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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DEF2AC6FA82 for ; Mon, 26 Sep 2022 21:17:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231374AbiIZVRc (ORCPT ); Mon, 26 Sep 2022 17:17:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230032AbiIZVRb (ORCPT ); Mon, 26 Sep 2022 17:17:31 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC6A2796A7; Mon, 26 Sep 2022 14:17:27 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 5D2196144B; Mon, 26 Sep 2022 21:17:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 76E15C433D7; Mon, 26 Sep 2022 21:17:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1664227046; bh=6GSn94Blq3J790kWs2lNqt3NgwBFtoPMQx4tbDun8ZE=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=MCEmjgVe9iLcMmSWH6gZxsW71KKhS5j6Z112TuWs/so7f8Sqt0P5WJXl3SDFzUcYr PB7fSm717V70sS0jDVtBuBcwvmxrV5ByTbaBtVM8UYcw5inJ6Aayn6oFjK7YmToK1s 0TnqJsVAiz97k13QORTEENy+nJKd8FhNqgqcAsDxvxrCWm/eZEixH+xGI0R9R814ru P0ReoT5JyjgkF6rL7jEez4uR3O6w82WyA50AMxRmdTBuFjGzqJFJ+IkuxImU98vaVQ UpjNpFYxFI8ZmQCk6QO+gzYD09/w4loNIcqennjUYPFwC7wwkHUUdwJ42H59YutdnD nyjMsCzrdxxrA== Date: Mon, 26 Sep 2022 16:17:24 -0500 From: Bjorn Helgaas To: Grzegorz Halat Cc: stefan.buehler@tik.uni-stuttgart.de, sean.v.kelley@linux.intel.com, bhelgaas@google.com, bp@alien8.de, corbet@lwn.net, gregkh@linuxfoundation.org, kar.hin.ong@ni.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, mingo@redhat.com, sassmann@kpanic.de, tglx@linutronix.de, x86@kernel.org Subject: Re: boot interrupt quirk (also in 4.19.y) breaks serial ports (was: [PATCH v2 0/2] pci: Add boot interrupt quirk mechanism for Xeon chipsets) Message-ID: <20220926211724.GA1625628@bhelgaas> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20220923192030.162412-1-ghalat@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Fri, Sep 23, 2022 at 09:20:30PM +0200, Grzegorz Halat wrote: > On Wed, Sep 16 2020 at 12:12, Stefan Bühler wrote: > > this quirk breaks our serial ports PCIe card (i.e. we don't see any > > output from the connected devices; no idea whether anything we send > > reaches them): > > I have the same problem, also with a PCI serial adapter from Oxford > Semiconductor. I've bisected the kernel and it was introduced in > b88bf6c3b6ff. When the system is booted with "pci=noioapicquirk" > then the PCI card works fine. The CPU is Intel Xeon E5-2680 v3 @ > 2.50GHz. > > Sean, do you have any news about this issue? I think Sean has moved on and isn't available to work this issue. To help whoever *can* work on it, would you mind attaching the complete dmesg log and "sudo lspci -vv" output for your system? Then we can potentially tweak the quirk to not break your system. Bjorn