The patch titled
Char: riscom8, remove wakeup anf hangup bottomhalves
has been added to the -mm tree. Its filename is
char-riscom8-remove-wakeup-anf-hangup-bottomhalves.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Char: riscom8, remove wakeup anf hangup bottomhalves
From: Jiri Slaby <jirislaby@xxxxxxxxx>
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@xxxxxxxxx>
Acked-by: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/char/riscom8.c | 51 +++------------------------------------
drivers/char/riscom8.h | 3 --
2 files changed, 4 insertions(+), 50 deletions(-)
diff -puN drivers/char/riscom8.c~char-riscom8-remove-wakeup-anf-hangup-bottomhalves drivers/char/riscom8.c
--- a/drivers/char/riscom8.c~char-riscom8-remove-wakeup-anf-hangup-bottomhalves
+++ a/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 ri
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
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
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
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_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 *
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
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_st
}
}
-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);
diff -puN drivers/char/riscom8.h~char-riscom8-remove-wakeup-anf-hangup-bottomhalves drivers/char/riscom8.h
--- a/drivers/char/riscom8.h~char-riscom8-remove-wakeup-anf-hangup-bottomhalves
+++ a/drivers/char/riscom8.h
@@ -71,7 +71,6 @@ struct riscom_port {
struct tty_struct * tty;
int count;
int blocked_open;
- unsigned long event; /* long req'd for set_bit --RR */
int timeout;
int close_delay;
unsigned char * xmit_buf;
@@ -81,8 +80,6 @@ struct riscom_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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-
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