diff options
Diffstat (limited to 'drivers/char/tty_ioctl.c')
| -rw-r--r-- | drivers/char/tty_ioctl.c | 46 |
1 files changed, 22 insertions, 24 deletions
diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c index fd471cb3338f..3ee73cf64bd2 100644 --- a/drivers/char/tty_ioctl.c +++ b/drivers/char/tty_ioctl.c @@ -52,8 +52,6 @@ void tty_wait_until_sent(struct tty_struct * tty, long timeout) { - DECLARE_WAITQUEUE(wait, current); - #ifdef TTY_DEBUG_WAIT_UNTIL_SENT char buf[64]; @@ -61,26 +59,13 @@ void tty_wait_until_sent(struct tty_struct * tty, long timeout) #endif if (!tty->driver->chars_in_buffer) return; - add_wait_queue(&tty->write_wait, &wait); if (!timeout) timeout = MAX_SCHEDULE_TIMEOUT; - do { -#ifdef TTY_DEBUG_WAIT_UNTIL_SENT - printk(KERN_DEBUG "waiting %s...(%d)\n", tty_name(tty, buf), - tty->driver->chars_in_buffer(tty)); -#endif - set_current_state(TASK_INTERRUPTIBLE); - if (signal_pending(current)) - goto stop_waiting; - if (!tty->driver->chars_in_buffer(tty)) - break; - timeout = schedule_timeout(timeout); - } while (timeout); + if (wait_event_interruptible_timeout(tty->write_wait, + !tty->driver->chars_in_buffer(tty), timeout)) + return; if (tty->driver->wait_until_sent) tty->driver->wait_until_sent(tty, timeout); -stop_waiting: - set_current_state(TASK_RUNNING); - remove_wait_queue(&tty->write_wait, &wait); } EXPORT_SYMBOL(tty_wait_until_sent); @@ -276,13 +261,12 @@ void tty_termios_encode_baud_rate(struct ktermios *termios, speed_t ibaud, speed termios->c_cflag |= (baud_bits[i] << IBSHIFT); ifound = i; } - } - while(++i < n_baud_table); + } while (++i < n_baud_table); if (ofound == -1) termios->c_cflag |= BOTHER; /* Set exact input bits only if the input and output differ or the user already did */ - if (ifound == -1 && (ibaud != obaud || ibinput)) + if (ifound == -1 && (ibaud != obaud || ibinput)) termios->c_cflag |= (BOTHER << IBSHIFT); } @@ -575,7 +559,7 @@ static int set_sgttyb(struct tty_struct * tty, struct sgttyb __user * sgttyb) return -EFAULT; mutex_lock(&tty->termios_mutex); - termios = *tty->termios; + termios = *tty->termios; termios.c_cc[VERASE] = tmp.sg_erase; termios.c_cc[VKILL] = tmp.sg_kill; set_sgflags(&termios, tmp.sg_flags); @@ -667,7 +651,7 @@ static int send_prio_char(struct tty_struct *tty, char ch) return 0; } - if (mutex_lock_interruptible(&tty->atomic_write_lock)) + if (tty_write_lock(tty, 0) < 0) return -ERESTARTSYS; if (was_stopped) @@ -675,7 +659,7 @@ static int send_prio_char(struct tty_struct *tty, char ch) tty->driver->write(tty, &ch, 1); if (was_stopped) stop_tty(tty); - mutex_unlock(&tty->atomic_write_lock); + tty_write_unlock(tty); return 0; } @@ -811,6 +795,7 @@ int n_tty_ioctl(struct tty_struct * tty, struct file * file, if (L_ICANON(tty)) retval = inq_canon(tty); return put_user(retval, (unsigned int __user *) arg); +#ifndef TCGETS2 case TIOCGLCKTRMIOS: if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios_locked)) return -EFAULT; @@ -822,6 +807,19 @@ int n_tty_ioctl(struct tty_struct * tty, struct file * file, if (user_termios_to_kernel_termios(real_tty->termios_locked, (struct termios __user *) arg)) return -EFAULT; return 0; +#else + case TIOCGLCKTRMIOS: + if (kernel_termios_to_user_termios_1((struct termios __user *)arg, real_tty->termios_locked)) + return -EFAULT; + return 0; + + case TIOCSLCKTRMIOS: + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + if (user_termios_to_kernel_termios_1(real_tty->termios_locked, (struct termios __user *) arg)) + return -EFAULT; + return 0; +#endif case TIOCPKT: { |