diff options
-rw-r--r-- | arch/arm/xen/enlighten.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index dad4ffb0934c..fc7ea529f462 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -86,6 +86,14 @@ static void xen_percpu_init(void) int err; int cpu = get_cpu(); + /* + * VCPUOP_register_vcpu_info cannot be called twice for the same + * vcpu, so if vcpu_info is already registered, just get out. This + * can happen with cpu-hotplug. + */ + if (per_cpu(xen_vcpu, cpu) != NULL) + goto after_register_vcpu_info; + pr_info("Xen: initializing cpu%d\n", cpu); vcpup = per_cpu_ptr(xen_vcpu_info, cpu); @@ -96,6 +104,7 @@ static void xen_percpu_init(void) BUG_ON(err); per_cpu(xen_vcpu, cpu) = vcpup; +after_register_vcpu_info: enable_percpu_irq(xen_events_irq, 0); put_cpu(); } @@ -124,6 +133,9 @@ static int xen_cpu_notification(struct notifier_block *self, case CPU_STARTING: xen_percpu_init(); break; + case CPU_DYING: + disable_percpu_irq(xen_events_irq); + break; default: break; } |