diff options
Diffstat (limited to 'drivers/acpi/acpica/nssearch.c')
| -rw-r--r-- | drivers/acpi/acpica/nssearch.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/nssearch.c b/drivers/acpi/acpica/nssearch.c index 4a9d4a66016e..47fbe5b33524 100644 --- a/drivers/acpi/acpica/nssearch.c +++ b/drivers/acpi/acpica/nssearch.c @@ -325,8 +325,26 @@ acpi_ns_search_and_enter(u32 target_name, * If we found it AND the request specifies that a find is an error, * return the error */ - if ((status == AE_OK) && (flags & ACPI_NS_ERROR_IF_FOUND)) { - status = AE_ALREADY_EXISTS; + if (status == AE_OK) { + + /* The node was found in the namespace */ + + /* + * If the namespace override feature is enabled for this node, + * delete any existing node. This can only happen during the + * boot stage, thus it is safe to remove the node here. + */ + if (flags & ACPI_NS_OVERRIDE_IF_FOUND) { + acpi_ns_delete_children(*return_node); + acpi_ns_remove_node(*return_node); + *return_node = ACPI_ENTRY_NOT_FOUND; + } + + /* Return an error if we don't expect to find the object */ + + else if (flags & ACPI_NS_ERROR_IF_FOUND) { + status = AE_ALREADY_EXISTS; + } } #ifdef ACPI_ASL_COMPILER if (*return_node && (*return_node)->type == ACPI_TYPE_ANY) { |