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 <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
mrcsosa · Sep 10, 2009 · 07fb8bb · 07fb8bb
1 parent f7c6d14
commit 07fb8bb
Showing 1 changed file with 3 additions and 1 deletion.
diff --git 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