diff options
Diffstat (limited to 'drivers')
-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, | |||
285 | } | 285 | } |
286 | 286 | ||
287 | /* | 287 | /* |
288 | * If the BIOS has erroneously reversed the _PRT source_name (index 2) | ||
289 | * and the source_index (index 3), fix it. _PRT is important enough to | ||
290 | * workaround this BIOS error. This also provides compatibility with | ||
291 | * other ACPI implementations. | ||
292 | */ | ||
293 | obj_desc = sub_object_list[3]; | ||
294 | if (!obj_desc | ||
295 | || (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_INTEGER)) { | ||
296 | sub_object_list[3] = sub_object_list[2]; | ||
297 | sub_object_list[2] = obj_desc; | ||
298 | |||
299 | ACPI_WARNING((AE_INFO, | ||
300 | "(PRT[%X].Source) SourceName and SourceIndex are reversed, fixed", | ||
301 | index)); | ||
302 | } | ||
303 | |||
304 | /* | ||
288 | * 3) Third subobject: Dereference the PRT.source_name | 305 | * 3) Third subobject: Dereference the PRT.source_name |
289 | * The name may be unresolved (slack mode), so allow a null object | 306 | * The name may be unresolved (slack mode), so allow a null object |
290 | */ | 307 | */ |