From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21354C282D8 for ; Fri, 1 Feb 2019 21:52:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E3BDF2148D for ; Fri, 1 Feb 2019 21:52:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549057978; bh=sZzhCS1uc1j4a6Z8PxLIZVpdbAyG/ZXwiVn3qt4dcts=; h=Date:From:To:Cc:Subject:List-ID:From; b=N5wUiF50vbKSflz1vVgxcwi3u4Af3YFQoLJuPRNitlrnmRHcY28u/4OpfEmIdqS16 zzooo8NFSXIwYLp7n1liiccoafMLq2WqjkT3I7d7cERmLaoPF8rT5Gy3aJ0r4qH+HY Qv88iYP9RbLjJhDzXV6naPaV7ilY5JS3kDJjFrbw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726610AbfBAVw4 (ORCPT ); Fri, 1 Feb 2019 16:52:56 -0500 Received: from mail.kernel.org ([198.145.29.99]:38870 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726183AbfBAVwz (ORCPT ); Fri, 1 Feb 2019 16:52:55 -0500 Received: from localhost (unknown [69.71.4.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 18F8420863; Fri, 1 Feb 2019 21:52:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549057975; bh=sZzhCS1uc1j4a6Z8PxLIZVpdbAyG/ZXwiVn3qt4dcts=; h=Date:From:To:Cc:Subject:From; b=IFI+p38OFcIvaXu1SzzJA2iLsCwTPM2aElPi7Qwpn0D7YdX0lFgsKrEF3bhqKTMre co20sVcEURmVNIpUooiAyCG/pF3wkEzD98MnXtEnQ3lKxJuPXVsdbTpmlwNAJjcEBO d5IgYXjSVRYELCIEMg5tcurbLScaVs5MombTjPRE= Date: Fri, 1 Feb 2019 15:52:49 -0600 From: Bjorn Helgaas To: linux-pci@vger.kernel.org Cc: Robert Smith , Bart Van Assche , Sinan Kaya , linux-kernel@vger.kernel.org Subject: PCI extended tags regression: 3ware 9650SE-2LP RAID controller not working on AMD Ryzen system Message-ID: <20190201215249.GT229773@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org See https://bugzilla.kernel.org/show_bug.cgi?id=202425. Robert bisected a problem with a 3ware 9650SE-2LP controller to 60db3a4d8cc9 ("PCI: Enable PCIe Extended Tags if supported") and verified that reverting it solves the problem. We have found issues in the past where Root Ports don't handle extended tags correctly and have added quirks to avoid use of them: 1b30dfd376e2 ("PCI: Mark Broadcom HT1100 and HT2000 Root Port Extended Tags as broken") 62ce94a7a5a5 ("PCI: Mark Broadcom HT2100 Root Port Extended Tags as broken") I don't know yet what Root Ports Robert has, but maybe we need a similar quirk? I'm pretty sure Root Ports that don't handle extended tags are out of spec, so it would be ideal if we could get the manufacturer to provide an erratum as documentation. Bjorn