From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heikki Krogerus Subject: Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver Date: Wed, 17 Aug 2016 14:21:52 +0300 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-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: <1471432466.4887.134.camel@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: linux-serial@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