From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752933AbcHQLWH (ORCPT ); Wed, 17 Aug 2016 07:22:07 -0400 Received: from mga01.intel.com ([192.55.52.88]:47641 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752302AbcHQLV5 (ORCPT ); Wed, 17 Aug 2016 07:21:57 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,529,1464678000"; d="scan'208";a="1015881320" Date: Wed, 17 Aug 2016 14:21:52 +0300 From: Heikki Krogerus To: Andy Shevchenko Cc: Thorsten Leemhuis , dinh.linux@anniebear.net, Dinh Nguyen , peter@hurleysoftware.com, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver Message-ID: <20160817112152.GR9927@kuha.fi.intel.com> References: <575F7325.3030907@kernel.org> <1465897220.30123.26.camel@linux.intel.com> <1465920046.30123.83.camel@linux.intel.com> <1471432466.4887.134.camel@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1471432466.4887.134.camel@linux.intel.com> User-Agent: Mutt/1.6.2 (2016-07-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 17, 2016 at 02:14:26PM +0300, Andy Shevchenko wrote: > On Sat, 2016-07-02 at 13:53 +0200, Thorsten Leemhuis wrote: > > On 14.06.2016 18:00, Andy Shevchenko wrote: > > > > > > On Tue, 2016-06-14 at 10:27 -0500, dinh.linux@anniebear.net wrote: > > > > > > > > > > > > > > On Mon, 2016-06-13 at 21:59 -0500, Dinh Nguyen wrote: > > > > Does this mean that the 8250_dw.c driver can no longer use DMA? > > > > > > It means that previously the use of DMA engine whatever was used is > > > not > > > correct in your case. There is no issues in UART driver, the issue > > > is in > > > DMA controller driver. > > > > > > I'm working on a quirk that will allow user to enforce PIO mode for > > > Rx/Tx or both. In that case if DMA controller can't be fixed you > > > still > > > might use DMA for Tx. > > > > What's the status of this issue? Just wondering, as this issue is > > listed > > in my regression reports for 4.7 and it seems nothing much happened > > for > > more than a week now – which is a bad sign as the 4.7 release seems > > only > > a week or two away. > > I sent a v2 of the series for internal review, same you may found on > [1]. If Heikki is okay to that I'll send it here. > > [1] https://bitbucket.org/andy-shev/linux/branch/topic%2Fdw%2Fqrk Go for it. Thanks, -- heikki