Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965080AbbDQNgo (ORCPT ); Fri, 17 Apr 2015 09:36:44 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:34053 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933549AbbDQNgi (ORCPT ); Fri, 17 Apr 2015 09:36:38 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Stefan Lippers-Hollmann , Matt Fleming , Ingo Molnar Subject: [PATCH 3.19 065/101] x86/reboot: Add ASRock Q1900DC-ITX mainboard reboot quirk Date: Fri, 17 Apr 2015 15:28:53 +0200 Message-Id: <20150417132517.205183516@linuxfoundation.org> X-Mailer: git-send-email 2.3.5 In-Reply-To: <20150417132514.379828774@linuxfoundation.org> References: <20150417132514.379828774@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2421 Lines: 66 3.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stefan Lippers-Hollmann commit 80313b3078fcd2ca51970880d90757f05879a193 upstream. The ASRock Q1900DC-ITX mainboard (Baytrail-D) hangs randomly in both BIOS and UEFI mode while rebooting unless reboot=pci is used. Add a quirk to reboot via the pci method. The problem is very intermittent and hard to debug, it might succeed rebooting just fine 40 times in a row - but fails half a dozen times the next day. It seems to be slightly less common in BIOS CSM mode than native UEFI (with the CSM disabled), but it does happen in either mode. Since I've started testing this patch in late january, rebooting has been 100% reliable. Most of the time it already hangs during POST, but occasionally it might even make it through the bootloader and the kernel might even start booting, but then hangs before the mode switch. The same symptoms occur with grub-efi, gummiboot and grub-pc, just as well as (at least) kernel 3.16-3.19 and 4.0-rc6 (I haven't tried older kernels than 3.16). Upgrading to the most current mainboard firmware of the ASRock Q1900DC-ITX, version 1.20, does not improve the situation. ( Searching the web seems to suggest that other Bay Trail-D mainboards might be affected as well. ) -- Signed-off-by: Stefan Lippers-Hollmann Cc: Matt Fleming Link: http://lkml.kernel.org/r/20150330224427.0fb58e42@mir Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/reboot.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -183,6 +183,16 @@ static struct dmi_system_id __initdata r }, }, + /* ASRock */ + { /* Handle problems with rebooting on ASRock Q1900DC-ITX */ + .callback = set_pci_reboot, + .ident = "ASRock Q1900DC-ITX", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "ASRock"), + DMI_MATCH(DMI_BOARD_NAME, "Q1900DC-ITX"), + }, + }, + /* ASUS */ { /* Handle problems with rebooting on ASUS P4S800 */ .callback = set_bios_reboot, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/