[PATCH] Char: mxser_new, remove tty_wakeup bottomhalf

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>

diff --git a/drivers/char/mxser_new.c b/drivers/char/mxser_new.c
index 4d4721e..420d23f 100644 (file)
--- a/drivers/char/mxser_new.c
+++ b/drivers/char/mxser_new.c
@@ -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);