From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc St-Jean Subject: Re: [PATCH] serial driver PMC MSP71xx, kernel linux-mips.git mast er Date: Wed, 24 Jan 2007 08:40:57 -0800 Message-ID: <45B78C19.4030408@pmc-sierra.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Return-path: Received: from mother.pmc-sierra.com ([216.241.224.12]:54846 "HELO mother.pmc-sierra.bc.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752014AbXAXQlG (ORCPT ); Wed, 24 Jan 2007 11:41:06 -0500 Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Sergei Shtylyov Cc: linux-mips@linux-mips.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org Sergei Shtylyov wrote: > Hello, I wrote: > > >>>> Here is a serial driver patch for the PMC-Sierra MSP71xx device. > > >>>> There are three different fixes: > >>>> 1. Fix for THRE errata > >>>> 2. Fix for Busy Detect on LCR write > >>>> 3. Workaround for interrupt/data concurrency issue > > >>>> The first fix is handled cleanly using a UART_BUG_* flag. > > >>> Hm, I wouldn't call it clean... > > >> Relative to the other two. Any recommended improvements on this one? > > > I already told: runtime check. > > BTW, I've just came accross 2 patches in the -mm tree related to the > transmitter bug: > > http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20-rc4/2.6.20-rc4-mm1/broken-out/8250-make-probing-for-txen-bug-a-config-option.patch Thanks. The first of these is not at all what we are seeing. However I guess there could be a remote chance it's triggering our THRE errata as it did for the pnx4008 boards. > http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20-rc4/2.6.20-rc4-mm1/broken-out/8250-uart-backup-timer.patch This second patch failure description is identical to what we are seeing without the THRE work-around. This must be the timer patch Alan mentioned but it's not in the linux.git at l-m.o. Could you please explain what you mean by and where I can find the "-mm tree"? Marc