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KVM: do not register i8254 PIO regions until we are initialized 

We currently publish the i8254 resources to the pio_bus before the devices
are fully initialized.  Since we hold the pit_lock, its probably not
a real issue.  But lets clean this up anyway.

Reported-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gregory Haskins 2009-06-01 12:54:56 -04:00 committed by Avi Kivity
parent d76685c4a0
commit 6b66ac1ae3
1 changed files with 8 additions and 9 deletions
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17
arch/x86/kvm/i8254.c
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@ -604,15 +604,6 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
mutex_lock(&pit->pit_state.lock);
spin_lock_init(&pit->pit_state.inject_lock);
/* Initialize PIO device */
kvm_iodevice_init(&pit->dev, &pit_dev_ops);
kvm_io_bus_register_dev(&kvm->pio_bus, &pit->dev);
if (flags & KVM_PIT_SPEAKER_DUMMY) {
kvm_iodevice_init(&pit->speaker_dev, &speaker_dev_ops);
kvm_io_bus_register_dev(&kvm->pio_bus, &pit->speaker_dev);
}
kvm->arch.vpit = pit;
pit->kvm = kvm;
@ -631,6 +622,14 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
pit->mask_notifier.func = pit_mask_notifer;
kvm_register_irq_mask_notifier(kvm, 0, &pit->mask_notifier);
kvm_iodevice_init(&pit->dev, &pit_dev_ops);
kvm_io_bus_register_dev(&kvm->pio_bus, &pit->dev);
if (flags & KVM_PIT_SPEAKER_DUMMY) {
kvm_iodevice_init(&pit->speaker_dev, &speaker_dev_ops);
kvm_io_bus_register_dev(&kvm->pio_bus, &pit->speaker_dev);
}
return pit;
}