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authorLen Brown <len.brown@intel.com>2007-03-09 23:18:35 -0500
committerLen Brown <len.brown@intel.com>2007-03-09 23:18:35 -0500
commit3dfb737998c265d3c8a15b931dc4d72335ab8255 (patch)
tree37b5d37510b08782237256efdf805937d7aac4dc /drivers/acpi
parent63be2d9305a5865580c6faee2c1eb477c09eac18 (diff)
parent2f894ef9c8b36a35d80709bedca276d2fc691941 (diff)
Pull bugzilla-6859 into release branch
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/resources/rscreate.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/acpi/resources/rscreate.c b/drivers/acpi/resources/rscreate.c
index 1358c06a969..cc48ab05676 100644
--- a/drivers/acpi/resources/rscreate.c
+++ b/drivers/acpi/resources/rscreate.c
@@ -191,6 +191,9 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
for (index = 0; index < number_of_elements; index++) {
+ int source_name_index = 2;
+ int source_index_index = 3;
+
/*
* Point user_prt past this current structure
*
@@ -261,10 +264,28 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
}
/*
+ * If BIOS erroneously reversed the _PRT source_name and source_index,
+ * then reverse them back.
+ */
+ if (ACPI_GET_OBJECT_TYPE (sub_object_list[3]) != ACPI_TYPE_INTEGER) {
+ if (acpi_gbl_enable_interpreter_slack) {
+ source_name_index = 3;
+ source_index_index = 2;
+ printk(KERN_WARNING "ACPI: Handling Garbled _PRT entry\n");
+ } else {
+ ACPI_ERROR((AE_INFO,
+ "(PRT[%X].source_index) Need Integer, found %s",
+ index,
+ acpi_ut_get_object_type_name(sub_object_list[3])));
+ return_ACPI_STATUS(AE_BAD_DATA);
+ }
+ }
+
+ /*
* 3) Third subobject: Dereference the PRT.source_name
* The name may be unresolved (slack mode), so allow a null object
*/
- obj_desc = sub_object_list[2];
+ obj_desc = sub_object_list[source_name_index];
if (obj_desc) {
switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
case ACPI_TYPE_LOCAL_REFERENCE:
@@ -339,7 +360,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
/* 4) Fourth subobject: Dereference the PRT.source_index */
- obj_desc = sub_object_list[3];
+ obj_desc = sub_object_list[source_index_index];
if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
user_prt->source_index = (u32) obj_desc->integer.value;
} else {