From 5785c95baede8459d70c4aa0f7becb6e8b5fde4b Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Fri, 29 Sep 2006 02:00:43 -0700 Subject: [PATCH] tty: make termios_sem a mutex [akpm@osdl.org: fix] Cc: Alan Cox Cc: Arjan van de Ven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/tty_ioctl.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) (limited to 'drivers/char/tty_ioctl.c') diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c index 4ad47d321bd..4d540619ac8 100644 --- a/drivers/char/tty_ioctl.c +++ b/drivers/char/tty_ioctl.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -131,7 +132,7 @@ static void change_termios(struct tty_struct * tty, struct termios * new_termios /* FIXME: we need to decide on some locking/ordering semantics for the set_termios notification eventually */ - down(&tty->termios_sem); + mutex_lock(&tty->termios_mutex); *tty->termios = *new_termios; unset_locked_termios(tty->termios, &old_termios, tty->termios_locked); @@ -176,7 +177,7 @@ static void change_termios(struct tty_struct * tty, struct termios * new_termios (ld->set_termios)(tty, &old_termios); tty_ldisc_deref(ld); } - up(&tty->termios_sem); + mutex_unlock(&tty->termios_mutex); } /** @@ -284,13 +285,13 @@ static int get_sgttyb(struct tty_struct * tty, struct sgttyb __user * sgttyb) { struct sgttyb tmp; - down(&tty->termios_sem); + mutex_lock(&tty->termios_mutex); tmp.sg_ispeed = 0; tmp.sg_ospeed = 0; tmp.sg_erase = tty->termios->c_cc[VERASE]; tmp.sg_kill = tty->termios->c_cc[VKILL]; tmp.sg_flags = get_sgflags(tty); - up(&tty->termios_sem); + mutex_unlock(&tty->termios_mutex); return copy_to_user(sgttyb, &tmp, sizeof(tmp)) ? -EFAULT : 0; } @@ -345,12 +346,12 @@ static int set_sgttyb(struct tty_struct * tty, struct sgttyb __user * sgttyb) if (copy_from_user(&tmp, sgttyb, sizeof(tmp))) return -EFAULT; - down(&tty->termios_sem); + mutex_lock(&tty->termios_mutex); termios = *tty->termios; termios.c_cc[VERASE] = tmp.sg_erase; termios.c_cc[VKILL] = tmp.sg_kill; set_sgflags(&termios, tmp.sg_flags); - up(&tty->termios_sem); + mutex_unlock(&tty->termios_mutex); change_termios(tty, &termios); return 0; } @@ -592,11 +593,11 @@ int n_tty_ioctl(struct tty_struct * tty, struct file * file, case TIOCSSOFTCAR: if (get_user(arg, (unsigned int __user *) arg)) return -EFAULT; - down(&tty->termios_sem); + mutex_lock(&tty->termios_mutex); tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0)); - up(&tty->termios_sem); + mutex_unlock(&tty->termios_mutex); return 0; default: return -ENOIOCTLCMD; -- cgit v1.2.3