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[PATCH] Char: mxser_new, remove tty_wakeup bottomhalf

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It's safe to call tty_wakeup from irq context. Do not schedule it for later
calling.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiri Slaby 2007-02-10 01:45:15 -08:00 committed by Linus Torvalds
parent 98c47ea28a
commit 47c85c0db1
1 changed files with 6 additions and 20 deletions
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26
drivers/char/mxser_new.c
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@ -269,7 +269,6 @@ struct mxser_port {
struct mxser_mon mon_data;
spinlock_t slock;
struct work_struct tqueue;
wait_queue_head_t open_wait;
wait_queue_head_t delta_msr_wait;
};
@ -355,15 +354,6 @@ static void process_txrx_fifo(struct mxser_port *info)
}
}
static void mxser_do_softint(struct work_struct *work)
{
struct mxser_port *info = container_of(work, struct mxser_port, tqueue);
struct tty_struct *tty = info->tty;
if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
tty_wakeup(tty);
}
static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
{
unsigned char status = 0;
@ -607,8 +597,8 @@ static int mxser_change_speed(struct mxser_port *info,
outb(info->IER, info->ioaddr +
UART_IER);
}
set_bit(MXSER_EVENT_TXLOW, &info->event);
schedule_work(&info->tqueue); }
tty_wakeup(info->tty);
}
} else {
if (!(status & UART_MSR_CTS)) {
info->tty->hw_stopped = 1;
@ -703,7 +693,6 @@ static void mxser_check_modem_status(struct mxser_port *port, int status)
if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
if (status & UART_MSR_DCD)
wake_up_interruptible(&port->open_wait);
schedule_work(&port->tqueue);
}
if (port->flags & ASYNC_CTS_FLOW) {
@ -719,8 +708,7 @@ static void mxser_check_modem_status(struct mxser_port *port, int status)
outb(port->IER, port->ioaddr +
UART_IER);
}
set_bit(MXSER_EVENT_TXLOW, &port->event);
schedule_work(&port->tqueue);
tty_wakeup(port->tty);
}
} else {
if (!(status & UART_MSR_CTS)) {
@ -2220,10 +2208,9 @@ static void mxser_transmit_chars(struct mxser_port *port)
port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
port->icount.tx += (cnt - port->xmit_cnt);
if (port->xmit_cnt < WAKEUP_CHARS) {
set_bit(MXSER_EVENT_TXLOW, &port->event);
schedule_work(&port->tqueue);
}
if (port->xmit_cnt < WAKEUP_CHARS)
tty_wakeup(port->tty);
if (port->xmit_cnt <= 0) {
port->IER &= ~UART_IER_THRI;
outb(port->IER, port->ioaddr + UART_IER);
@ -2400,7 +2387,6 @@ static int __devinit mxser_initbrd(struct mxser_board *brd,
info->custom_divisor = info->baud_base * 16;
info->close_delay = 5 * HZ / 10;
info->closing_wait = 30 * HZ;
INIT_WORK(&info->tqueue, mxser_do_softint);
info->normal_termios = mxvar_sdriver->init_termios;
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->delta_msr_wait);