diff options
| author | Jiri Slaby | 2006-12-08 02:38:30 -0800 |
|---|---|---|
| committer | Linus Torvalds | 2006-12-08 08:28:54 -0800 |
| commit | 925e9c1c08750096ddb4634f5d06b5451e4a92a8 (patch) | |
| tree | c4617708dc076892dc52ec501aa7643ccdf37325 /drivers/char | |
| parent | cd7ed64e1508d3275c20d072bf9037028ec34f56 (diff) | |
[PATCH] Char: mxser_new, reverse if-else-paths patch
This patch was intorduced in mxser to 1.9.1 conversion, but causes endless
sleep in tcdrain userspace call.
Thanks to Sergei Organov <osv@javad.com> for testing and pointing this out.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/mxser_new.c | 27 |
1 files changed, 7 insertions, 20 deletions
diff --git a/drivers/char/mxser_new.c b/drivers/char/mxser_new.c index 82cb420b4d68..285104d379cb 100644 --- a/drivers/char/mxser_new.c +++ b/drivers/char/mxser_new.c @@ -1218,12 +1218,7 @@ static int mxser_write_room(struct tty_struct *tty) static int mxser_chars_in_buffer(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; - int len = info->xmit_cnt; - - if (!(inb(info->ioaddr + UART_LSR) & UART_LSR_THRE)) - len++; - - return len; + return info->xmit_cnt; } static void mxser_flush_buffer(struct tty_struct *tty) @@ -1953,7 +1948,7 @@ static void mxser_stoprx(struct tty_struct *tty) if (info->board->chip_flag) { info->IER &= ~MOXA_MUST_RECV_ISR; outb(info->IER, info->ioaddr + UART_IER); - } else if (!(info->flags & ASYNC_CLOSING)) { + } else { info->x_char = STOP_CHAR(tty); outb(0, info->ioaddr + UART_IER); info->IER |= UART_IER_THRI; @@ -1990,7 +1985,7 @@ static void mxser_unthrottle(struct tty_struct *tty) if (info->board->chip_flag) { info->IER |= MOXA_MUST_RECV_ISR; outb(info->IER, info->ioaddr + UART_IER); - } else if (!(info->flags & ASYNC_CLOSING)) { + } else { info->x_char = START_CHAR(tty); outb(0, info->ioaddr + UART_IER); info->IER |= UART_IER_THRI; @@ -2265,10 +2260,8 @@ static void mxser_receive_chars(struct mxser_port *port, int *status) flag = TTY_OVERRUN; /* added by casper 1/11/2000 */ port->icount.overrun++; - } else - flags = TTY_BREAK; - } else - flags = 0; + } + } tty_insert_flip_char(tty, ch, flag); cnt++; if (cnt >= recv_room) { @@ -2324,14 +2317,8 @@ static void mxser_transmit_chars(struct mxser_port *port) if (port->xmit_buf == 0) goto unlock; - if (port->xmit_cnt == 0) { - if (port->xmit_cnt < WAKEUP_CHARS) { /* XXX what's this for?? */ - set_bit(MXSER_EVENT_TXLOW, &port->event); - schedule_work(&port->tqueue); - } - goto unlock; - } - if (port->tty->stopped || (port->tty->hw_stopped && + if ((port->xmit_cnt <= 0) || port->tty->stopped || + (port->tty->hw_stopped && (port->type != PORT_16550A) && (!port->board->chip_flag))) { port->IER &= ~UART_IER_THRI; |