From 07fb8bb29f5269f30afa6f1b3d941406677f6ad2 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Sun, 5 Jul 2009 21:27:58 +0300 Subject: 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 Signed-off-by: Avi Kivity --- virt/kvm/irq_comm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'virt/kvm') diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 56e696104d43..a9d7fd1f1d6a 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -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 -- cgit v1.2.2