diff options
Diffstat (limited to 'arch/x86/kernel/genx2apic_cluster.c')
| -rw-r--r-- | arch/x86/kernel/genx2apic_cluster.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/x86/kernel/genx2apic_cluster.c b/arch/x86/kernel/genx2apic_cluster.c index c7557e05184..62f9fccf01d 100644 --- a/arch/x86/kernel/genx2apic_cluster.c +++ b/arch/x86/kernel/genx2apic_cluster.c @@ -111,21 +111,21 @@ static int x2apic_apic_id_registered(void) static unsigned int x2apic_cpu_mask_to_apicid(const struct cpumask *cpumask) { - int cpu; - /* * We're using fixed IRQ delivery, can only return one logical APIC ID. * May as well be the first. */ - cpu = cpumask_first(cpumask); + int cpu = cpumask_first(cpumask); + if ((unsigned)cpu < nr_cpu_ids) return per_cpu(x86_cpu_to_logical_apicid, cpu); else return BAD_APICID; } -static unsigned int x2apic_cpu_mask_to_apicid_and(const struct cpumask *cpumask, - const struct cpumask *andmask) +static unsigned int +x2apic_cpu_mask_to_apicid_and(const struct cpumask *cpumask, + const struct cpumask *andmask) { int cpu; @@ -133,11 +133,14 @@ static unsigned int x2apic_cpu_mask_to_apicid_and(const struct cpumask *cpumask, * We're using fixed IRQ delivery, can only return one logical APIC ID. * May as well be the first. */ - for_each_cpu_and(cpu, cpumask, andmask) + for_each_cpu_and(cpu, cpumask, andmask) { if (cpumask_test_cpu(cpu, cpu_online_mask)) break; + } + if (cpu < nr_cpu_ids) return per_cpu(x86_cpu_to_logical_apicid, cpu); + return BAD_APICID; } |