From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roger Quadros Subject: Re: L2 cache stability workaround for 4460 ES1.0 Date: Mon, 2 Apr 2012 10:55:34 +0300 Message-ID: <4F795B76.3030002@ti.com> References: <4F794D5D.3090509@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from comal.ext.ti.com ([198.47.26.152]:58847 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751027Ab2DBHzg (ORCPT ); Mon, 2 Apr 2012 03:55:36 -0400 Received: from dlep26.itg.ti.com ([157.170.170.121]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id q327taq0017129 for ; Mon, 2 Apr 2012 02:55:36 -0500 Received: from DFLE71.ent.ti.com (localhost [127.0.0.1]) by dlep26.itg.ti.com (8.13.8/8.13.8) with ESMTP id q327ta5u020582 for ; Mon, 2 Apr 2012 02:55:36 -0500 (CDT) In-Reply-To: Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: "Shilimkar, Santosh" Cc: "Dechesne, Nicolas" , "linux-omap@vger.kernel.org" On 04/02/2012 10:38 AM, Shilimkar, Santosh wrote: > On Mon, Apr 2, 2012 at 12:25 PM, Roger Quadros wrote: >> Hi Santosh, >> >> I came across the attached patch from you. I also came across this post >> stating that it was decided not to send this patch upstream. >> >> http://www.digipedia.pl/usenet/thread/18885/8437/#post8496 >> >> The problem is that we have to keep porting this patch each time we >> update the kernel. >> >> Do you know if the root cause has been found? If not can we have this >> patch upstream till the root cause is found? >> > Yes and fixed in OMAP4460 ES1.2. Did you mean ES1.1? Could you please point me to the errata ID? The only cache related errata I can see is Errata ID: i690 > >> It seems the patch at least makes the kernel usable on ES1.0. >> > I know but that still is not enough. It's like 80 % WA of the issue > seen on ES1.0. We are not suppose to have many boards with > ES1.0 > Even better if there are not many boards. It seems most of the boards will be with TI. I think we should have the fix in even if it is not 100% fix. What do you say? regards, -roger