diff options
Diffstat (limited to 'drivers/s390/char/con3215.c')
| -rw-r--r-- | drivers/s390/char/con3215.c | 59 |
1 files changed, 13 insertions, 46 deletions
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c index 671efee612af..1fd5bca9fa20 100644 --- a/drivers/s390/char/con3215.c +++ b/drivers/s390/char/con3215.c @@ -85,7 +85,6 @@ struct raw3215_info { int written; /* number of bytes in write requests */ struct raw3215_req *queued_read; /* pointer to queued read requests */ struct raw3215_req *queued_write;/* pointer to queued write requests */ - struct tasklet_struct tlet; /* tasklet to invoke tty_wakeup */ wait_queue_head_t empty_wait; /* wait queue for flushing */ struct timer_list timer; /* timer for delayed output */ int line_pos; /* position on the line (for tabs) */ @@ -99,7 +98,7 @@ static DEFINE_SPINLOCK(raw3215_device_lock); /* list of free request structures */ static struct raw3215_req *raw3215_freelist; /* spinlock to protect free list */ -static spinlock_t raw3215_freelist_lock; +static DEFINE_SPINLOCK(raw3215_freelist_lock); static struct tty_driver *tty3215_driver; @@ -330,21 +329,6 @@ static inline void raw3215_try_io(struct raw3215_info *raw) } /* - * Call tty_wakeup from tasklet context - */ -static void raw3215_wakeup(unsigned long data) -{ - struct raw3215_info *raw = (struct raw3215_info *) data; - struct tty_struct *tty; - - tty = tty_port_tty_get(&raw->port); - if (tty) { - tty_wakeup(tty); - tty_kref_put(tty); - } -} - -/* * Try to start the next IO and wake up processes waiting on the tty. */ static void raw3215_next_io(struct raw3215_info *raw, struct tty_struct *tty) @@ -352,7 +336,7 @@ static void raw3215_next_io(struct raw3215_info *raw, struct tty_struct *tty) raw3215_mk_write_req(raw); raw3215_try_io(raw); if (tty && RAW3215_BUFFER_SIZE - raw->count >= RAW3215_MIN_SPACE) - tasklet_schedule(&raw->tlet); + tty_wakeup(tty); } /* @@ -644,7 +628,6 @@ static struct raw3215_info *raw3215_alloc_info(void) timer_setup(&info->timer, raw3215_timeout, 0); init_waitqueue_head(&info->empty_wait); - tasklet_init(&info->tlet, raw3215_wakeup, (unsigned long)info); tty_port_init(&info->port); return info; @@ -850,7 +833,6 @@ static int __init con3215_init(void) /* allocate 3215 request structures */ raw3215_freelist = NULL; - spin_lock_init(&raw3215_freelist_lock); for (i = 0; i < NR_3215_REQ; i++) { req = kzalloc(sizeof(struct raw3215_req), GFP_KERNEL | GFP_DMA); if (!req) @@ -928,15 +910,13 @@ static int tty3215_open(struct tty_struct *tty, struct file * filp) */ static void tty3215_close(struct tty_struct *tty, struct file * filp) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; - raw = (struct raw3215_info *) tty->driver_data; if (raw == NULL || tty->count > 1) return; tty->closing = 1; /* Shutdown the terminal */ raw3215_shutdown(raw); - tasklet_kill(&raw->tlet); tty->closing = 0; tty_port_tty_set(&raw->port, NULL); } @@ -946,9 +926,7 @@ static void tty3215_close(struct tty_struct *tty, struct file * filp) */ static int tty3215_write_room(struct tty_struct *tty) { - struct raw3215_info *raw; - - raw = (struct raw3215_info *) tty->driver_data; + struct raw3215_info *raw = tty->driver_data; /* Subtract TAB_STOP_SIZE to allow for a tab, 8 <<< 64K */ if ((RAW3215_BUFFER_SIZE - raw->count - TAB_STOP_SIZE) >= 0) @@ -963,12 +941,9 @@ static int tty3215_write_room(struct tty_struct *tty) static int tty3215_write(struct tty_struct * tty, const unsigned char *buf, int count) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; int i, written; - if (!tty) - return 0; - raw = (struct raw3215_info *) tty->driver_data; written = count; while (count > 0) { for (i = 0; i < count; i++) @@ -991,12 +966,10 @@ static int tty3215_write(struct tty_struct * tty, */ static int tty3215_put_char(struct tty_struct *tty, unsigned char ch) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; - if (!tty) - return 0; - raw = (struct raw3215_info *) tty->driver_data; raw3215_putchar(raw, ch); + return 1; } @@ -1009,17 +982,15 @@ static void tty3215_flush_chars(struct tty_struct *tty) */ static int tty3215_chars_in_buffer(struct tty_struct *tty) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; - raw = (struct raw3215_info *) tty->driver_data; return raw->count; } static void tty3215_flush_buffer(struct tty_struct *tty) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; - raw = (struct raw3215_info *) tty->driver_data; raw3215_flush_buffer(raw); tty_wakeup(tty); } @@ -1029,9 +1000,8 @@ static void tty3215_flush_buffer(struct tty_struct *tty) */ static void tty3215_throttle(struct tty_struct * tty) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; - raw = (struct raw3215_info *) tty->driver_data; raw->flags |= RAW3215_THROTTLED; } @@ -1040,10 +1010,9 @@ static void tty3215_throttle(struct tty_struct * tty) */ static void tty3215_unthrottle(struct tty_struct * tty) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; unsigned long flags; - raw = (struct raw3215_info *) tty->driver_data; if (raw->flags & RAW3215_THROTTLED) { spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); raw->flags &= ~RAW3215_THROTTLED; @@ -1057,9 +1026,8 @@ static void tty3215_unthrottle(struct tty_struct * tty) */ static void tty3215_stop(struct tty_struct *tty) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; - raw = (struct raw3215_info *) tty->driver_data; raw->flags |= RAW3215_STOPPED; } @@ -1068,10 +1036,9 @@ static void tty3215_stop(struct tty_struct *tty) */ static void tty3215_start(struct tty_struct *tty) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; unsigned long flags; - raw = (struct raw3215_info *) tty->driver_data; if (raw->flags & RAW3215_STOPPED) { spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); raw->flags &= ~RAW3215_STOPPED; |