From 47afa7a5a8a8fb9e60cdb6a3bd612e07c37e9d90 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 13 Oct 2008 10:44:17 +0100 Subject: tty: some ICANON magic is in the wrong places Move the set up on ldisc change into the ldisc Move the INQ/OUTQ cases into the driver not in shared ioctl code where it gives bogus answers for other ldisc values Signed-off-by: Alan Cox Signed-off-by: Linus Torvalds --- drivers/char/tty_ioctl.c | 42 ++---------------------------------------- 1 file changed, 2 insertions(+), 40 deletions(-) (limited to 'drivers/char/tty_ioctl.c') diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c index 14cc19c344c..a408c8e487e 100644 --- a/drivers/char/tty_ioctl.c +++ b/drivers/char/tty_ioctl.c @@ -489,7 +489,6 @@ EXPORT_SYMBOL(tty_termios_hw_change); static void change_termios(struct tty_struct *tty, struct ktermios *new_termios) { - int canon_change; struct ktermios old_termios; struct tty_ldisc *ld; unsigned long flags; @@ -505,18 +504,6 @@ static void change_termios(struct tty_struct *tty, struct ktermios *new_termios) old_termios = *tty->termios; *tty->termios = *new_termios; unset_locked_termios(tty->termios, &old_termios, tty->termios_locked); - canon_change = (old_termios.c_lflag ^ tty->termios->c_lflag) & ICANON; - if (canon_change) { - memset(&tty->read_flags, 0, sizeof tty->read_flags); - tty->canon_head = tty->read_tail; - tty->canon_data = 0; - tty->erasing = 0; - } - - /* This bit should be in the ldisc code */ - if (canon_change && !L_ICANON(tty) && tty->read_cnt) - /* Get characters left over from canonical mode. */ - wake_up_interruptible(&tty->read_wait); /* See if packet mode change of state. */ if (tty->link && tty->link->packet) { @@ -677,24 +664,6 @@ static int set_termiox(struct tty_struct *tty, void __user *arg, int opt) #endif -static unsigned long inq_canon(struct tty_struct *tty) -{ - int nr, head, tail; - - if (!tty->canon_data || !tty->read_buf) - return 0; - head = tty->canon_head; - tail = tty->read_tail; - nr = (head - tail) & (N_TTY_BUF_SIZE-1); - /* Skip EOF-chars.. */ - while (head != tail) { - if (test_bit(tail, tty->read_flags) && - tty->read_buf[tail] == __DISABLED_CHAR) - nr--; - tail = (tail+1) & (N_TTY_BUF_SIZE-1); - } - return nr; -} #ifdef TIOCGETP /* @@ -1110,7 +1079,7 @@ int tty_perform_flush(struct tty_struct *tty, unsigned long arg) } EXPORT_SYMBOL_GPL(tty_perform_flush); -int n_tty_ioctl(struct tty_struct *tty, struct file *file, +int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { unsigned long flags; @@ -1148,13 +1117,6 @@ int n_tty_ioctl(struct tty_struct *tty, struct file *file, return 0; case TCFLSH: return tty_perform_flush(tty, arg); - case TIOCOUTQ: - return put_user(tty_chars_in_buffer(tty), (int __user *) arg); - case TIOCINQ: - retval = tty->read_cnt; - if (L_ICANON(tty)) - retval = inq_canon(tty); - return put_user(retval, (unsigned int __user *) arg); case TIOCPKT: { int pktmode; @@ -1180,4 +1142,4 @@ int n_tty_ioctl(struct tty_struct *tty, struct file *file, return tty_mode_ioctl(tty, file, cmd, arg); } } -EXPORT_SYMBOL(n_tty_ioctl); +EXPORT_SYMBOL(n_tty_ioctl_helper); -- cgit v1.2.3