diff options
Diffstat (limited to 'arch/x86/kernel/apic_32.c')
| -rw-r--r-- | arch/x86/kernel/apic_32.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c index cbcf72cde956..20d4dbc42e6e 100644 --- a/arch/x86/kernel/apic_32.c +++ b/arch/x86/kernel/apic_32.c @@ -470,6 +470,19 @@ void __init setup_boot_APIC_clock(void) local_apic_timer_verify_ok = 1; + /* + * Do a sanity check on the APIC calibration result + */ + if (calibration_result < (1000000 / HZ)) { + local_irq_enable(); + printk(KERN_WARNING + "APIC frequency too slow, disabling apic timer\n"); + /* No broadcast on UP ! */ + if (num_possible_cpus() > 1) + setup_APIC_timer(); + return; + } + /* We trust the pm timer based calibration */ if (!pm_referenced) { apic_printk(APIC_VERBOSE, "... verify APIC timer\n"); |