From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40430 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751644AbdAXH7k (ORCPT ); Tue, 24 Jan 2017 02:59:40 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Martin Burnicki , Bjorn Helgaas Subject: [PATCH 4.9 031/130] x86/PCI: Ignore _CRS on Supermicro X8DTH-i/6/iF/6F Date: Tue, 24 Jan 2017 08:54:31 +0100 Message-Id: <20170124075536.227684470@linuxfoundation.org> In-Reply-To: <20170124075534.905042535@linuxfoundation.org> References: <20170124075534.905042535@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bjorn Helgaas commit 89e9f7bcd8744ea25fcf0ac671b8d72c10d7d790 upstream. Martin reported that the Supermicro X8DTH-i/6/iF/6F advertises incorrect host bridge windows via _CRS: pci_root PNP0A08:00: host bridge window [io 0xf000-0xffff] pci_root PNP0A08:01: host bridge window [io 0xf000-0xffff] Both bridges advertise the 0xf000-0xffff window, which cannot be correct. Work around this by ignoring _CRS on this system. The downside is that we may not assign resources correctly to hot-added PCI devices (if they are possible on this system). Link: https://bugzilla.kernel.org/show_bug.cgi?id=42606 Reported-by: Martin Burnicki Signed-off-by: Bjorn Helgaas Signed-off-by: Greg Kroah-Hartman --- arch/x86/pci/acpi.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -114,6 +114,16 @@ static const struct dmi_system_id pci_cr DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"), }, }, + /* https://bugzilla.kernel.org/show_bug.cgi?id=42606 */ + { + .callback = set_nouse_crs, + .ident = "Supermicro X8DTH", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"), + DMI_MATCH(DMI_PRODUCT_NAME, "X8DTH-i/6/iF/6F"), + DMI_MATCH(DMI_BIOS_VERSION, "2.0a"), + }, + }, /* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */ {