KVM: cleanup the failure path of KVM_CREATE_IRQCHIP ioctrl

If we fail to init ioapic device or the fail to setup the default irq
routing, the device register by kvm_create_pic() and kvm_ioapic_init()
remain unregister. This patch fixed to do this.

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

2 files changed, 12 insertions, 0 deletions

diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index f3d06934ae6d..3db15a807f80 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -401,6 +401,17 @@ int kvm_ioapic_init(struct kvm *kvm)
         return ret;
 }
 
+void kvm_ioapic_destroy(struct kvm *kvm)
+{
+        struct kvm_ioapic *ioapic = kvm->arch.vioapic;
+
+        if (ioapic) {
+                kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &ioapic->dev);
+                kvm->arch.vioapic = NULL;
+                kfree(ioapic);
+        }
+}
+
 int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state)
 {
         struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);
diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
index a505ce9054f3..8a751b78a430 100644
--- a/virt/kvm/ioapic.h
+++ b/virt/kvm/ioapic.h
@@ -72,6 +72,7 @@ int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode);
 int kvm_ioapic_init(struct kvm *kvm);
+void kvm_ioapic_destroy(struct kvm *kvm);
 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
 void kvm_ioapic_reset(struct kvm_ioapic *ioapic);
 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,