KVM: do not call hardware_disable() on CPU_UP_CANCELED

When CPU_UP_CANCELED, hardware_enable() has not been called at the CPU
which is going up because raw_notifier_call_chain(CPU_ONLINE)
has not been called for this cpu.

Drop the handling for CPU_UP_CANCELED.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 4901ec5..6dc9404 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1931,11 +1931,6 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
                       cpu);
                hardware_disable(NULL);
                break;
-       case CPU_UP_CANCELED:
-               printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
-                      cpu);
-               smp_call_function_single(cpu, hardware_disable, NULL, 1);
-               break;
        case CPU_ONLINE:
                printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
                       cpu);