kvm: irqchip: fix memory leak

We were taking the exit path after checking ue->flags and return value
of setup_routing_entry(), but 'e' was not freed incase of a failure.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/virt/kvm/irqchip.c b/virt/kvm/irqchip.c
index 21c1424..d7ea8e2 100644
--- a/virt/kvm/irqchip.c
+++ b/virt/kvm/irqchip.c
@@ -213,11 +213,15 @@
 			goto out;
 
 		r = -EINVAL;
-		if (ue->flags)
+		if (ue->flags) {
+			kfree(e);
 			goto out;
+		}
 		r = setup_routing_entry(new, e, ue);
-		if (r)
+		if (r) {
+			kfree(e);
 			goto out;
+		}
 		++ue;
 	}