KVM: IRQ ACK notifier should be used with in-kernel irqchip

Also remove unnecessary parameter of unregister irq ack notifier.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 55ad76ee2d09..9fbbdea3d1d5 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -58,12 +58,16 @@ void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi)
 void kvm_register_irq_ack_notifier(struct kvm *kvm,
                                    struct kvm_irq_ack_notifier *kian)
 {
+        /* Must be called with in-kernel IRQ chip, otherwise it's nonsense */
+        ASSERT(irqchip_in_kernel(kvm));
+        ASSERT(kian);
         hlist_add_head(&kian->link, &kvm->arch.irq_ack_notifier_list);
 }
 
-void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
-                                     struct kvm_irq_ack_notifier *kian)
+void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian)
 {
+        if (!kian)
+                return;
         hlist_del(&kian->link);
 }