Char: specialix, remove bottomhalves

- tqueue is used only for tty_wakeup, call it directly from the code
- tqueue_hangup for tty_hangup, it schedules its own work, use it directly
  too

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 4 insertions, 71 deletions

diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index 455855631aef..c0e08c7bca2f 100644
--- a/drivers/char/specialix.c
+++ b/drivers/char/specialix.c
@@ -178,9 +178,6 @@ static int sx_poll = HZ;
          ASYNC_SPD_HI       | ASYNC_SPEED_VHI    | ASYNC_SESSION_LOCKOUT | \
          ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP)
 
-#undef RS_EVENT_WRITE_WAKEUP
-#define RS_EVENT_WRITE_WAKEUP   0
-
 static struct tty_driver *specialix_driver;
 
 static struct specialix_board sx_board[SX_NBOARD] =  {
@@ -602,17 +599,6 @@ static int sx_probe(struct specialix_board *bp)
  *  Interrupt processing routines.
  * */
 
-static inline void sx_mark_event(struct specialix_port * port, int event)
-{
-        func_enter();
-
-        set_bit(event, &port->event);
-        schedule_work(&port->tqueue);
-
-        func_exit();
-}
-
-
 static inline struct specialix_port * sx_get_port(struct specialix_board * bp,
                                                unsigned char const * what)
 {
@@ -809,7 +795,7 @@ static inline void sx_transmit(struct specialix_board * bp)
                 sx_out(bp, CD186x_IER, port->IER);
         }
         if (port->xmit_cnt <= port->wakeup_chars)
-                sx_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+                tty_wakeup(tty);
 
         func_exit();
 }
@@ -839,7 +825,7 @@ static inline void sx_check_modem(struct specialix_board * bp)
                         wake_up_interruptible(&port->open_wait);
                 } else {
                         dprintk (SX_DEBUG_SIGNALS, "Sending HUP.\n");
-                        schedule_work(&port->tqueue_hangup);
+                        tty_hangup(tty);
                 }
         }
 
@@ -849,7 +835,7 @@ static inline void sx_check_modem(struct specialix_board * bp)
                         tty->hw_stopped = 0;
                         port->IER |= IER_TXRDY;
                         if (port->xmit_cnt <= port->wakeup_chars)
-                                sx_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+                                tty_wakeup(tty);
                 } else {
                         tty->hw_stopped = 1;
                         port->IER &= ~IER_TXRDY;
@@ -861,7 +847,7 @@ static inline void sx_check_modem(struct specialix_board * bp)
                         tty->hw_stopped = 0;
                         port->IER |= IER_TXRDY;
                         if (port->xmit_cnt <= port->wakeup_chars)
-                                sx_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+                                tty_wakeup(tty);
                 } else {
                         tty->hw_stopped = 1;
                         port->IER &= ~IER_TXRDY;
@@ -1618,7 +1604,6 @@ static void sx_close(struct tty_struct * tty, struct file * filp)
         tty_ldisc_flush(tty);
         spin_lock_irqsave(&port->lock, flags);
         tty->closing = 0;
-        port->event = 0;
         port->tty = NULL;
         spin_unlock_irqrestore(&port->lock, flags);
         if (port->blocked_open) {
@@ -2235,32 +2220,6 @@ static void sx_start(struct tty_struct * tty)
         func_exit();
 }
 
-
-/*
- * This routine is called from the work-queue when the interrupt
- * routine has signalled that a hangup has occurred.  The path of
- * hangup processing is:
- *
- *      serial interrupt routine -> (workqueue) ->
- *      do_sx_hangup() -> tty->hangup() -> sx_hangup()
- *
- */
-static void do_sx_hangup(struct work_struct *work)
-{
-        struct specialix_port   *port =
-                container_of(work, struct specialix_port, tqueue_hangup);
-        struct tty_struct       *tty;
-
-        func_enter();
-
-        tty = port->tty;
-        if (tty)
-                tty_hangup(tty);        /* FIXME: module removal race here */
-
-        func_exit();
-}
-
-
 static void sx_hangup(struct tty_struct * tty)
 {
         struct specialix_port *port = (struct specialix_port *)tty->driver_data;
@@ -2278,7 +2237,6 @@ static void sx_hangup(struct tty_struct * tty)
 
         sx_shutdown_port(bp, port);
         spin_lock_irqsave(&port->lock, flags);
-        port->event = 0;
         bp->count -= port->count;
         if (bp->count < 0) {
                 printk(KERN_ERR "sx%d: sx_hangup: bad board count: %d port: %d\n",
@@ -2320,26 +2278,6 @@ static void sx_set_termios(struct tty_struct * tty, struct ktermios * old_termio
         }
 }
 
-
-static void do_softint(struct work_struct *work)
-{
-        struct specialix_port   *port =
-                container_of(work, struct specialix_port, tqueue);
-        struct tty_struct       *tty;
-
-        func_enter();
-
-        if(!(tty = port->tty)) {
-                func_exit();
-                return;
-        }
-
-        if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event))
-                tty_wakeup(tty);
-
-        func_exit();
-}
-
 static const struct tty_operations sx_ops = {
         .open  = sx_open,
         .close = sx_close,
@@ -2397,8 +2335,6 @@ static int sx_init_drivers(void)
         memset(sx_port, 0, sizeof(sx_port));
         for (i = 0; i < SX_NPORT * SX_NBOARD; i++) {
                 sx_port[i].magic = SPECIALIX_MAGIC;
-                INIT_WORK(&sx_port[i].tqueue, do_softint);
-                INIT_WORK(&sx_port[i].tqueue_hangup, do_sx_hangup);
                 sx_port[i].close_delay = 50 * HZ/100;
                 sx_port[i].closing_wait = 3000 * HZ/100;
                 init_waitqueue_head(&sx_port[i].open_wait);
diff --git a/drivers/char/specialix_io8.h b/drivers/char/specialix_io8.h
index 895bd90de363..3f2f85bdf516 100644
--- a/drivers/char/specialix_io8.h
+++ b/drivers/char/specialix_io8.h
@@ -112,7 +112,6 @@ struct specialix_port {
         struct tty_struct       * tty;
         int                     count;
         int                     blocked_open;
-        ulong                   event;
         int                     timeout;
         int                     close_delay;
         unsigned char           * xmit_buf;
@@ -122,8 +121,6 @@ struct specialix_port {
         int                     xmit_cnt;
         wait_queue_head_t       open_wait;
         wait_queue_head_t       close_wait;
-        struct work_struct      tqueue;
-        struct work_struct      tqueue_hangup;
         short                   wakeup_chars;
         short                   break_length;
         unsigned short          closing_wait;