1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 137e54817102..472653c15a2a 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -672,6 +672,8 @@ void kvm_free_pit(struct kvm *kvm)
         if (kvm->arch.vpit) {
                 kvm_unregister_irq_mask_notifier(kvm, 0,
                                                &kvm->arch.vpit->mask_notifier);
+                kvm_unregister_irq_ack_notifier(kvm,
+                                &kvm->arch.vpit->pit_state.irq_ack_notifier);
                 mutex_lock(&kvm->arch.vpit->pit_state.lock);
                 timer = &kvm->arch.vpit->pit_state.pit_timer.timer;
                 hrtimer_cancel(timer);