[POWERPC] Simplify error logic in u3msi_setup_msi_irqs()

u3msi_setup_msi_irqs() doesn't need to call teardown() itself,
the generic code will do this for us as long as we return a non
zero value.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/sysdev/mpic_u3msi.c

@@ -125,7 +125,6 @@ static void u3msi_compose_msi_msg(struct pci_dev *pdev, int virq,
 static int u3msi_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
 {
 	irq_hw_number_t hwirq;
-	int rc;
 	unsigned int virq;
 	struct msi_desc *entry;
 	struct msi_msg msg;
@@ -133,17 +132,15 @@ static int u3msi_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
 	list_for_each_entry(entry, &pdev->msi_list, list) {
 		hwirq = mpic_msi_alloc_hwirqs(msi_mpic, 1);
 		if (hwirq < 0) {
-			rc = hwirq;
 			pr_debug("u3msi: failed allocating hwirq\n");
-			goto out_free;
+			return hwirq;
 		}
 
 		virq = irq_create_mapping(msi_mpic->irqhost, hwirq);
 		if (virq == NO_IRQ) {
 			pr_debug("u3msi: failed mapping hwirq 0x%lx\n", hwirq);
 			mpic_msi_free_hwirqs(msi_mpic, hwirq, 1);
-			rc = -ENOSPC;
-			goto out_free;
+			return -ENOSPC;
 		}
 
 		set_irq_msi(virq, entry);
@@ -157,10 +154,6 @@ static int u3msi_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
 	}
 
 	return 0;
-
- out_free:
-	u3msi_teardown_msi_irqs(pdev);
-	return rc;
 }
 
 int mpic_u3msi_init(struct mpic *mpic)