[PATCH] serial: keep the DTR setting for serial console. with reverting "x86, serial: convert legacy COM ports to platform devices", we will have the serial console before the port is probled again.
uart_add_one_port==>uart_configure_port==>set_mcttrl(port, 0) will clear the DTR setting by uart_set_options(). then I will lose my output from serial console again. So try to keep DTR in uart_configure_port() Signed-off-by: Yinghai Lu <[EMAIL PROTECTED]> Cc: Russell King <[EMAIL PROTECTED]> Cc: Alan Cox <[EMAIL PROTECTED]> Cc: Andi Kleen <[EMAIL PROTECTED]> Cc: Bjorn Helgaas <[EMAIL PROTECTED]> diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 030a606..70f1106 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -2117,10 +2117,11 @@ uart_configure_port(struct uart_driver *drv, struct uart_state *state, /* * Ensure that the modem control lines are de-activated. + * keep the DTR setting that is set in uart_set_options() * We probably don't need a spinlock around this, but */ spin_lock_irqsave(&port->lock, flags); - port->ops->set_mctrl(port, 0); + port->ops->set_mctrl(port, port->mctrl & TIOCM_DTR); spin_unlock_irqrestore(&port->lock, flags); /* - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/