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KVM: ignore msi request if !level 

Irqfd sets level for interrupt to 1 and then to 0.
For MSI, check level so that a single message is sent.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2009-07-05 21:27:58 +03:00 committed by Avi Kivity
parent f7c6d14003
commit 07fb8bb29f
1 changed files with 3 additions and 1 deletions
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4
virt/kvm/irq_comm.c
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@ -139,7 +139,9 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
else
clear_bit(irq_source_id, irq_state);
sig_level = !!(*irq_state);
} else /* Deal with MSI/MSI-X */
} else if (!level)
return ret;
else /* Deal with MSI/MSI-X */
sig_level = 1;
/* Not possible to detect if the guest uses the PIC or the