From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: port multiplier problem Date: Thu, 04 Feb 2010 12:24:29 +0900 Message-ID: <4B6A3DED.6060708@kernel.org> References: <4B5885F7.2020007@gmail.com> <4B679EA9.6030203@kernel.org> <4B6833DD.1020001@gmail.com> <4B683581.7070708@kernel.org> <4B683DEF.3000302@gmail.com> <4B686B2B.2080406@gmail.com> <4B687B7C.2070406@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:40373 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754858Ab0BDDRv (ORCPT ); Wed, 3 Feb 2010 22:17:51 -0500 In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Grant Grundler Cc: Chandra Shekhar Sah , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org On 02/04/2010 11:37 AM, Grant Grundler wrote: > I had two questions on that thread that never got answered: > http://markmail.org/message/snpekoj4qexrslk5 > > | How can we find out if anyone has the SEMB properly wired up? > | Would it be hard to make libata aware of "SEMB port not responding" case? > | ie if the SEMB port times out or has no link, reduce the port count of > | the sil3726 PMP by one. > | > | Maybe add a "enable_sil24_semb" flag to libata? > | (avoid checking unless someone asks for it). I hate magic flags but also > | don't want to subject most people to the timeout delay. > > I (or Gwendal) can post a patch (and lightly test) for any of the above. > Just need to get some guidance so we don't waste our time. It's not really sil24 tho. But anyways, I think we can just disable them altogether. It's not like they have ever worked. Just limiting both 3726 and 4726 to 5 ports should be fine. That said, I'm not quite sure this is relevant to the reported problem but it's worth a shot. Thanks. -- tejun