diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/nsutils.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/nsutils.c b/drivers/acpi/acpica/nsutils.c index d2dfe6172181..596d4ccc963f 100644 --- a/drivers/acpi/acpica/nsutils.c +++ b/drivers/acpi/acpica/nsutils.c @@ -671,6 +671,8 @@ acpi_ns_get_node(struct acpi_namespace_node *prefix_node, ACPI_FUNCTION_TRACE_PTR(ns_get_node, ACPI_CAST_PTR(char, pathname)); + /* Simplest case is a null pathname */ + if (!pathname) { *return_node = prefix_node; if (!prefix_node) { @@ -679,6 +681,13 @@ acpi_ns_get_node(struct acpi_namespace_node *prefix_node, return_ACPI_STATUS(AE_OK); } + /* Quick check for a reference to the root */ + + if (ACPI_IS_ROOT_PREFIX(pathname[0]) && (!pathname[1])) { + *return_node = acpi_gbl_root_node; + return_ACPI_STATUS(AE_OK); + } + /* Convert path to internal representation */ status = acpi_ns_internalize_name(pathname, &internal_path); |