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=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 62D73C48BDF for ; Tue, 15 Jun 2021 10:26:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 457A561452 for ; Tue, 15 Jun 2021 10:26:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231618AbhFOK2H (ORCPT ); Tue, 15 Jun 2021 06:28:07 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:23156 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231608AbhFOK2E (ORCPT ); Tue, 15 Jun 2021 06:28:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623752760; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=h2UOdzryF6sn8L4XRhvrh+Vyxn6lZrCVAYeiITI8oa4=; b=PgaG6WQSq9I79t5wA+Vv94ebzAgzsvPZKKltVnLLb9Cat9bAgTWbpqjO8/tWM9CvtioKUT GH29RB6YW7/o/lBvyyb5wsKZYP7HJ2g8RmaW+ylarSkaqCjO2wDdPXDG/Mu27drafj8NzH ycerf+QcEKpknJyTQSwyqzGRcd5oGgY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-559-4HptgHMPNGicKJOuvP3D6g-1; Tue, 15 Jun 2021 06:25:58 -0400 X-MC-Unique: 4HptgHMPNGicKJOuvP3D6g-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4AA791850618; Tue, 15 Jun 2021 10:25:57 +0000 (UTC) Received: from x1.localdomain (ovpn-113-81.ams2.redhat.com [10.36.113.81]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0F5EF5D9CA; Tue, 15 Jun 2021 10:25:55 +0000 (UTC) From: Hans de Goede To: "Rafael J . Wysocki" , Len Brown , Bjorn Helgaas Cc: Hans de Goede , linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org Subject: [RFC 0/1] PCI/ACPI: Make acpi_pci_root_validate_resources() reject IOMEM resources which start at address 0 Date: Tue, 15 Jun 2021 12:25:54 +0200 Message-Id: <20210615102555.6035-1-hdegoede@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Hi All, Here is an attempt to fix an issue which is causing I2C-HID touchpads / touchscreens to not work on various recent Intel CPU using Lenovo Ideapad laptop models. There are quite a few reports about this and I think I've finally figured out what is going on here. See the patch for details. Note this is just a RFC for now, with as purpose to gather some feedback, specifically feedback on if the solution I came up with to just reject all _CSR returned PCI IOMEM regions with a base-address of 0 is acceptable. This is a RFC becase I'm waiting to hear back from the reporters to see if the patch actually fixes things. Regards, Hans Hans de Goede (1): PCI/ACPI: Make acpi_pci_root_validate_resources() reject IOMEM resources which start at address 0 drivers/acpi/pci_root.c | 7 +++++++ 1 file changed, 7 insertions(+) -- 2.31.1