diff options
author | Jiri Slaby <jirislaby@gmail.com> | 2008-02-07 00:16:37 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 08:42:34 -0800 |
commit | d2e7a4b66d762cad383c5469c1e8b6076792ab6a (patch) | |
tree | 8516adc2f15b67cfc5b802912b379357928eb48f /drivers/char/esp.c | |
parent | 1386a820b32285583414a8db3a99305e7ebe8377 (diff) | |
download | linux-d2e7a4b66d762cad383c5469c1e8b6076792ab6a.tar.gz linux-d2e7a4b66d762cad383c5469c1e8b6076792ab6a.tar.bz2 linux-d2e7a4b66d762cad383c5469c1e8b6076792ab6a.zip |
Char: esp, remove hangup and wakeup bottomhalves
There is no need to schedule a bottomhalf for either of them. One is fast
and the another schedules a bottomhalf itself.
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>
Diffstat (limited to 'drivers/char/esp.c')
-rw-r--r-- | drivers/char/esp.c | 58 |
1 files changed, 5 insertions, 53 deletions
diff --git a/drivers/char/esp.c b/drivers/char/esp.c index b5df2dc40491..c01e26d9ee5e 100644 --- a/drivers/char/esp.c +++ b/drivers/char/esp.c @@ -242,17 +242,6 @@ static void rs_start(struct tty_struct *tty) * ----------------------------------------------------------------------- */ -/* - * This routine is used by the interrupt handler to schedule - * processing in the software interrupt portion of the driver. - */ -static inline void rs_sched_event(struct esp_struct *info, - int event) -{ - info->event |= 1 << event; - schedule_work(&info->tqueue); -} - static DEFINE_SPINLOCK(pio_lock); static inline struct esp_pio_buffer *get_pio_buffer(void) @@ -474,7 +463,8 @@ static inline void transmit_chars_pio(struct esp_struct *info, } if (info->xmit_cnt < WAKEUP_CHARS) { - rs_sched_event(info, ESP_EVENT_WRITE_WAKEUP); + if (info->tty) + tty_wakeup(info->tty); #ifdef SERIAL_DEBUG_INTR printk("THRE..."); @@ -512,7 +502,8 @@ static inline void transmit_chars_dma(struct esp_struct *info, int num_bytes) info->xmit_tail = (info->xmit_tail + dma_bytes) & (ESP_XMIT_SIZE - 1); if (info->xmit_cnt < WAKEUP_CHARS) { - rs_sched_event(info, ESP_EVENT_WRITE_WAKEUP); + if (info->tty) + tty_wakeup(info->tty); #ifdef SERIAL_DEBUG_INTR printk("THRE..."); @@ -604,7 +595,7 @@ static inline void check_modem_status(struct esp_struct *info) #ifdef SERIAL_DEBUG_OPEN printk("scheduling hangup..."); #endif - schedule_work(&info->tqueue_hangup); + tty_hangup(info->tty); } } } @@ -720,41 +711,6 @@ static irqreturn_t rs_interrupt_single(int irq, void *dev_id) * ------------------------------------------------------------------- */ -static void do_softint(struct work_struct *work) -{ - struct esp_struct *info = - container_of(work, struct esp_struct, tqueue); - struct tty_struct *tty; - - tty = info->tty; - if (!tty) - return; - - if (test_and_clear_bit(ESP_EVENT_WRITE_WAKEUP, &info->event)) { - tty_wakeup(tty); - } -} - -/* - * 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: - * - * serial interrupt routine -> (scheduler tqueue) -> - * do_serial_hangup() -> tty->hangup() -> esp_hangup() - * - */ -static void do_serial_hangup(struct work_struct *work) -{ - struct esp_struct *info = - container_of(work, struct esp_struct, tqueue_hangup); - struct tty_struct *tty; - - tty = info->tty; - if (tty) - tty_hangup(tty); -} - /* * --------------------------------------------------------------- * Low level utility subroutines for the serial driver: routines to @@ -2038,7 +1994,6 @@ static void rs_close(struct tty_struct *tty, struct file * filp) tty->driver->flush_buffer(tty); tty_ldisc_flush(tty); tty->closing = 0; - info->event = 0; info->tty = NULL; if (info->blocked_open) { @@ -2106,7 +2061,6 @@ static void esp_hangup(struct tty_struct *tty) rs_flush_buffer(tty); shutdown(info); - info->event = 0; info->count = 0; info->flags &= ~ASYNC_NORMAL_ACTIVE; info->tty = NULL; @@ -2492,8 +2446,6 @@ static int __init espserial_init(void) info->magic = ESP_MAGIC; info->close_delay = 5*HZ/10; info->closing_wait = 30*HZ; - INIT_WORK(&info->tqueue, do_softint); - INIT_WORK(&info->tqueue_hangup, do_serial_hangup); info->config.rx_timeout = rx_timeout; info->config.flow_on = flow_on; info->config.flow_off = flow_off; |