diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 578b99b..3c3dee8 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -524,7 +524,7 @@
  */
 static void dock_notify(acpi_handle handle, u32 event, void *data)
 {
-	struct dock_station *ds = (struct dock_station *)data;
+	struct dock_station *ds = data;
 
 	switch (event) {
 	case ACPI_NOTIFY_BUS_CHECK:
@@ -587,7 +587,7 @@
 {
 	acpi_status status;
 	acpi_handle tmp;
-	struct dock_station *ds = (struct dock_station *)context;
+	struct dock_station *ds = context;
 	struct dock_dependent_device *dd;
 
 	status = acpi_bus_get_ejd(handle, &tmp);
@@ -702,7 +702,7 @@
 static acpi_status
 find_dock(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
-	int *count = (int *)context;
+	int *count = context;
 	acpi_status status = AE_OK;
 
 	if (is_dock(handle)) {