linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / drivers / acpi / resources / rslist.c

diff --git a/drivers/acpi/resources/rslist.c b/drivers/acpi/resources/rslist.c
index 29423ce..1434e78 100644 (file)
--- a/drivers/acpi/resources/rslist.c
+++ b/drivers/acpi/resources/rslist.c
@@ -51,62 +51,76 @@ ACPI_MODULE_NAME("rslist")
  *
  * FUNCTION:    acpi_rs_convert_aml_to_resources
  *
- * PARAMETERS:  acpi_walk_aml_callback
- *              resource_ptr            - Pointer to the buffer that will
- *                                        contain the output structures
+ * PARAMETERS:  Aml                 - Pointer to the resource byte stream
+ *              aml_length          - Length of Aml
+ *              output_buffer       - Pointer to the buffer that will
+ *                                    contain the output structures
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Convert an AML resource to an internal representation of the
- *              resource that is aligned and easier to access.
+ * DESCRIPTION: Takes the resource byte stream and parses it, creating a
+ *              linked list of resources in the caller's output buffer
  *
  ******************************************************************************/
 acpi_status
-acpi_rs_convert_aml_to_resources(u8 * aml,
-                                u32 length,
-                                u32 offset, u8 resource_index, void **context)
+acpi_rs_convert_aml_to_resources(u8 * aml, u32 aml_length, u8 * output_buffer)
 {
-       struct acpi_resource **resource_ptr =
-           ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context);
-       struct acpi_resource *resource;
+       struct acpi_resource *resource = (void *)output_buffer;
        acpi_status status;
+       u8 resource_index;
+       u8 *end_aml;
 
-       ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources);
+       ACPI_FUNCTION_TRACE("rs_convert_aml_to_resources");
 
-       /*
-        * Check that the input buffer and all subsequent pointers into it
-        * are aligned on a native word boundary. Most important on IA64
-        */
-       resource = *resource_ptr;
-       if (ACPI_IS_MISALIGNED(resource)) {
-               ACPI_WARNING((AE_INFO,
-                             "Misaligned resource pointer %p", resource));
-       }
+       end_aml = aml + aml_length;
 
-       /* Convert the AML byte stream resource to a local resource struct */
-
-       status =
-           acpi_rs_convert_aml_to_resource(resource,
-                                           ACPI_CAST_PTR(union aml_resource,
-                                                         aml),
-                                           acpi_gbl_get_resource_dispatch
-                                           [resource_index]);
-       if (ACPI_FAILURE(status)) {
-               ACPI_EXCEPTION((AE_INFO, status,
-                               "Could not convert AML resource (Type %X)",
-                               *aml));
-               return_ACPI_STATUS(status);
-       }
+       /* Loop until end-of-buffer or an end_tag is found */
+
+       while (aml < end_aml) {
+               /* Validate the Resource Type and Resource Length */
+
+               status = acpi_ut_validate_resource(aml, &resource_index);
+               if (ACPI_FAILURE(status)) {
+                       return_ACPI_STATUS(status);
+               }
+
+               /* Convert the AML byte stream resource to a local resource struct */
 
-       ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
-                         "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
-                         acpi_ut_get_resource_type(aml), length,
-                         resource->length));
+               status =
+                   acpi_rs_convert_aml_to_resource(resource,
+                                                   ACPI_CAST_PTR(union
+                                                                 aml_resource,
+                                                                 aml),
+                                                   acpi_gbl_get_resource_dispatch
+                                                   [resource_index]);
+               if (ACPI_FAILURE(status)) {
+                       ACPI_EXCEPTION((AE_INFO, status,
+                                       "Could not convert AML resource (Type %X)",
+                                       *aml));
+                       return_ACPI_STATUS(status);
+               }
 
-       /* Point to the next structure in the output buffer */
+               /* Normal exit on completion of an end_tag resource descriptor */
 
-       *resource_ptr = ACPI_ADD_PTR(void, resource, resource->length);
-       return_ACPI_STATUS(AE_OK);
+               if (acpi_ut_get_resource_type(aml) ==
+                   ACPI_RESOURCE_NAME_END_TAG) {
+                       return_ACPI_STATUS(AE_OK);
+               }
+
+               /* Point to the next input AML resource */
+
+               aml += acpi_ut_get_descriptor_length(aml);
+
+               /* Point to the next structure in the output buffer */
+
+               resource =
+                   ACPI_ADD_PTR(struct acpi_resource, resource,
+                                resource->length);
+       }
+
+       /* Did not find an end_tag resource descriptor */
+
+       return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
 }
 
 /*******************************************************************************
@@ -136,12 +150,11 @@ acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
        u8 *end_aml = output_buffer + aml_size_needed;
        acpi_status status;
 
-       ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml);
+       ACPI_FUNCTION_TRACE("rs_convert_resources_to_aml");
 
        /* Walk the resource descriptor list, convert each descriptor */
 
        while (aml < end_aml) {
-
                /* Validate the (internal) Resource Type */
 
                if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
@@ -178,7 +191,6 @@ acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
                /* Check for end-of-list, normal exit */
 
                if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
-
                        /* An End Tag indicates the end of the input Resource Template */
 
                        return_ACPI_STATUS(AE_OK);