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Subject[PATCH] taskqueue to workqueue update for riscom8 driver
Date
This patch updates the Riscom8 driver with the workqueue interface. It applies to the 2.5.63 kernel. Please apply.

diff -Naur -X /home/Amit/lib/dontdiff a/drivers/char/riscom8.c b/drivers/char/riscom8.c
--- a/drivers/char/riscom8.c Fri Feb 28 19:49:11 2003
+++ b/drivers/char/riscom8.c Sat Mar 1 16:59:35 2003
@@ -29,6 +29,9 @@
* ChangeLog:
* Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 27-Jun-2001
* - get rid of check_region and several cleanups
+ *
+ * Amit Shah <amitshah@gmx.net> - 1-Mar-2003
+ * - update all the task queues to work queues.
*/

#include <linux/module.h>
@@ -81,8 +84,6 @@

#define RS_EVENT_WRITE_WAKEUP 0

-static DECLARE_TASK_QUEUE(tq_riscom);
-
#define RISCOM_TYPE_NORMAL 1
#define RISCOM_TYPE_CALLOUT 2

@@ -346,10 +347,11 @@
* serving for all serial drivers.
* For now I must introduce another one - RISCOM8_BH.
* Still hope this will be changed in near future.
- */
+ *
+ * FIXME: update this comment for the workqueue interface.
+ */
set_bit(event, &port->event);
- queue_task(&port->tqueue, &tq_riscom);
- mark_bh(RISCOM8_BH);
+ schedule_work(&port->work);
}

static inline struct riscom_port * rc_get_port(struct riscom_board const * bp,
@@ -432,7 +434,7 @@

*tty->flip.char_buf_ptr++ = ch;
tty->flip.count++;
- queue_task(&tty->flip.tqueue, &tq_timer);
+ schedule_delayed_work(&tty->flip.work, 1);
}

static inline void rc_receive(struct riscom_board const * bp)
@@ -463,7 +465,7 @@
*tty->flip.flag_buf_ptr++ = 0;
tty->flip.count++;
}
- queue_task(&tty->flip.tqueue, &tq_timer);
+ schedule_delayed_work(&tty->flip.work, 1);
}

static inline void rc_transmit(struct riscom_board const * bp)
@@ -553,7 +555,7 @@
else if (!((port->flags & ASYNC_CALLOUT_ACTIVE) &&
(port->flags & ASYNC_CALLOUT_NOHUP))) {
MOD_INC_USE_COUNT;
- if (schedule_task(&port->tqueue_hangup) == 0)
+ if (schedule_work(&port->work_hangup) == 0)
MOD_DEC_USE_COUNT;
}
}
@@ -1660,11 +1662,11 @@
}

/*
- * This routine is called from the scheduler tqueue when the interrupt
- * routine has signalled that a hangup has occurred. The path of
- * hangup processing is:
+ * This routine is called from the scheduler work queue when the
+ * interrupt routine has signalled that a hangup has occurred. The
+ * path of hangup processing is:
*
- * serial interrupt routine -> (scheduler tqueue) ->
+ * serial interrupt routine -> (scheduler workqueue) ->
* do_rc_hangup() -> tty->hangup() -> rc_hangup()
*
*/
@@ -1720,11 +1722,6 @@
}
}

-static void do_riscom_bh(void)
-{
- run_task_queue(&tq_riscom);
-}
-
static void do_softint(void *private_)
{
struct riscom_port *port = (struct riscom_port *) private_;
@@ -1751,7 +1748,6 @@
printk(KERN_ERR "rc: Couldn't get free page.\n");
return 1;
}
- init_bh(RISCOM8_BH, do_riscom_bh);
memset(IRQ_to_board, 0, sizeof(IRQ_to_board));
memset(&riscom_driver, 0, sizeof(riscom_driver));
riscom_driver.magic = TTY_DRIVER_MAGIC;
@@ -1811,10 +1807,10 @@
rc_port[i].callout_termios = riscom_callout_driver.init_termios;
rc_port[i].normal_termios = riscom_driver.init_termios;
rc_port[i].magic = RISCOM8_MAGIC;
- rc_port[i].tqueue.routine = do_softint;
- rc_port[i].tqueue.data = &rc_port[i];
- rc_port[i].tqueue_hangup.routine = do_rc_hangup;
- rc_port[i].tqueue_hangup.data = &rc_port[i];
+
+ INIT_WORK(&rc_port[i].work, do_softint, &rc_port[i]);
+ INIT_WORK(&rc_port[i].work_hangup, do_rc_hangup, &rc_port[i]);
+
rc_port[i].close_delay = 50 * HZ/100;
rc_port[i].closing_wait = 3000 * HZ/100;
init_waitqueue_head(&rc_port[i].open_wait);
@@ -1830,7 +1826,6 @@

save_flags(flags);
cli();
- remove_bh(RISCOM8_BH);
free_page((unsigned long)tmp_buf);
tty_unregister_driver(&riscom_driver);
tty_unregister_driver(&riscom_callout_driver);
diff -Naur -X /home/Amit/lib/dontdiff a/drivers/char/riscom8.h b/drivers/char/riscom8.h
--- a/drivers/char/riscom8.h Wed Feb 19 15:45:10 2003
+++ b/drivers/char/riscom8.h Sat Mar 1 16:59:17 2003
@@ -85,8 +85,8 @@
struct termios callout_termios;
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
- struct work_struct tqueue;
- struct work_struct tqueue_hangup;
+ struct work_struct work;
+ struct work_struct work_hangup;
short wakeup_chars;
short break_length;
unsigned short closing_wait;
--
Amit Shah
http://amitshah.nav.to/

The most exciting phrase to hear in science, the one that heralds new
discoveries, is not "Eureka!" (I found it!) but "That's funny ..."
-- Isaac Asimov



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