[PATCH] x86: Add reboot quirk for Dell Precision M4600

[Mel Gorman]

ACPI reboot does not work for Dell Precision M4600. Detect this
machine via DMI and force the use of the PCI reboot method.
    
Reported-and-tested-by: Bruno Friedmann <bruno@xxxxxxxxxxx>
Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
---
 arch/x86/kernel/reboot.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 9242436..7ca2ec4 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -443,6 +443,15 @@ static struct dmi_system_id __initdata pci_reboot_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"),
 		},
 	},
+	{	/* Handle problems with rebooting on Dell Precision M4600's */
+		.callback = set_pci_reboot,
+		.ident = "Dell Precision M4600",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Precision M4600"),
+		},
+	},
+
 	{ }
 };
 
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