diff options
| -rw-r--r-- | drivers/acpi/resources/rscreate.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/acpi/resources/rscreate.c b/drivers/acpi/resources/rscreate.c index faddaee1bc07..70c84ece87f1 100644 --- a/drivers/acpi/resources/rscreate.c +++ b/drivers/acpi/resources/rscreate.c @@ -285,6 +285,23 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object, } /* + * If the BIOS has erroneously reversed the _PRT source_name (index 2) + * and the source_index (index 3), fix it. _PRT is important enough to + * workaround this BIOS error. This also provides compatibility with + * other ACPI implementations. + */ + obj_desc = sub_object_list[3]; + if (!obj_desc + || (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_INTEGER)) { + sub_object_list[3] = sub_object_list[2]; + sub_object_list[2] = obj_desc; + + ACPI_WARNING((AE_INFO, + "(PRT[%X].Source) SourceName and SourceIndex are reversed, fixed", + index)); + } + + /* * 3) Third subobject: Dereference the PRT.source_name * The name may be unresolved (slack mode), so allow a null object */ |