x86: revert default reboot method to REBOOT_KBD

Impact: Reverts default reboot method.

Checkin 14d7ca5c575853664d8fe4f225a77b8df1b7de7d changed the default
reboot method to "pci", a.k.a. port CF9.  Unfortunately this has been
shown to cause lockups on at least two systems for which REBOOT_KBD
worked, both Thinkpads with Intel chipsets.  This reverts the default
to REBOOT_KBD, while leaving the option to have "reboot=pci" specified
explicitly or via a DMI match.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index ddc93891cdcd64faf7187b366b5e3426f3f83932..790b09fbadcbfbffb4938b2ff0cf8a710d3362e7 100644 (file)
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -29,7 +29,7 @@ EXPORT_SYMBOL(pm_power_off);
 
 static const struct desc_ptr no_idt = {};
 static int reboot_mode;
-enum reboot_type reboot_type = BOOT_CF9_COND;
+enum reboot_type reboot_type = BOOT_KBD;
 int reboot_force;
 
 #if defined(CONFIG_X86_32) && defined(CONFIG_SMP)