From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752259AbdLLPuq (ORCPT ); Tue, 12 Dec 2017 10:50:46 -0500 Received: from www.llwyncelyn.cymru ([82.70.14.225]:54326 "EHLO fuzix.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751612AbdLLPuo (ORCPT ); Tue, 12 Dec 2017 10:50:44 -0500 Date: Tue, 12 Dec 2017 15:50:32 +0000 From: Alan Cox To: Christian Borntraeger Cc: Greg Kroah-Hartman , Jiri Slaby , linux-serial@vger.kernel.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] serial: forbid 8250 on s390 Message-ID: <20171212155032.2d5ece72@alans-desktop> In-Reply-To: <20171212080835.23610-1-borntraeger@de.ibm.com> References: <20171212080835.23610-1-borntraeger@de.ibm.com> Organization: Intel Corporation X-Mailer: Claws Mail 3.15.1-dirty (GTK+ 2.24.31; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 12 Dec 2017 09:08:35 +0100 Christian Borntraeger wrote: > Using "make kvmconfig" results in a potentially unusable linux image > on s390. The reason is that both the (default on s390) sclp consoles > as well as the 8250 console register a ttyS as console. Since there > will be no 8250 on s390 let's fence 8250. This will ensure that there > is always a working sclp console. And there is no physical way to attach a PCI express UART to a 390 ? Alan