From patchwork Tue Dec 12 12:43:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 10107367 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AA6D4602C2 for ; Tue, 12 Dec 2017 13:31:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9758A29B9E for ; Tue, 12 Dec 2017 13:31:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8C2EC29BB4; Tue, 12 Dec 2017 13:31:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2826F29B9E for ; Tue, 12 Dec 2017 13:31:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753739AbdLLNai (ORCPT ); Tue, 12 Dec 2017 08:30:38 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:33464 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754474AbdLLMzm (ORCPT ); Tue, 12 Dec 2017 07:55:42 -0500 Received: from localhost (LFbn-1-714-204.w86-246.abo.wanadoo.fr [86.246.189.204]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id A202988A; Tue, 12 Dec 2017 12:55:41 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dave Hansen , "Rafael J. Wysocki" , Thomas Gleixner , Bjorn Helgaas , Linux PCI , Ingo Molnar Subject: [PATCH 4.9 023/148] x86/PCI: Make broadcom_postcore_init() check acpi_disabled Date: Tue, 12 Dec 2017 13:43:53 +0100 Message-Id: <20171212124432.158658505@linuxfoundation.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20171212124431.207182779@linuxfoundation.org> References: <20171212124431.207182779@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Rafael J. Wysocki commit ddec3bdee05b06f1dda20ded003c3e10e4184cab upstream. acpi_os_get_root_pointer() may return a valid address even if acpi_disabled is set, but the host bridge information from the ACPI tables is not going to be used in that case and the Broadcom host bridge initialization should not be skipped then, So make broadcom_postcore_init() check acpi_disabled too to avoid this issue. Fixes: 6361d72b04d1 (x86/PCI: read Broadcom CNB20LE host bridge info before PCI scan) Reported-by: Dave Hansen Signed-off-by: Rafael J. Wysocki Signed-off-by: Thomas Gleixner Cc: Bjorn Helgaas Cc: Linux PCI Link: https://lkml.kernel.org/r/3186627.pxZj1QbYNg@aspire.rjw.lan Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- arch/x86/pci/broadcom_bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/pci/broadcom_bus.c +++ b/arch/x86/pci/broadcom_bus.c @@ -97,7 +97,7 @@ static int __init broadcom_postcore_init * We should get host bridge information from ACPI unless the BIOS * doesn't support it. */ - if (acpi_os_get_root_pointer()) + if (!acpi_disabled && acpi_os_get_root_pointer()) return 0; #endif