Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030251AbXADV7m (ORCPT ); Thu, 4 Jan 2007 16:59:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030249AbXADV7m (ORCPT ); Thu, 4 Jan 2007 16:59:42 -0500 Received: from sj-iport-5.cisco.com ([171.68.10.87]:47324 "EHLO sj-iport-5.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030190AbXADV7l (ORCPT ); Thu, 4 Jan 2007 16:59:41 -0500 To: Petr Vandrovec Cc: jeff@garzik.org, linux-kernel@vger.kernel.org, akpm@osdl.org Subject: Re: [PATCH] Unbreak MSI on ATI devices X-Message-Flag: Warning: May contain useful information References: <20061221075540.GA21152@vana.vc.cvut.cz> From: Roland Dreier Date: Thu, 04 Jan 2007 13:59:37 -0800 In-Reply-To: <20061221075540.GA21152@vana.vc.cvut.cz> (Petr Vandrovec's message of "Thu, 21 Dec 2006 08:55:40 +0100") Message-ID: User-Agent: Gnus/5.1007 (Gnus v5.10.7) XEmacs/21.4.19 (linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 04 Jan 2007 21:59:39.0821 (UTC) FILETIME=[A1C71DD0:01C7304B] Authentication-Results: sj-dkim-7; header.From=rdreier@cisco.com; dkim=pass ( sig from cisco.com/sjdkim7002 verified; ); Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 896 Lines: 18 > So my question is - what is real reason for disabling INTX when in MSI mode? > According to PCI spec it should not be needed, and it hurts at least chips > listed below: > > 00:13.0 0c03: 1002:4374 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller > 00:13.1 0c03: 1002:4375 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller > 00:13.2 0c03: 1002:4373 USB Controller: ATI Technologies Inc IXP SB400 USB2 Host Controller heh... I'm not gloating or anything... but I am glad that some ASIC designer was careless enough to prove me right when I said going beyond what the PCI spec requires is dangerous. - R. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/