diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/acpica/utdelete.c | 42 |
1 files changed, 33 insertions, 9 deletions
diff --git a/drivers/acpi/acpica/utdelete.c b/drivers/acpi/acpica/utdelete.c index 798105443d0f..e806fb02187b 100644 --- a/drivers/acpi/acpica/utdelete.c +++ b/drivers/acpi/acpica/utdelete.c @@ -530,18 +530,42 @@ acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action) */ for (i = 0; i < object->package.count; i++) { /* - * Push each element onto the stack for later processing. - * Note: There can be null elements within the package, - * these are simply ignored + * Null package elements are legal and can be simply + * ignored. */ - status = - acpi_ut_create_update_state_and_push - (object->package.elements[i], action, - &state_list); - if (ACPI_FAILURE(status)) { - goto error_exit; + next_object = object->package.elements[i]; + if (!next_object) { + continue; + } + + switch (next_object->common.type) { + case ACPI_TYPE_INTEGER: + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + /* + * For these very simple sub-objects, we can just + * update the reference count here and continue. + * Greatly increases performance of this operation. + */ + acpi_ut_update_ref_count(next_object, + action); + break; + + default: + /* + * For complex sub-objects, push them onto the stack + * for later processing (this eliminates recursion.) + */ + status = + acpi_ut_create_update_state_and_push + (next_object, action, &state_list); + if (ACPI_FAILURE(status)) { + goto error_exit; + } + break; } } + next_object = NULL; break; case ACPI_TYPE_BUFFER_FIELD: |