From mboxrd@z Thu Jan 1 00:00:00 1970 From: Govindraj Subject: Re: handling flow control for console device Date: Tue, 27 Apr 2010 20:09:06 +0530 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-qy0-f179.google.com ([209.85.221.179]:57285 "EHLO mail-qy0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752969Ab0D0OjH convert rfc822-to-8bit (ORCPT ); Tue, 27 Apr 2010 10:39:07 -0400 Received: by qyk9 with SMTP id 9so19426340qyk.1 for ; Tue, 27 Apr 2010 07:39:06 -0700 (PDT) In-Reply-To: Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: "Kittlitz, Edward (Ned)" Cc: "linux-serial@vger.kernel.org" On Wed, Apr 21, 2010 at 12:38 AM, Kittlitz, Edward (Ned) wrote: > Hello, > > I've been trying to figure out the Linux philosophy on > flow control for console devices. > > We have several situations where flow control > can stop bootup or normal operation. =A0For us, it's more > important that things keep running; console output has > lower priority. > > I thought there would be some way to forcibly disable > flow control for the console. But I can not find any way > to do it. =A0In my case, it's XOFF flow control. > During boot up most of tty drivers will be using tty_std_termios settin= gs when we do an uart_register_driver, init_termios will be set to tty_std= _termios. And looking into tty_std_termios we have .c_iflag =3D ICRNL | IXON, here IXON is enabled by default. tty_std_termios ---> "drivers/char/tty_io.c" --- Regards, Govindraj.R -- To unsubscribe from this list: send the line "unsubscribe linux-serial"= in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html