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| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 00:54:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:47 -0700 |
| commit | 39c2e60f8c584c1b29b5c4375dd49df7995386bb (patch) | |
| tree | fcb7e742d38c6e4655660d89be01e61d58ceebc4 /drivers/char | |
| parent | 8cd64518a3d166a21f5c69ac7860b3add0369dd0 (diff) | |
| download | blackbird-op-linux-39c2e60f8c584c1b29b5c4375dd49df7995386bb.tar.gz blackbird-op-linux-39c2e60f8c584c1b29b5c4375dd49df7995386bb.zip | |
tty: add throttle/unthrottle helpers
Something Arjan suggested which allows us to clean up the code nicely
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/n_tty.c | 14 | ||||
| -rw-r--r-- | drivers/char/tty_ioctl.c | 16 |
2 files changed, 20 insertions, 10 deletions
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c index abc93a93dcdd..19105ec203f7 100644 --- a/drivers/char/n_tty.c +++ b/drivers/char/n_tty.c @@ -147,10 +147,8 @@ static void put_tty_queue(unsigned char c, struct tty_struct *tty) static void check_unthrottle(struct tty_struct *tty) { - if (tty->count && - test_and_clear_bit(TTY_THROTTLED, &tty->flags) && - tty->ops->unthrottle) - tty->ops->unthrottle(tty); + if (tty->count) + tty_unthrottle(tty); } /** @@ -982,12 +980,8 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, * mode. We don't want to throttle the driver if we're in * canonical mode and don't have a newline yet! */ - if (tty->receive_room < TTY_THRESHOLD_THROTTLE) { - /* check TTY_THROTTLED first so it indicates our state */ - if (!test_and_set_bit(TTY_THROTTLED, &tty->flags) && - tty->ops->throttle) - tty->ops->throttle(tty); - } + if (tty->receive_room < TTY_THRESHOLD_THROTTLE) + tty_throttle(tty); } int is_ignored(int sig) diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c index c10d40c4c5ca..b1a757a5ee27 100644 --- a/drivers/char/tty_ioctl.c +++ b/drivers/char/tty_ioctl.c @@ -67,6 +67,22 @@ void tty_driver_flush_buffer(struct tty_struct *tty) EXPORT_SYMBOL(tty_driver_flush_buffer); +void tty_throttle(struct tty_struct *tty) +{ + /* check TTY_THROTTLED first so it indicates our state */ + if (!test_and_set_bit(TTY_THROTTLED, &tty->flags) && + tty->ops->throttle) + tty->ops->throttle(tty); +} +EXPORT_SYMBOL(tty_throttle); + +void tty_unthrottle(struct tty_struct *tty) +{ + if (test_and_clear_bit(TTY_THROTTLED, &tty->flags) && + tty->ops->unthrottle) + tty->ops->unthrottle(tty); +} +EXPORT_SYMBOL(tty_unthrottle); /** * tty_wait_until_sent - wait for I/O to finish |
