Char: riscom8, remove wakeup and hangup bottomhalves

Both of them may be called directly from the code, don't add special code
and variables and schedule a work for them.

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>

1 files changed, 4 insertions, 47 deletions

diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
index 9b19abf29a2b..8fc4fe4e38f1 100644
--- a/drivers/char/riscom8.c
+++ b/drivers/char/riscom8.c
@@ -78,8 +78,6 @@
          ASYNC_SPD_HI       | ASYNC_SPEED_VHI    | ASYNC_SESSION_LOCKOUT | \
          ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP)
 
-#define RS_EVENT_WRITE_WAKEUP   0
-
 static struct tty_driver *riscom_driver;
 
 static DEFINE_SPINLOCK(riscom_lock);
@@ -314,12 +312,6 @@ out_release:
  * 
  */
 
-static inline void rc_mark_event(struct riscom_port * port, int event)
-{
-        set_bit(event, &port->event);
-        schedule_work(&port->tqueue);
-}
-
 static inline struct riscom_port * rc_get_port(struct riscom_board const * bp,
                                                unsigned char const * what)
 {
@@ -486,7 +478,7 @@ static inline void rc_transmit(struct riscom_board const * bp)
                 rc_out(bp, CD180_IER, port->IER);
         }
         if (port->xmit_cnt <= port->wakeup_chars)
-                rc_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+                tty_wakeup(tty);
 }
 
 static inline void rc_check_modem(struct riscom_board const * bp)
@@ -505,7 +497,7 @@ static inline void rc_check_modem(struct riscom_board const * bp)
                 if (rc_in(bp, CD180_MSVR) & MSVR_CD) 
                         wake_up_interruptible(&port->open_wait);
                 else
-                        schedule_work(&port->tqueue_hangup);
+                        tty_hangup(tty);
         }
         
 #ifdef RISCOM_BRAIN_DAMAGED_CTS
@@ -514,7 +506,7 @@ static inline void rc_check_modem(struct riscom_board const * bp)
                         tty->hw_stopped = 0;
                         port->IER |= IER_TXRDY;
                         if (port->xmit_cnt <= port->wakeup_chars)
-                                rc_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+                                tty_wakeup(tty);
                 } else  {
                         tty->hw_stopped = 1;
                         port->IER &= ~IER_TXRDY;
@@ -526,7 +518,7 @@ static inline void rc_check_modem(struct riscom_board const * bp)
                         tty->hw_stopped = 0;
                         port->IER |= IER_TXRDY;
                         if (port->xmit_cnt <= port->wakeup_chars)
-                                rc_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+                                tty_wakeup(tty);
                 } else  {
                         tty->hw_stopped = 1;
                         port->IER &= ~IER_TXRDY;
@@ -1091,7 +1083,6 @@ static void rc_close(struct tty_struct * tty, struct file * filp)
         tty_ldisc_flush(tty);
 
         tty->closing = 0;
-        port->event = 0;
         port->tty = NULL;
         if (port->blocked_open) {
                 if (port->close_delay) {
@@ -1526,25 +1517,6 @@ static void rc_start(struct tty_struct * tty)
         spin_unlock_irqrestore(&riscom_lock, flags);
 }
 
-/*
- * 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_rc_hangup() -> tty->hangup() -> rc_hangup()
- * 
- */
-static void do_rc_hangup(struct work_struct *ugly_api)
-{
-        struct riscom_port      *port = container_of(ugly_api, struct riscom_port, tqueue_hangup);
-        struct tty_struct       *tty;
-        
-        tty = port->tty;
-        if (tty)
-                tty_hangup(tty);        /* FIXME: module removal race still here */
-}
-
 static void rc_hangup(struct tty_struct * tty)
 {
         struct riscom_port *port = (struct riscom_port *)tty->driver_data;
@@ -1556,7 +1528,6 @@ static void rc_hangup(struct tty_struct * tty)
         bp = port_Board(port);
         
         rc_shutdown_port(bp, port);
-        port->event = 0;
         port->count = 0;
         port->flags &= ~ASYNC_NORMAL_ACTIVE;
         port->tty = NULL;
@@ -1586,18 +1557,6 @@ static void rc_set_termios(struct tty_struct * tty, struct ktermios * old_termio
         }
 }
 
-static void do_softint(struct work_struct *ugly_api)
-{
-        struct riscom_port      *port = container_of(ugly_api, struct riscom_port, tqueue);
-        struct tty_struct       *tty;
-        
-        if(!(tty = port->tty)) 
-                return;
-
-        if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event))
-                tty_wakeup(tty);
-}
-
 static const struct tty_operations riscom_ops = {
         .open  = rc_open,
         .close = rc_close,
@@ -1650,8 +1609,6 @@ static int __init rc_init_drivers(void)
         memset(rc_port, 0, sizeof(rc_port));
         for (i = 0; i < RC_NPORT * RC_NBOARD; i++)  {
                 rc_port[i].magic = RISCOM8_MAGIC;
-                INIT_WORK(&rc_port[i].tqueue, do_softint);
-                INIT_WORK(&rc_port[i].tqueue_hangup, do_rc_hangup);
                 rc_port[i].close_delay = 50 * HZ/100;
                 rc_port[i].closing_wait = 3000 * HZ/100;
                 init_waitqueue_head(&rc_port[i].open_wait);