ACPI / hotplug / PCI: Eliminate acpiphp_dev_to_bridge()

Since acpiphp_dev_to_bridge() is only called by
acpiphp_check_host_bridge(), move the code from it to that function
directly which reduces the call chain depth and makes the code
slightly easier to follow.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/hotplug/acpiphp_glue.c

@@ -369,20 +369,6 @@ static acpi_status acpiphp_add_context(acpi_handle handle, u32 lvl, void *data,
 	return AE_OK;
 }
 
-static struct acpiphp_bridge *acpiphp_dev_to_bridge(struct acpi_device *adev)
-{
-	struct acpiphp_bridge *bridge = NULL;
-
-	acpi_lock_hp_context();
-	if (adev->hp) {
-		bridge = to_acpiphp_root_context(adev->hp)->root_bridge;
-		if (bridge)
-			get_bridge(bridge);
-	}
-	acpi_unlock_hp_context();
-	return bridge;
-}
-
 static void cleanup_bridge(struct acpiphp_bridge *bridge)
 {
 	struct acpiphp_slot *slot;
@@ -753,9 +739,15 @@ static void acpiphp_sanitize_bus(struct pci_bus *bus)
 
 void acpiphp_check_host_bridge(struct acpi_device *adev)
 {
-	struct acpiphp_bridge *bridge;
+	struct acpiphp_bridge *bridge = NULL;
 
-	bridge = acpiphp_dev_to_bridge(adev);
+	acpi_lock_hp_context();
+	if (adev->hp) {
+		bridge = to_acpiphp_root_context(adev->hp)->root_bridge;
+		if (bridge)
+			get_bridge(bridge);
+	}
+	acpi_unlock_hp_context();
 	if (bridge) {
 		pci_lock_rescan_remove();