Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752093AbcDWRYG (ORCPT ); Sat, 23 Apr 2016 13:24:06 -0400 Received: from mail-pa0-f48.google.com ([209.85.220.48]:33773 "EHLO mail-pa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751964AbcDWRYD (ORCPT ); Sat, 23 Apr 2016 13:24:03 -0400 Message-ID: <571BAFB0.1080303@gmail.com> Date: Sat, 23 Apr 2016 10:24:00 -0700 From: Frank Rowand Reply-To: frowand.list@gmail.com User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: Ivan Ivanov CC: Andy Shevchenko , Peter Hurley , "Krogerus, Heikki" , Andy Gross , David Brown , srinivas.kandagatla@linaro.org, Greg Kroah-Hartman , Jiri Slaby , Pawel Moll , Mark Rutland , Linux Kernel list , "linux-serial@vger.kernel.org" Subject: Re: regression: 3a878c430fd6 ("tty: serial: msm: Add TX DMA support") drops data References: <5716BDF1.1010407@gmail.com> <5717B2CA.3020206@gmail.com> <57182635.5070606@gmail.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 649 Lines: 23 On 4/21/2016 1:42 PM, Andy Shevchenko wrote: > On Thu, Apr 21, 2016 at 4:00 AM, Frank Rowand wrote: >> On 4/20/2016 9:48 AM, Frank Rowand wrote: < snip > >> I'm not sure if the driver was in DMA or PIO mode, both >> before the change and after. This seems like a rather >> important question to answer, so I'll try to verify >> that tonight. I was in PIO mode. I found the problem and submitted a fix. [PATCH 0/2] tty: serial: msm_serial regression and add info message [PATCH 1/2] tty: serial: msm_serial regression fix data corruption [PATCH 2/2] tty: serial: msm_serial add info message < snip > -Frank