Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

[linux-2.6-omap-h63xx.git] / drivers / acpi / resources / rscreate.c

diff --git a/drivers/acpi/resources/rscreate.c b/drivers/acpi/resources/rscreate.c
index faddaee1bc07529c38e5ce075a88e53077d6ab72..c0bbfa2c419319f92d9f561a98afe0eabb296971 100644 (file)
--- a/drivers/acpi/resources/rscreate.c
+++ b/drivers/acpi/resources/rscreate.c
@@ -43,7 +43,6 @@
 
 #include <acpi/acpi.h>
 #include <acpi/acresrc.h>
-#include <acpi/amlcode.h>
 #include <acpi/acnamesp.h>
 
 #define _COMPONENT          ACPI_RESOURCES
@@ -181,9 +180,9 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
        }
 
        /*
-        * Loop through the ACPI_INTERNAL_OBJECTS - Each object
-        * should be a package that in turn contains an
-        * acpi_integer Address, a u8 Pin, a Name and a u8 source_index.
+        * Loop through the ACPI_INTERNAL_OBJECTS - Each object should be a
+        * package that in turn contains an acpi_integer Address, a u8 Pin,
+        * a Name, and a u8 source_index.
         */
        top_object_list = package_object->package.elements;
        number_of_elements = package_object->package.count;
@@ -240,9 +239,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
                /* 1) First subobject: Dereference the PRT.Address */
 
                obj_desc = sub_object_list[0];
-               if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
-                       user_prt->address = obj_desc->integer.value;
-               } else {
+               if (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_INTEGER) {
                        ACPI_ERROR((AE_INFO,
                                    "(PRT[%X].Address) Need Integer, found %s",
                                    index,
@@ -250,12 +247,12 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
                        return_ACPI_STATUS(AE_BAD_DATA);
                }
 
+               user_prt->address = obj_desc->integer.value;
+
                /* 2) Second subobject: Dereference the PRT.Pin */
 
                obj_desc = sub_object_list[1];
-               if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
-                       user_prt->pin = (u32) obj_desc->integer.value;
-               } else {
+               if (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_INTEGER) {
                        ACPI_ERROR((AE_INFO,
                                    "(PRT[%X].Pin) Need Integer, found %s",
                                    index,
@@ -284,6 +281,25 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
                        }
                }
 
+               user_prt->pin = (u32) obj_desc->integer.value;
+
+               /*
+                * 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
@@ -293,13 +309,12 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
                        switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
                        case ACPI_TYPE_LOCAL_REFERENCE:
 
-                               if (obj_desc->reference.opcode !=
-                                   AML_INT_NAMEPATH_OP) {
+                               if (obj_desc->reference.class !=
+                                   ACPI_REFCLASS_NAME) {
                                        ACPI_ERROR((AE_INFO,
-                                                   "(PRT[%X].Source) Need name, found reference op %X",
+                                                   "(PRT[%X].Source) Need name, found Reference Class %X",
                                                    index,
-                                                   obj_desc->reference.
-                                                   opcode));
+                                                   obj_desc->reference.class));
                                        return_ACPI_STATUS(AE_BAD_DATA);
                                }
 
@@ -364,9 +379,7 @@ 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];
-               if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
-                       user_prt->source_index = (u32) obj_desc->integer.value;
-               } else {
+               if (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_INTEGER) {
                        ACPI_ERROR((AE_INFO,
                                    "(PRT[%X].SourceIndex) Need Integer, found %s",
                                    index,
@@ -374,6 +387,8 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
                        return_ACPI_STATUS(AE_BAD_DATA);
                }
 
+               user_prt->source_index = (u32) obj_desc->integer.value;
+
                /* Point to the next union acpi_operand_object in the top level package */
 
                top_object_list++;