ACPI: dock: combine add|alloc_dock_dependent_device (v2)

There's no real need to have a separate allocation step when adding
a dock dependent device.

Combining the two functions is both logical and helps with legibility.

Signed-off-by: Alex Chiang <achiang@hp.com>
Acked-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 4f2aa98e2cee497f6a3a763f01bd7703b7673ff2..ee9829b47e20226de103c1ec0c2a78d91f7fc588 100644 (file)
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -93,40 +93,30 @@ struct dock_dependent_device {
  *                         Dock Dependent device functions                   *
  *****************************************************************************/
 /**
- *  alloc_dock_dependent_device - allocate and init a dependent device
- *  @handle: the acpi_handle of the dependent device
+ * add_dock_dependent_device - associate a device with the dock station
+ * @ds: The dock station
+ * @handle: handle of the dependent device
  *
- *  Allocate memory for a dependent device structure for a device referenced
- *  by the acpi handle
+ * Add the dependent device to the dock's dependent device list.
  */
-static struct dock_dependent_device *
-alloc_dock_dependent_device(acpi_handle handle)
+static int
+add_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
 {
        struct dock_dependent_device *dd;
 
        dd = kzalloc(sizeof(*dd), GFP_KERNEL);
-       if (dd) {
-               dd->handle = handle;
-               INIT_LIST_HEAD(&dd->list);
-               INIT_LIST_HEAD(&dd->hotplug_list);
-       }
-       return dd;
-}
+       if (!dd)
+               return -ENOMEM;
+
+       dd->handle = handle;
+       INIT_LIST_HEAD(&dd->list);
+       INIT_LIST_HEAD(&dd->hotplug_list);
 
-/**
- * add_dock_dependent_device - associate a device with the dock station
- * @ds: The dock station
- * @dd: The dependent device
- *
- * Add the dependent device to the dock's dependent device list.
- */
-static void
-add_dock_dependent_device(struct dock_station *ds,
-                         struct dock_dependent_device *dd)
-{
        spin_lock(&ds->dd_lock);
        list_add_tail(&dd->list, &ds->dependent_devices);
        spin_unlock(&ds->dd_lock);
+
+       return 0;
 }
 
 /**
@@ -826,7 +816,6 @@ find_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv)
        acpi_status status;
        acpi_handle tmp, parent;
        struct dock_station *ds = context;
-       struct dock_dependent_device *dd;
 
        status = acpi_bus_get_ejd(handle, &tmp);
        if (ACPI_FAILURE(status)) {
@@ -840,11 +829,9 @@ find_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv)
                        goto fdd_out;
        }
 
-       if (tmp == ds->handle) {
-               dd = alloc_dock_dependent_device(handle);
-               if (dd)
-                       add_dock_dependent_device(ds, dd);
-       }
+       if (tmp == ds->handle)
+               add_dock_dependent_device(ds, handle);
+
 fdd_out:
        return AE_OK;
 }
@@ -959,7 +946,6 @@ static struct attribute_group dock_attribute_group = {
 static int dock_add(acpi_handle handle)
 {
        int ret;
-       struct dock_dependent_device *dd;
        struct dock_station *dock_station;
        struct platform_device *dock_device;
 
@@ -1008,12 +994,9 @@ static int dock_add(acpi_handle handle)
                            NULL);
 
        /* add the dock station as a device dependent on itself */
-       dd = alloc_dock_dependent_device(handle);
-       if (!dd) {
-               ret = -ENOMEM;
+       ret = add_dock_dependent_device(dock_station, handle);
+       if (ret)
                goto err_rmgroup;
-       }
-       add_dock_dependent_device(dock_station, dd);
 
        dock_station_count++;
        list_add(&dock_station->sibling, &dock_stations);