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Message-id: <2911266842179631383.slaby@pripojeni.net>
Date: Fri, 9 Nov 2007 18:40:49 -0500
From: Jiri Slaby <jirislaby@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: [PATCH 3/6] Char: specialix, remove bottomhalves
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@...il.com>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
---
commit fb6091801dc98a44bd22f04acd4e66524eb0be9c
tree 7c495c5b0bc2982c18f321016939eb7977790709
parent d55ce2f15b7233e7a4e5e1880a656c4160b69866
author Jiri Slaby <jirislaby@...il.com> Mon, 05 Nov 2007 16:26:50 +0100
committer Jiri Slaby <jirislaby@...il.com> Fri, 09 Nov 2007 22:42:41 +0100
drivers/char/specialix.c | 72 ++----------------------------------------
drivers/char/specialix_io8.h | 3 --
2 files changed, 4 insertions(+), 71 deletions(-)
diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index 4558556..c0e08c7 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 895bd90..3f2f85b 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;
-
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