Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753013AbbK2Caj (ORCPT ); Sat, 28 Nov 2015 21:30:39 -0500 Received: from mail-yk0-f181.google.com ([209.85.160.181]:33905 "EHLO mail-yk0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752788AbbK2Cai (ORCPT ); Sat, 28 Nov 2015 21:30:38 -0500 MIME-Version: 1.0 In-Reply-To: References: Date: Sun, 29 Nov 2015 04:30:37 +0200 Message-ID: Subject: Re: The console log is doubled if earlycon is enabled From: Andy Shevchenko To: Masahiro Yamada Cc: "linux-serial@vger.kernel.org" , Linux Kernel Mailing List , Greg Kroah-Hartman , Peter Hurley , Rob Herring Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 881 Lines: 29 On Fri, Nov 27, 2015 at 12:21 PM, Masahiro Yamada wrote: > Hi, > > > If I add "earlycon" to the kernel parameter, the log message > on the earlycon is also displayed to the regular console. > In other words, the same log messages are displayed twice. > > I noticed this problem on v4.4-rc1. > It has not been fixed in the mainline yet, I think. > > Anybody who has a clue? > (I have not done git-bisect yet.) Does adding the following line in drivers/tty/serial/8250/8250_early.c:: early_serial8250_setup() fix the issue? device->con->flags &= ~CON_PRINTBUFFER; -- With Best Regards, Andy Shevchenko -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/