom_divisor;

			tty_encode_baud_rate(info->port.tty, baud, baud);

			tty_encode_baud_rate(tty, baud, baud);

		}

	}
@@ -1411,11 +1416,11 @@ static int mxser_set_serial_info(struct mxser_port *info, 
	if (info->port.flags & ASYNC_INITIALIZED) {

		if (flags != (info->port.flags & ASYNC_SPD_MASK)) {

			spin_lock_irqsave(&info->slock, sl_flags);

			mxser_change_speed(info, NULL);

			mxser_change_speed(tty, NULL);

			spin_unlock_irqrestore(&info->slock, sl_flags);

		}

	} else

		retval = mxser_startup(info);

		retval = mxser_startup(tty);



	return retval;

}
@@ -1461,7 +1466,7 @@ static int mxser_tiocmget(struct tty_struct *tty, struct file *file) 
	spin_lock_irqsave(&info->slock, flags);

	status = inb(info->ioaddr + UART_MSR);

	if (status & UART_MSR_ANY_DELTA)

		mxser_check_modem_status(info, status);

		mxser_check_modem_status(tty, info, status);

	spin_unlock_irqrestore(&info->slock, flags);

	return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |

		    ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
@@ -1606,6 +1611,7 @@ static int __init mxser_read_register(int port, unsigned short *regs) 
static int mxser_ioctl_special(unsigned int cmd, void __user *argp)

{

	struct mxser_port *port;

	struct tty_struct *tty;

	int result, status;

	unsigned int i, j;

	int ret = 0;
@@ -1644,11 +1650,13 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp) 
				if (!port->ioaddr)

					goto copy;

				

				if (!port->port.tty || !port->port.tty->termios)

				tty = tty_port_tty_get(&port->port);



				if (!tty || !tty->termios)

					ms.cflag = port->normal_termios.c_cflag;

				else

					ms.cflag = port->port.tty->termios->c_cflag;



					ms.cflag = tty->termios->c_cflag;

				tty_kref_put(tty);

				status = inb(port->ioaddr + UART_MSR);

				if (status & UART_MSR_DCD)

					ms.dcd = 1;
@@ -1704,15 +1712,18 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp) 
				me->up_txcnt[p] = port->mon_data.up_txcnt;

				me->modem_status[p] =

					port->mon_data.modem_status;

				me->baudrate[p] = tty_get_baud_rate(port->port.tty);

				tty = tty_port_tty_get(&port->port);



				if (!port->port.tty || !port->port.tty->termios) {

				if (!tty || !tty->termios) {

					cflag = port->normal_termios.c_cflag;

					iflag = port->normal_termios.c_iflag;

					me->baudrate[p] = tty_termios_baud_rate(&port->normal_termios);

				} else {

					cflag = port->port.tty->termios->c_cflag;

					iflag = port->port.tty->termios->c_iflag;

					cflag = tty->termios->c_cflag;

					iflag = tty->termios->c_iflag;

					me->baudrate[p] = tty_get_baud_rate(tty);

				}

				tty_kref_put(tty);



				me->databits[p] = cflag & CSIZE;

				me->stopbits[p] = cflag & CSTOPB;
@@ -1822,12 +1833,12 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, 
	switch (cmd) {

	case TIOCGSERIAL:

		lock_kernel();

		retval = mxser_get_serial_info(info, argp);

		retval = mxser_get_serial_info(tty, argp);

		unlock_kernel();

		return retval;

	case TIOCSSERIAL:

		lock_kernel();

		retval = mxser_set_serial_info(info, argp);

		retval = mxser_set_serial_info(tty, argp);

		unlock_kernel();

		return retval;

	case TIOCSERGETLSR:	/* Get line status register */
@@ -1896,7 +1907,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, 


		lock_kernel();

		status = mxser_get_msr(info->ioaddr, 1, tty->index);

		mxser_check_modem_status(info, status);

		mxser_check_modem_status(tty, info, status);



		mcr = inb(info->ioaddr + UART_MCR);

		if (mcr & MOXA_MUST_MCR_XON_FLAG)
@@ -1909,7 +1920,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, 
		else

			info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;



		if (info->port.tty->hw_stopped)

		if (tty->hw_stopped)

			info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;

		else

			info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
@@ -1958,7 +1969,7 @@ static void mxser_stoprx(struct tty_struct *tty) 
		}

	}



	if (info->port.tty->termios->c_cflag & CRTSCTS) {

	if (tty->termios->c_cflag & CRTSCTS) {

		info->MCR &= ~UART_MCR_RTS;

		outb(info->MCR, info->ioaddr + UART_MCR);

	}
@@ -1995,7 +2006,7 @@ static void mxser_unthrottle(struct tty_struct *tty) 
		}

	}



	if (info->port.tty->termios->c_cflag & CRTSCTS) {

	if (tty->termios->c_cflag & CRTSCTS) {

		info->MCR |= UART_MCR_RTS;

		outb(info->MCR, info->ioaddr + UART_MCR);

	}
@@ -2040,7 +2051,7 @@ static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termi 
	unsigned long flags;



	spin_lock_irqsave(&info->slock, flags);

	mxser_change_speed(info, old_termios);

	mxser_change_speed(tty, old_termios);

	spin_unlock_irqrestore(&info->slock, flags);



	if ((old_termios->c_cflag & CRTSCTS) &&
@@ -2138,10 +2149,10 @@ static void mxser_hangup(struct tty_struct *tty) 
	struct mxser_port *info = tty->driver_data;



	mxser_flush_buffer(tty);

	mxser_shutdown(info);

	mxser_shutdown(tty);

	info->port.count = 0;

	info->port.flags &= ~ASYNC_NORMAL_ACTIVE;

	info->port.tty = NULL;

	tty_port_tty_set(&info->port, NULL);

	wake_up_interruptible(&info->port.open_wait);

}
@@ -2164,9 +2175,9 @@ static int mxser_rs_break(struct tty_struct *tty, int break_state) 
	return 0;

}



static void mxser_receive_chars(struct mxser_port *port, int *status)

static void mxser_receive_chars(struct tty_struct *tty,

				struct mxser_port *port, int *status)

{

	struct tty_struct *tty = port->port.tty;

	unsigned char ch, gdl;

	int ignored = 0;

	int cnt = 0;
@@ -2174,9 +2185,8 @@ static void mxser_receive_chars(struct mxser_port *port, int *status) 
	int max = 256;



	recv_room = tty->receive_room;

	if ((recv_room == 0) && (!port->ldisc_stop_rx))

	if (recv_room == 0 && !port->ldisc_stop_rx)

		mxser_stoprx(tty);



	if (port->board->chip_flag != MOXA_OTHER_UART) {



		if (*status & UART_LSR_SPECIAL)
@@ -2253,7 +2263,7 @@ static void mxser_receive_chars(struct mxser_port *port, int *status) 
	} while (*status & UART_LSR_DR);



end_intr:

	mxvar_log.rxcnt[port->port.tty->index] += cnt;

	mxvar_log.rxcnt[tty->index] += cnt;

	port->mon_data.rxcnt += cnt;

	port->mon_data.up_rxcnt += cnt;
@@ -2267,14 +2277,14 @@ static void mxser_receive_chars(struct mxser_port *port, int *status) 
	spin_lock(&port->slock);

}



static void mxser_transmit_chars(struct mxser_port *port)

static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)

{

	int count, cnt;



	if (port->x_char) {

		outb(port->x_char, port->ioaddr + UART_TX);

		port->x_char = 0;

		mxvar_log.txcnt[port->port.tty->index]++;

		mxvar_log.txcnt[tty->index]++;

		port->mon_data.txcnt++;

		port->mon_data.up_txcnt++;

		port->icount.tx++;
@@ -2284,8 +2294,8 @@ static void mxser_transmit_chars(struct mxser_port *port) 
	if (port->port.xmit_buf == NULL)

		return;



	if ((port->xmit_cnt <= 0) || port->port.tty->stopped ||

			(port->port.tty->hw_stopped &&

	if (port->xmit_cnt <= 0 || tty->stopped ||

			(tty->hw_stopped &&

			(port->type != PORT_16550A) &&

			(!port->board->chip_flag))) {

		port->IER &= ~UART_IER_THRI;
@@ -2302,14 +2312,14 @@ static void mxser_transmit_chars(struct mxser_port *port) 
		if (--port->xmit_cnt <= 0)

			break;

	} while (--count > 0);

	mxvar_log.txcnt[port->port.tty->index] += (cnt - port->xmit_cnt);

	mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);



	port->mon_data.txcnt += (cnt - port->xmit_cnt);

	port->mon_data.up_txcnt += (cnt - port->xmit_cnt);

	port->icount.tx += (cnt - port->xmit_cnt);



	if (port->xmit_cnt < WAKEUP_CHARS)

		tty_wakeup(port->port.tty);

	if (port->xmit_cnt < WAKEUP_CHARS && tty)

		tty_wakeup(tty);



	if (port->xmit_cnt <= 0) {

		port->IER &= ~UART_IER_THRI;
@@ -2328,6 +2338,7 @@ static irqreturn_t mxser_interrupt(int irq, void *dev_id) 
	int max, irqbits, bits, msr;

	unsigned int int_cnt, pass_counter = 0;

	int handled = IRQ_NONE;

	struct tty_struct *tty;



	for (i = 0; i < MXSER_BOARDS; i++)

		if (dev_id == &mxser_boards[i]) {
@@ -2360,13 +2371,15 @@ static irqreturn_t mxser_interrupt(int irq, void *dev_id) 
				if (iir & UART_IIR_NO_INT)

					break;

				iir &= MOXA_MUST_IIR_MASK;

				if (!port->port.tty ||

				tty = tty_port_tty_get(&port->port);

				if (!tty ||

						(port->port.flags & ASYNC_CLOSING) ||

						!(port->port.flags &

							ASYNC_INITIALIZED)) {

					status = inb(port->ioaddr + UART_LSR);

					outb(0x27, port->ioaddr + UART_FCR);

					inb(port->ioaddr + UART_MSR);

					tty_kref_put(tty);

					break;

				}
@@ -2387,27 +2400,28 @@ static irqreturn_t mxser_interrupt(int irq, void *dev_id) 
					    iir == MOXA_MUST_IIR_RDA ||

					    iir == MOXA_MUST_IIR_RTO ||

					    iir == MOXA_MUST_IIR_LSR)

						mxser_receive_chars(port,

						mxser_receive_chars(tty, port,

								&status);



				} else {

					status &= port->read_status_mask;

					if (status & UART_LSR_DR)

						mxser_receive_chars(port,

						mxser_receive_chars(tty, port,

								&status);

				}

				msr = inb(port->ioaddr + UART_MSR);

				if (msr & UART_MSR_ANY_DELTA)

					mxser_check_modem_status(port, msr);

					mxser_check_modem_status(tty, port, msr);



				if (port->board->chip_flag) {

					if (iir == 0x02 && (status &

								UART_LSR_THRE))

						mxser_transmit_chars(port);

						mxser_transmit_chars(tty, port);

				} else {

					if (status & UART_LSR_THRE)

						mxser_transmit_chars(port);

						mxser_transmit_chars(tty, port);

				}

				tty_kref_put(tty);

			} while (int_cnt++ < MXSER_ISR_PASS_LIMIT);

			spin_unlock(&port->slock);

		}