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path: root/drivers/acpi/acpica/nsxfeval.c
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Diffstat (limited to 'drivers/acpi/acpica/nsxfeval.c')
-rw-r--r--drivers/acpi/acpica/nsxfeval.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/drivers/acpi/acpica/nsxfeval.c b/drivers/acpi/acpica/nsxfeval.c
index 4929dbdbc8f0..f2bd1da77001 100644
--- a/drivers/acpi/acpica/nsxfeval.c
+++ b/drivers/acpi/acpica/nsxfeval.c
@@ -433,8 +433,11 @@ static void acpi_ns_resolve_references(struct acpi_evaluate_info *info)
* PARAMETERS: Type - acpi_object_type to search for
* start_object - Handle in namespace where search begins
* max_depth - Depth to which search is to reach
- * user_function - Called when an object of "Type" is found
- * Context - Passed to user function
+ * pre_order_visit - Called during tree pre-order visit
+ * when an object of "Type" is found
+ * post_order_visit - Called during tree post-order visit
+ * when an object of "Type" is found
+ * Context - Passed to user function(s) above
* return_value - Location where return value of
* user_function is put if terminated early
*
@@ -443,16 +446,16 @@ static void acpi_ns_resolve_references(struct acpi_evaluate_info *info)
*
* DESCRIPTION: Performs a modified depth-first walk of the namespace tree,
* starting (and ending) at the object specified by start_handle.
- * The user_function is called whenever an object that matches
- * the type parameter is found. If the user function returns
+ * The callback function is called whenever an object that matches
+ * the type parameter is found. If the callback function returns
* a non-zero value, the search is terminated immediately and this
* value is returned to the caller.
*
* The point of this procedure is to provide a generic namespace
* walk routine that can be called from multiple places to
- * provide multiple services; the User Function can be tailored
- * to each task, whether it is a print function, a compare
- * function, etc.
+ * provide multiple services; the callback function(s) can be
+ * tailored to each task, whether it is a print function,
+ * a compare function, etc.
*
******************************************************************************/
@@ -460,7 +463,8 @@ acpi_status
acpi_walk_namespace(acpi_object_type type,
acpi_handle start_object,
u32 max_depth,
- acpi_walk_callback user_function,
+ acpi_walk_callback pre_order_visit,
+ acpi_walk_callback post_order_visit,
void *context, void **return_value)
{
acpi_status status;
@@ -469,7 +473,8 @@ acpi_walk_namespace(acpi_object_type type,
/* Parameter validation */
- if ((type > ACPI_TYPE_LOCAL_MAX) || (!max_depth) || (!user_function)) {
+ if ((type > ACPI_TYPE_LOCAL_MAX) ||
+ (!max_depth) || (!pre_order_visit && !post_order_visit)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
@@ -501,8 +506,9 @@ acpi_walk_namespace(acpi_object_type type,
}
status = acpi_ns_walk_namespace(type, start_object, max_depth,
- ACPI_NS_WALK_UNLOCK, user_function,
- context, return_value);
+ ACPI_NS_WALK_UNLOCK, pre_order_visit,
+ post_order_visit, context,
+ return_value);
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
@@ -681,8 +687,8 @@ acpi_get_devices(const char *HID,
status = acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK,
- acpi_ns_get_device_callback, &info,
- return_value);
+ acpi_ns_get_device_callback, NULL,
+ &info, return_value);
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return_ACPI_STATUS(status);