Reduce the monolithic n_tty_receive_char() complexity; factor the handling of INTR_CHAR, QUIT_CHAR and SUSP_CHAR into n_tty_receive_signal_char().
Signed-off-by: Peter Hurley <[email protected]> --- drivers/tty/n_tty.c | 52 ++++++++++++++++++++++++++++------------------------ 1 file changed, 28 insertions(+), 24 deletions(-) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index b379986..e8df595 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1219,6 +1219,26 @@ static inline void n_tty_receive_parity_error(struct tty_struct *tty, wake_up_interruptible(&tty->read_wait); } +static void +n_tty_receive_signal_char(struct tty_struct *tty, int signal, unsigned char c) +{ + if (!L_NOFLSH(tty)) { + /* flushing needs exclusive termios_rwsem */ + up_read(&tty->termios_rwsem); + n_tty_flush_buffer(tty); + tty_driver_flush_buffer(tty); + down_read(&tty->termios_rwsem); + } + if (I_IXON(tty)) + start_tty(tty); + if (L_ECHO(tty)) { + echo_char(c, tty); + commit_echoes(tty); + } + isig(signal, tty); + return; +} + /** * n_tty_receive_char - perform processing * @tty: terminal device @@ -1314,30 +1334,14 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c) } if (L_ISIG(tty)) { - int signal; - signal = SIGINT; - if (c == INTR_CHAR(tty)) - goto send_signal; - signal = SIGQUIT; - if (c == QUIT_CHAR(tty)) - goto send_signal; - signal = SIGTSTP; - if (c == SUSP_CHAR(tty)) { -send_signal: - if (!L_NOFLSH(tty)) { - /* flushing needs exclusive termios_rwsem */ - up_read(&tty->termios_rwsem); - n_tty_flush_buffer(tty); - tty_driver_flush_buffer(tty); - down_read(&tty->termios_rwsem); - } - if (I_IXON(tty)) - start_tty(tty); - if (L_ECHO(tty)) { - echo_char(c, tty); - commit_echoes(tty); - } - isig(signal, tty); + if (c == INTR_CHAR(tty)) { + n_tty_receive_signal_char(tty, SIGINT, c); + return; + } else if (c == QUIT_CHAR(tty)) { + n_tty_receive_signal_char(tty, SIGQUIT, c); + return; + } else if (c == SUSP_CHAR(tty)) { + n_tty_receive_signal_char(tty, SIGTSTP, c); return; } } -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
