Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751922AbbEFQM7 (ORCPT ); Wed, 6 May 2015 12:12:59 -0400 Received: from www.linutronix.de ([62.245.132.108]:56745 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751330AbbEFQM4 (ORCPT ); Wed, 6 May 2015 12:12:56 -0400 Message-ID: <554A3D83.8040707@linutronix.de> Date: Wed, 06 May 2015 18:12:51 +0200 From: Sebastian Andrzej Siewior User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.6.0 MIME-Version: 1.0 To: Nicolae Rosia , jiwang CC: Sebastian Andrzej Siewior , gregkh@linuxfoundation.org, jslaby@suse.cz, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, anton_bondarenko@mentor.com, dirk.behme@de.bosch.com Subject: Re: [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled References: <1418116296-12082-1-git-send-email-jiada_wang@mentor.com> <1418116296-12082-12-git-send-email-jiada_wang@mentor.com> <20150409120057.GA12596@breakpoint.cc> <552B72DF.7060006@mentor.com> <20150413080637.GA1537@breakpoint.cc> <5530CFEF.9080807@mentor.com> In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1011 Lines: 29 On 05/06/2015 06:08 PM, Nicolae Rosia wrote: > Hi, > I believe I'm also affected by this BUG. I'm receiving lots of 0 and 1 > (ASCII, as presented by cat /dev/ttymxcX) and RX buffer is > overflowing. > >> the firmware only supports imx6 series, AFAIK, >> I checked with Freescale imx6 support team, due to >> licensing issue, I am not entitled to upstream FSL SDMA firmware. >> so seems currently disable SDMA support for uart is our only option >> at the moment. >> > > Have you submited a patch for this issue? > How do I disable SDMA? I reverted this patch. I am going to send a revert to Greg tomorrow including why this is done and CC stable. I haven't yet received a working SDMA firmware nor a hint where it is. > Best regards, > Nicolae Rosia Sebastian -- 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/