diff options
Diffstat (limited to 'arch/i386/kernel')
| -rw-r--r-- | arch/i386/kernel/apic.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c index 7c724ffa08b..496a2c9909f 100644 --- a/arch/i386/kernel/apic.c +++ b/arch/i386/kernel/apic.c @@ -559,14 +559,20 @@ void __devinit setup_local_APIC(void) * If Linux enabled the LAPIC against the BIOS default * disable it down before re-entering the BIOS on shutdown. * Otherwise the BIOS may get confused and not power-off. + * Additionally clear all LVT entries before disable_local_APIC + * for the case where Linux didn't enable the LAPIC. */ void lapic_shutdown(void) { - if (!cpu_has_apic || !enabled_via_apicbase) + if (!cpu_has_apic) return; local_irq_disable(); - disable_local_APIC(); + clear_local_APIC(); + + if (enabled_via_apicbase) + disable_local_APIC(); + local_irq_enable(); } |