linux-kernel - [PATCH] Add quirk for ACPI reboots on Intel DP55KG boards.

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Message-Id: <1255645796-29944-1-git-send-email-bdonlan@gmail.com>
Date:	Thu, 15 Oct 2009 18:29:56 -0400
From:	Bryan Donlan <bdonlan@...il.com>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
Cc:	bruce.w.allan@...el.com, linux-kernel@...r.kernel.org,
	Bryan Donlan <bdonlan@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Subject: [PATCH] Add quirk for ACPI reboots on Intel DP55KG boards.

Keyboard-based and BIOS-based reboots don't work on Intel DP55KG boards;
use ACPI reboots instead.

Reported-By: Justin Piszcz <jpiszcz@...idpixels.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: x86@...nel.org
Signed-off-by: Bryan Donlan <bdonlan@...il.com>
---
 arch/x86/kernel/reboot.c |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

Justin, could you give this patch a try? It should make the reboot=acpi
workaround automatic.
(x86 maintainers CC'd)

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index a1a3cdd..67bfcef 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -134,6 +134,21 @@ static int __init set_bios_reboot(const struct dmi_system_id *d)
 	return 0;
 }
 
+/*
+ * Some machines require the "reboot=a" commandline option.
+ * This quirk makes that automatic.
+ */
+static int __init set_acpi_reboot(const struct dmi_system_id *d)
+{
+	if (reboot_type != BOOT_ACPI) {
+		reboot_type = BOOT_ACPI;
+		printk(KERN_INFO "%s series board detected. Selecting ACPI "
+				"method for reboots.\n", d->ident);
+	}
+	return 0;
+}
+
+
 static struct dmi_system_id __initdata reboot_dmi_table[] = {
 	{	/* Handle problems with rebooting on Dell E520's */
 		.callback = set_bios_reboot,
@@ -259,6 +274,14 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "SBC-FITPC2"),
 		},
 	},
+	{	/* Handle problems with rebooting on Intel DP55KG */
+		.callback = set_acpi_reboot,
+		.ident = "Intel DP55KG",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "DP55KG"),
+		},
+	},
 	{ }
 };
 
-- 
1.6.3.3

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