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    Subject[PATCH v3 2/6] TTY: wake up processes last at hangup
    Date
    Move wake up of processes on blocked-open and modem-status wait queues
    to after port shutdown at hangup.

    This way the woken up processes can use the ASYNC_INITIALIZED flag to
    detect port shutdown.

    Note that this is the order currently used by serial-core.

    Signed-off-by: Johan Hovold <jhovold@gmail.com>
    ---
    drivers/tty/tty_port.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
    index 57a061e..3de5918 100644
    --- a/drivers/tty/tty_port.c
    +++ b/drivers/tty/tty_port.c
    @@ -231,9 +231,9 @@ void tty_port_hangup(struct tty_port *port)
    }
    port->tty = NULL;
    spin_unlock_irqrestore(&port->lock, flags);
    + tty_port_shutdown(port);
    wake_up_interruptible(&port->open_wait);
    wake_up_interruptible(&port->delta_msr_wait);
    - tty_port_shutdown(port);
    }
    EXPORT_SYMBOL(tty_port_hangup);

    --
    1.8.1.1


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