From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: Re: [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled Date: Wed, 06 May 2015 18:12:51 +0200 Message-ID: <554A3D83.8040707@linutronix.de> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: linux-serial@vger.kernel.org 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