KVM: kvm->arch.vioapic should be NULL if kvm_ioapic_init() failure

kvm->arch.vioapic should be NULL in case of kvm_ioapic_init() failure
due to cannot register io dev.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index a2edfd177faf..f3d06934ae6d 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -393,8 +393,10 @@ int kvm_ioapic_init(struct kvm *kvm)
         mutex_lock(&kvm->slots_lock);
         ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, &ioapic->dev);
         mutex_unlock(&kvm->slots_lock);
-        if (ret < 0)
+        if (ret < 0) {
+                kvm->arch.vioapic = NULL;
                 kfree(ioapic);
+        }
 
         return ret;
 }