diff options
Diffstat (limited to 'drivers/tty/n_tty.c')
| -rw-r--r-- | drivers/tty/n_tty.c | 46 |
1 files changed, 20 insertions, 26 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 0cb0e12f87c7..112eda7c56bc 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -2197,34 +2197,28 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file, if (!input_available_p(tty, 0)) { if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) { - up_read(&tty->termios_rwsem); - tty_flush_to_ldisc(tty); - down_read(&tty->termios_rwsem); - if (!input_available_p(tty, 0)) { - retval = -EIO; - break; - } - } else { - if (tty_hung_up_p(file)) - break; - if (!timeout) - break; - if (file->f_flags & O_NONBLOCK) { - retval = -EAGAIN; - break; - } - if (signal_pending(current)) { - retval = -ERESTARTSYS; - break; - } - n_tty_set_room(tty); - up_read(&tty->termios_rwsem); + retval = -EIO; + break; + } + if (tty_hung_up_p(file)) + break; + if (!timeout) + break; + if (file->f_flags & O_NONBLOCK) { + retval = -EAGAIN; + break; + } + if (signal_pending(current)) { + retval = -ERESTARTSYS; + break; + } + n_tty_set_room(tty); + up_read(&tty->termios_rwsem); - timeout = schedule_timeout(timeout); + timeout = schedule_timeout(timeout); - down_read(&tty->termios_rwsem); - continue; - } + down_read(&tty->termios_rwsem); + continue; } __set_current_state(TASK_RUNNING); |