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Commit 216ba023 authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds
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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
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Showing with 103 additions and 89 deletions
drivers/char/mxser.c
View file @ 216ba023
......@@ -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);
}
......
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