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>

1 files changed, 11 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);