ACPI / hotplug / PCI: Rework namespace scanning and trimming routines

The acpiphp_bus_trim() and acpiphp_bus_add() functions need not
return error codes that are never checked, so redefine them and
simplify them a bit.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>

1 files changed, 13 insertions, 39 deletions

diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 7ac315afa430..b136eee7a93b 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -540,53 +540,27 @@ static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
         return max;
 }
 
-
 /**
- * acpiphp_bus_add - add a new bus to acpi subsystem
- * @func: acpiphp_func of the bridge
+ * acpiphp_bus_trim - Trim device objects in an ACPI namespace subtree.
+ * @handle: ACPI device object handle to start from.
  */
-static int acpiphp_bus_add(struct acpiphp_func *func)
+static void acpiphp_bus_trim(acpi_handle handle)
 {
-        acpi_handle handle = func_to_handle(func);
-        struct acpi_device *device;
-        int ret_val;
-
-        if (!acpi_bus_get_device(handle, &device)) {
-                dbg("bus exists... trim\n");
-                /* this shouldn't be in here, so remove
-                 * the bus then re-add it...
-                 */
-                acpi_bus_trim(device);
-        }
+        struct acpi_device *adev = NULL;
 
-        ret_val = acpi_bus_scan(handle);
-        if (!ret_val)
-                ret_val = acpi_bus_get_device(handle, &device);
-
-        if (ret_val)
-                dbg("error adding bus, %x\n", -ret_val);
-
-        return ret_val;
+        acpi_bus_get_device(handle, &adev);
+        if (adev)
+                acpi_bus_trim(adev);
 }
 
-
 /**
- * acpiphp_bus_trim - trim a bus from acpi subsystem
- * @handle: handle to acpi namespace
+ * acpiphp_bus_add - Scan ACPI namespace subtree.
+ * @handle: ACPI object handle to start the scan from.
  */
-static int acpiphp_bus_trim(acpi_handle handle)
+static void acpiphp_bus_add(acpi_handle handle)
 {
-        struct acpi_device *device;
-        int retval;
-
-        retval = acpi_bus_get_device(handle, &device);
-        if (retval) {
-                dbg("acpi_device not found\n");
-                return retval;
-        }
-
-        acpi_bus_trim(device);
-        return 0;
+        acpiphp_bus_trim(handle);
+        acpi_bus_scan(handle);
 }
 
 static void acpiphp_set_acpi_region(struct acpiphp_slot *slot)
@@ -649,7 +623,7 @@ static int __ref enable_device(struct acpiphp_slot *slot)
                 goto err_exit;
 
         list_for_each_entry(func, &slot->funcs, sibling)
-                acpiphp_bus_add(func);
+                acpiphp_bus_add(func_to_handle(func));
 
         num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0));
         if (num == 0) {