TTY: synclinkmp: fix DTR being raised on hang up
Make sure to check ASYNC_INITIALISED before raising DTR when waking up from blocked open in block_til_ready. Currently DTR could get raised at hang up as a blocked process would raise DTR unconditionally before checking for hang up and returning. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -3329,7 +3329,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
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port->blocked_open++;
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while (1) {
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if (tty->termios.c_cflag & CBAUD)
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if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags))
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tty_port_raise_dtr_rts(port);
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set_current_state(TASK_INTERRUPTIBLE);
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