linux-kernel - [10/18] x86: ASUS P4S800 reboot=bios quirk

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Message-Id: <20091217004708.398272676@mini.kroah.org>
Date:	Wed, 16 Dec 2009 16:46:01 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Leann Ogasawara <leann.ogasawara@...onical.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [10/18] x86: ASUS P4S800 reboot=bios quirk

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Leann Ogasawara <leann.ogasawara@...onical.com>

commit 4832ddda2ec4df96ea1eed334ae2dbd65fc1f541 upstream.

Bug reporter noted their system with an ASUS P4S800 motherboard would
hang when rebooting unless reboot=b was specified.  Their dmidecode
didn't contain descriptive System Information for Manufacturer or
Product Name, so I used their Base Board Information to create a
reboot quirk patch.  The bug reporter confirmed this patch resolves
the reboot hang.

Handle 0x0001, DMI type 1, 25 bytes
System Information
       Manufacturer: System Manufacturer
       Product Name: System Name
       Version: System Version
       Serial Number: SYS-1234567890
       UUID: E0BFCD8B-7948-D911-A953-E486B4EEB67F
       Wake-up Type: Power Switch

Handle 0x0002, DMI type 2, 8 bytes
Base Board Information
     Manufacturer: ASUSTeK Computer INC.
     Product Name: P4S800
     Version: REV 1.xx
     Serial Number: xxxxxxxxxxx

BugLink: http://bugs.launchpad.net/bugs/366682

ASUS P4S800 will hang when rebooting unless reboot=b is specified.
Add a quirk to reboot through the bios.

Signed-off-by: Leann Ogasawara <leann.ogasawara@...onical.com>
LKML-Reference: <1259972107.4629.275.camel@...ko>
Signed-off-by: H. Peter Anvin <hpa@...or.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/x86/kernel/reboot.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -219,6 +219,14 @@ static struct dmi_system_id __initdata r
 			DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"),
 		},
 	},
+	{       /* Handle problems with rebooting on ASUS P4S800 */
+		.callback = set_bios_reboot,
+		.ident = "ASUS P4S800",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+			DMI_MATCH(DMI_BOARD_NAME, "P4S800"),
+		},
+	},
 	{ }
 };

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