diff options
| -rw-r--r-- | drivers/tty/mxser.c | 36 |
1 files changed, 6 insertions, 30 deletions
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index c3f262dc936d..2359b4aa68af 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -251,8 +251,6 @@ struct mxser_port { u8 MCR; /* Modem control register */ u8 FCR; /* FIFO control register */ - bool ldisc_stop_rx; - struct async_icount icount; /* kernel counters for 4 input interrupts */ unsigned int timeout; @@ -1286,11 +1284,14 @@ static int mxser_get_icount(struct tty_struct *tty, return 0; } -static void mxser_stoprx(struct tty_struct *tty) +/* + * This routine is called by the upper-layer tty layer to signal that + * incoming characters should be throttled. + */ +static void mxser_throttle(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; - info->ldisc_stop_rx = true; if (I_IXOFF(tty)) { if (info->board->must_hwid) { info->IER &= ~MOXA_MUST_RECV_ISR; @@ -1309,21 +1310,11 @@ static void mxser_stoprx(struct tty_struct *tty) } } -/* - * This routine is called by the upper-layer tty layer to signal that - * incoming characters should be throttled. - */ -static void mxser_throttle(struct tty_struct *tty) -{ - mxser_stoprx(tty); -} - static void mxser_unthrottle(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; /* startrx */ - info->ldisc_stop_rx = false; if (I_IXOFF(tty)) { if (info->x_char) info->x_char = 0; @@ -1515,9 +1506,6 @@ static bool mxser_receive_chars_new(struct tty_struct *tty, if (hwid == MOXA_MUST_MU150_HWID) gdl &= MOXA_MUST_GDL_MASK; - if (gdl >= tty->receive_room && !port->ldisc_stop_rx) - mxser_stoprx(tty); - while (gdl--) { u8 ch = inb(port->ioaddr + UART_RX); tty_insert_flip_char(&port->port, ch, 0); @@ -1530,10 +1518,8 @@ static u8 mxser_receive_chars_old(struct tty_struct *tty, struct mxser_port *port, u8 status) { enum mxser_must_hwid hwid = port->board->must_hwid; - int recv_room = tty->receive_room; int ignored = 0; int max = 256; - int cnt = 0; u8 ch; do { @@ -1568,14 +1554,8 @@ static u8 mxser_receive_chars_old(struct tty_struct *tty, port->icount.overrun++; } } - tty_insert_flip_char(&port->port, ch, flag); - cnt++; - if (cnt >= recv_room) { - if (!port->ldisc_stop_rx) - mxser_stoprx(tty); + if (!tty_insert_flip_char(&port->port, ch, flag)) break; - } - } if (hwid) @@ -1590,9 +1570,6 @@ static u8 mxser_receive_chars_old(struct tty_struct *tty, static u8 mxser_receive_chars(struct tty_struct *tty, struct mxser_port *port, u8 status) { - if (tty->receive_room == 0 && !port->ldisc_stop_rx) - mxser_stoprx(tty); - if (!mxser_receive_chars_new(tty, port, status)) status = mxser_receive_chars_old(tty, port, status); @@ -1798,7 +1775,6 @@ static void mxser_initbrd(struct mxser_board *brd, bool high_baud) tty_port_init(&info->port); info->port.ops = &mxser_port_ops; info->board = brd; - info->ldisc_stop_rx = false; /* Enhance mode enabled here */ if (brd->must_hwid != MOXA_OTHER_UART) |