@@ -1999,12 +1999,17 @@ int kvm_irqchip_add_msi_route(KVMRouteChange *c, int vector, PCIDevice *dev)
return -EINVAL;
}
- trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A",
- vector, virq);
+ if (s->irq_routes->nr < s->gsi_count) {
+ trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A",
+ vector, virq);
- kvm_add_routing_entry(s, &kroute);
- kvm_arch_add_msi_route_post(&kroute, vector, dev);
- c->changes++;
+ kvm_add_routing_entry(s, &kroute);
+ kvm_arch_add_msi_route_post(&kroute, vector, dev);
+ c->changes++;
+ } else {
+ kvm_irqchip_release_virq(s, virq);
+ return -ENOSPC;
+ }
return virq;
}