ACPI: simplify acpi_pci_irq_del_prt() API

There is no need to pass a segment/bus tuple to this API, as the callsite
always has a struct pci_bus. We can derive segment/bus from the
struct pci_bus, so let's take this opportunit to simplify the API and
make life easier for the callers.
Signed-off-by: Alex Chiang <achiang@hp.com>
Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/pci_bind.c

@@ -113,8 +113,7 @@ static int acpi_pci_unbind(struct acpi_device *device)
 		return 0;
 
 	if (dev->subordinate)
-		acpi_pci_irq_del_prt(pci_domain_nr(dev->bus),
-				     dev->subordinate->number);
+		acpi_pci_irq_del_prt(dev->subordinate);
 
 	pci_dev_put(dev);
 	return 0;

drivers/acpi/pci_irq.c

@@ -280,16 +280,17 @@ int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
 	return 0;
 }
 
-void acpi_pci_irq_del_prt(int segment, int bus)
+void acpi_pci_irq_del_prt(struct pci_bus *bus)
 {
 	struct acpi_prt_entry *entry, *tmp;
 
 	printk(KERN_DEBUG
 	       "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n",
-	       segment, bus);
+	       pci_domain_nr(bus), bus->number);
 	spin_lock(&acpi_prt_lock);
 	list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) {
-		if (segment == entry->id.segment && bus == entry->id.bus) {
+		if (pci_domain_nr(bus) == entry->id.segment
+			&& bus->number == entry->id.bus) {
 			list_del(&entry->list);
 			kfree(entry);
 		}

include/acpi/acpi_drivers.h

@@ -92,7 +92,7 @@ int acpi_pci_link_free_irq(acpi_handle handle);
 /* ACPI PCI Interrupt Routing (pci_irq.c) */
 
 int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus);
-void acpi_pci_irq_del_prt(int segment, int bus);
+void acpi_pci_irq_del_prt(struct pci_bus *bus);
 
 /* ACPI PCI Device Binding (pci_bind.c) */