linux-kernel - [PATCH] [98/99] x86: Make Dell Latitude E5420 use reboot=pci

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Date:	Wed, 27 Jul 2011 14:49:38 -0700 (PDT)
From:	Andi Kleen <andi@...stfloor.org>
To:	daniel.blueman@...il.com, ak@...ux.intel.com, hpa@...or.com,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	tim.bird@...sony.com
Subject: [PATCH] [98/99] x86: Make Dell Latitude E5420 use reboot=pci

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

------------------
From: Daniel J Blueman <daniel.blueman@...il.com>

[ upstream commit b7798d28ec15d20fd34b70fa57eb13f0cf6d1ecd ]

Rebooting on the Dell E5420 often hangs with the keyboard or ACPI
methods, but is reliable via the PCI method.

[ hpa: this was deferred because we believed for a long time that the
  recent reshuffling of the boot priorities in commit
  660e34cebf0a11d54f2d5dd8838607452355f321 fixed this platform.
  Unfortunately that turned out to be incorrect. ]

Signed-off-by: Daniel J Blueman <daniel.blueman@...il.com>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
Link: http://lkml.kernel.org/r/1305248699-2347-1-git-send-email-daniel.blueman@gmail.com
Signed-off-by: H. Peter Anvin <hpa@...or.com>
Cc: <stable@...nel.org>

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
@@ -477,6 +477,14 @@ static struct dmi_system_id __initdata p
 			DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"),
 		},
 	},
+	{	/* Handle problems with rebooting on the Latitude E5420. */
+		.callback = set_pci_reboot,
+		.ident = "Dell Latitude E5420",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"),
+		},
+	},
 	{ }
 };

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