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KVM: Clear assigned guest IRQ on release 

When we deassign a guest IRQ, clear the potentially asserted guest line.
There might be no chance for the guest to do this, specifically if we
switch from INTx to MSI mode.

Acked-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Jan Kiszka 2010-11-16 22:30:02 +01:00 committed by Avi Kivity
parent 945ee35e07
commit 0c106b5aaa
1 changed files with 3 additions and 0 deletions
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3
virt/kvm/assigned-dev.c
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@ -141,6 +141,9 @@ static void deassign_guest_irq(struct kvm *kvm,
kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier);
assigned_dev->ack_notifier.gsi = -1;
kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
assigned_dev->guest_irq, 0);
if (assigned_dev->irq_source_id != -1)
kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
assigned_dev->irq_source_id = -1;