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ACPI: Revert conflicting workaround for BIOS w/ mangled PRT entries 

2f894ef9c8
in Linux-2.6.21 worked around BIOS with mangled _PRT entries:
http://bugzilla.kernel.org/show_bug.cgi?id=6859

d0e184abc5
worked around the same issue via ACPICA, and shipped in 2.6.27.

Unfortunately the two workarounds conflict:
http://bugzilla.kernel.org/show_bug.cgi?id=12270

So revert the Linux specific one.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhang Rui 2009-04-08 09:44:29 +08:00 committed by Len Brown
parent 577c9c456f
commit 82babbb388
1 changed files with 2 additions and 25 deletions
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27
drivers/acpi/acpica/rscreate.c
View File

@ -191,8 +191,6 @@ 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
@ -261,27 +259,6 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
return_ACPI_STATUS(AE_BAD_DATA);
}
/*
* If BIOS erroneously reversed the _PRT source_name and source_index,
* then reverse them back.
*/
if ((sub_object_list[3])->common.type !=
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);
}
}
user_prt->pin = (u32) obj_desc->integer.value;
/*
@ -304,7 +281,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
* 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[source_name_index];
obj_desc = sub_object_list[2];
if (obj_desc) {
switch (obj_desc->common.type) {
case ACPI_TYPE_LOCAL_REFERENCE:
@ -378,7 +355,7 @@ 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[source_index_index];
obj_desc = sub_object_list[3];
if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
ACPI_ERROR((AE_INFO,
"(PRT[%X].SourceIndex) Need Integer, found %s",