From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Hancock Subject: Re: [PATCH 2.6.32] MCP5x conditional MSI support for sata_nv Date: Wed, 05 Aug 2009 17:45:51 -0600 Message-ID: <4A7A19AF.9040400@gmail.com> References: <20090804233234.7251110075@gold.linx.net> <20090804193508.4bb868f3@fido2.homeip.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-gx0-f213.google.com ([209.85.217.213]:43718 "EHLO mail-gx0-f213.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751267AbZHEXpy (ORCPT ); Wed, 5 Aug 2009 19:45:54 -0400 Received: by gxk9 with SMTP id 9so628602gxk.13 for ; Wed, 05 Aug 2009 16:45:54 -0700 (PDT) In-Reply-To: <20090804193508.4bb868f3@fido2.homeip.net> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Philip Langdale Cc: Tony Vroon , Jeff Garzik , linux-ide@vger.kernel.org On 08/04/2009 08:35 PM, Philip Langdale wrote: > On Wed, 5 Aug 2009 00:32:34 +0100 (BST) > Tony Vroon wrote: > >> The nVidia MCP55 controller quite happily supports MSI. >> This adds an option to use it. It is disabled by default and >> will only be honoured on MCP5x series controllers. >> This was suggested in 2007 back when the driver was less mature, >> perhaps now is a better time for it. > > I don't use an MCP55 motherboard anymore but I ran with MSI on for > multiple years to no ill effect. However, in this thread where I > reported my success, another person reported failure with MCP51. > > http://www.nvnews.net/vbulletin/showthread.php?t=101144&highlight=sata_nv+msi > > Assuming that's true, you can't use the 'MCP5x' test as that will > cover MCP51 as well. I'd take that with a bit of a grain of salt as there have been a lot of HT MSI fixups included since those posts (2007). Some motherboards didn't enable HT MSI mapping capabilities by default, which would prevent MSI from working.