Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751356AbdGQLfA (ORCPT ); Mon, 17 Jul 2017 07:35:00 -0400 Received: from mail-ua0-f194.google.com ([209.85.217.194]:33627 "EHLO mail-ua0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751286AbdGQLe6 (ORCPT ); Mon, 17 Jul 2017 07:34:58 -0400 MIME-Version: 1.0 In-Reply-To: References: <20170620153701.12626-1-clemens.gruber@pqgruber.com> From: Fabio Estevam Date: Mon, 17 Jul 2017 08:34:56 -0300 Message-ID: Subject: Re: [Customers.Eckelmann] [PATCH] serial: imx: disable DMA for RS-485 on i.MX6 SMP To: "Schenk, Gavin" Cc: Clemens Gruber , "linux-serial@vger.kernel.org" , Greg Kroah-Hartman , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" , "u.kleine-koenig@pengutronix.de" , Fabio Estevam , Ian Jamison 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-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by nfs id v6HBZ3d2002227 Content-Length: 337 Lines: 10 Hi Gavin, On Fri, Jun 23, 2017 at 6:26 AM, Schenk, Gavin wrote: > Uwe Kleine-König had the idea to disable DMA on the i.MX6dl based platform via dts and this is our current workaround. Please test Ian's patch: http://marc.info/?l=linux-serial&m=150005865213531&w=2 It should fix this DMA problem with RS485.