linux-kernel - [PATCH] [1/50] x86: Make Dell Latitude E6420 use reboot=pci

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Message-Id: <20110728234405.5241B2403FF@tassilo.jf.intel.com>
Date:	Thu, 28 Jul 2011 16:44:05 -0700 (PDT)
From:	Andi Kleen <andi@...stfloor.org>
To:	hpa@...or.com, ak@...ux.intel.com, linux-kernel@...r.kernel.org,
	stable@...nel.org, tim.bird@...sony.com
Subject: [PATCH] [1/50] x86: Make Dell Latitude E6420 use reboot=pci

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: H. Peter Anvin <hpa@...or.com>

[ upstream commit a536877e77f73ea22d12d94a019fedd9671b6acd ]

Yet another variant of the Dell Latitude series which requires
reboot=pci.

>From the E5420 bug report by Daniel J Blueman:

> The E6420 is affected also (same platform, different casing and
> features), which provides an external confirmation of the issue; I can
> submit a patch for that later or include it if you prefer:
> http://linux.koolsolutions.com/2009/08/04/howto-fix-linux-hangfreeze-during-reboots-and-restarts/

Reported-by: Daniel J Blueman <daniel.blueman@...il.com>
Signed-off-by: H. Peter Anvin <hpa@...or.com>
Cc: <stable@...nel.org>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>

Index: linux-2.6.35.y/arch/x86/kernel/reboot.c
===================================================================
--- linux-2.6.35.y.orig/arch/x86/kernel/reboot.c
+++ linux-2.6.35.y/arch/x86/kernel/reboot.c
@@ -485,6 +485,14 @@ static struct dmi_system_id __initdata p
 			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"),
 		},
 	},
+	{	/* Handle problems with rebooting on the Latitude E6420. */
+		.callback = set_pci_reboot,
+		.ident = "Dell Latitude E6420",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"),
+		},
+	},
 	{ }
 };
 
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