[PATCH v4 2/6] ACPI: dock: combine add|alloc_dock_dependent_device

Alex Chiang
2009-10-19T21:14:29Z

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>
---

drivers/acpi/dock.c | 55 ++++++++++++++++++---------------------------------
1 files changed, 19 insertions(+), 36 deletions(-)

diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 4f2aa98..347ea98 100644
--- 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
+ * @handle: handle of the dependent device
+ * @ds: The dock station
*
- * 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(acpi_handle handle, struct dock_station *ds)
{
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);