ACPICA: ACPI 5.1: Add support for runtime validation of _DSD package.

Adds ACPICA kernel runtime support to validate contents/format
of the _DSD package, similar to the iASL support. Ported by
Mika Westerberg.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpica/nsprepkg.c b/drivers/acpi/acpica/nsprepkg.c
index 68f7258..1b13b92 100644 (file)
--- a/drivers/acpi/acpica/nsprepkg.c
+++ b/drivers/acpi/acpica/nsprepkg.c
@@ -316,6 +316,45 @@ acpi_ns_check_package(struct acpi_evaluate_info *info,
                    acpi_ns_check_package_list(info, package, elements, count);
                break;
 
+       case ACPI_PTYPE2_UUID_PAIR:
+
+               /* The package must contain pairs of (UUID + type) */
+
+               if (count & 1) {
+                       expected_count = count + 1;
+                       goto package_too_small;
+               }
+
+               while (count > 0) {
+                       status = acpi_ns_check_object_type(info, elements,
+                                                          package->ret_info.
+                                                          object_type1, 0);
+                       if (ACPI_FAILURE(status)) {
+                               return (status);
+                       }
+
+                       /* Validate length of the UUID buffer */
+
+                       if ((*elements)->buffer.length != 16) {
+                               ACPI_WARN_PREDEFINED((AE_INFO,
+                                                     info->full_pathname,
+                                                     info->node_flags,
+                                                     "Invalid length for UUID Buffer"));
+                               return (AE_AML_OPERAND_VALUE);
+                       }
+
+                       status = acpi_ns_check_object_type(info, elements + 1,
+                                                          package->ret_info.
+                                                          object_type2, 0);
+                       if (ACPI_FAILURE(status)) {
+                               return (status);
+                       }
+
+                       elements += 2;
+                       count -= 2;
+               }
+               break;
+
        default:
 
                /* Should not get here if predefined info table is correct */