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 B837CC28D13 for ; Mon, 22 Aug 2022 03:43:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231851AbiHVDny (ORCPT ); Sun, 21 Aug 2022 23:43:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229961AbiHVDnw (ORCPT ); Sun, 21 Aug 2022 23:43:52 -0400 Received: from mail-pl1-f180.google.com (mail-pl1-f180.google.com [209.85.214.180]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 933B9DF60 for ; Sun, 21 Aug 2022 20:43:49 -0700 (PDT) Received: by mail-pl1-f180.google.com with SMTP id c2so8801862plo.3 for ; Sun, 21 Aug 2022 20:43:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc; bh=HFVw3jVUKJbSkeKcqcD2AtVfVExg7SHFd1qgEtX/JNg=; b=Q92aITiEhGaedkYzGgvXZO7wRd9JsukUpQVdHCMM8OZFQ+aIt2i3HOqj27upb7+KDK ezj5Xsl+qWPNsBJwCLRlOnH70gci5JtwSI9T5ibqslK3WCQ90GyqWZncukOchgoxgjMs eXt6Bx7vCQPtKdWdH7w0Kzqn8n43/r4pg6GfrTCwb3T6KzJ/koV02Mw0FpdvKWTDSZNN n7ODWRQyjH1ccWuT/3KTehMmtDtnmw6nQywXqwDlbVN4to2LBkhxi1pH6c0FM0MsDK+n QO7Nm7wewTHXxwBIBJL+s+J/48GC8ynZZns9FK1JWyqV6JQck4p18sN0eZb0yNc/1nxL oLHg== X-Gm-Message-State: ACgBeo38CyXb69OHNvOA5HCHLISRnJdCpLJ/qZCUcIG+wMfSnwwyQvXV 60D0cEquQ0H7wkOP8tKuNkM= X-Google-Smtp-Source: AA6agR7WyLeUKwY9WxRSa2+mGLewxHJd0Ynj3gJEQDDfZ0+D5kLj3MggBv+mKTGBvduq/9kFdapcZg== X-Received: by 2002:a17:90b:4d89:b0:1fb:1cf5:e23d with SMTP id oj9-20020a17090b4d8900b001fb1cf5e23dmr5638939pjb.133.1661139829047; Sun, 21 Aug 2022 20:43:49 -0700 (PDT) Received: from rocinante (fpd11144dd.ap.nuro.jp. [209.17.68.221]) by smtp.gmail.com with ESMTPSA id i5-20020a655b85000000b0042a5e8486a1sm3799909pgr.42.2022.08.21.20.43.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Aug 2022 20:43:48 -0700 (PDT) Date: Mon, 22 Aug 2022 12:43:44 +0900 From: Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= To: Mika Westerberg Cc: Bjorn Helgaas , Russell Currey , oohall@gmail.com, Paul Menzel , Lukas Wunner , linux-pci@vger.kernel.org, Sasha Levin Subject: Re: [PATCH] PCI/DPC: Quirk PIO log size for certain Intel PCIe root ports Message-ID: References: <20220816102042.69125-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20220816102042.69125-1-mika.westerberg@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org [Adding Sasha for visibility] Hi Mika, > There is a BIOS bug on Intel Tiger Lake and Alder Lake systems that > accidentally clears the root port PIO log size even though it should be 4. > Fix the affected root ports by forcing the log size to be 4 if it is set > to 0. The BIOS for the next generation CPUs should have this fixed. Thank you for the fix! > Link: https://bugzilla.kernel.org/show_bug.cgi?id=209943 I've added Sasha, as there is probably a lot of the 11th and 12th generation of Intel hardware out there that might warrant a backport to stable kernels. Krzysztof