diff options
| -rw-r--r-- | drivers/acpi/acpica/acpredef.h | 5 | ||||
| -rw-r--r-- | drivers/acpi/acpica/nsprepkg.c | 86 |
2 files changed, 89 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/acpredef.h b/drivers/acpi/acpica/acpredef.h index 4ca426b55509..888440b2cf2e 100644 --- a/drivers/acpi/acpica/acpredef.h +++ b/drivers/acpi/acpica/acpredef.h @@ -129,7 +129,8 @@ enum acpi_return_package_types { ACPI_PTYPE2_REV_FIXED = 9, ACPI_PTYPE2_FIX_VAR = 10, ACPI_PTYPE2_VAR_VAR = 11, - ACPI_PTYPE2_UUID_PAIR = 12 + ACPI_PTYPE2_UUID_PAIR = 12, + ACPI_PTYPE_CUSTOM = 13 }; /* Support macros for users of the predefined info table */ @@ -340,7 +341,7 @@ const union acpi_predefined_info acpi_gbl_predefined_methods[] = { {{"_BIX", METHOD_0ARGS, METHOD_RETURNS(ACPI_RTYPE_PACKAGE)}}, /* Fixed-length (16 Int),(4 Str) */ - PACKAGE_INFO(ACPI_PTYPE1_FIXED, ACPI_RTYPE_INTEGER, 16, + PACKAGE_INFO(ACPI_PTYPE_CUSTOM, ACPI_RTYPE_INTEGER, 16, ACPI_RTYPE_STRING, 4, 0), {{"_BLT", diff --git a/drivers/acpi/acpica/nsprepkg.c b/drivers/acpi/acpica/nsprepkg.c index fde5a09819e0..fbedc6e8ab36 100644 --- a/drivers/acpi/acpica/nsprepkg.c +++ b/drivers/acpi/acpica/nsprepkg.c @@ -62,6 +62,10 @@ acpi_ns_check_package_elements(struct acpi_evaluate_info *info, u32 count1, u8 type2, u32 count2, u32 start_index); +static acpi_status +acpi_ns_custom_package(struct acpi_evaluate_info *info, + union acpi_operand_object **elements, u32 count); + /******************************************************************************* * * FUNCTION: acpi_ns_check_package @@ -135,6 +139,11 @@ acpi_ns_check_package(struct acpi_evaluate_info *info, * PTYPE2 packages contain subpackages */ switch (package->ret_info.type) { + case ACPI_PTYPE_CUSTOM: + + status = acpi_ns_custom_package(info, elements, count); + break; + case ACPI_PTYPE1_FIXED: /* * The package count is fixed and there are no subpackages @@ -626,6 +635,83 @@ package_too_small: /******************************************************************************* * + * FUNCTION: acpi_ns_custom_package + * + * PARAMETERS: info - Method execution information block + * elements - Pointer to the package elements array + * count - Element count for the package + * + * RETURN: Status + * + * DESCRIPTION: Check a returned package object for the correct count and + * correct type of all sub-objects. + * + * NOTE: Currently used for the _BIX method only. When needed for two or more + * methods, probably a detect/dispatch mechanism will be required. + * + ******************************************************************************/ + +static acpi_status +acpi_ns_custom_package(struct acpi_evaluate_info *info, + union acpi_operand_object **elements, u32 count) +{ + u32 expected_count; + u32 version; + acpi_status status = AE_OK; + + ACPI_FUNCTION_NAME(ns_custom_package); + + /* Get version number, must be Integer */ + + if ((*elements)->common.type != ACPI_TYPE_INTEGER) { + ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, + info->node_flags, + "Return Package has invalid object type for version number")); + return_ACPI_STATUS(AE_AML_OPERAND_TYPE); + } + + version = (u32)(*elements)->integer.value; + expected_count = 21; /* Version 1 */ + + if (version == 0) { + expected_count = 20; /* Version 0 */ + } + + if (count < expected_count) { + ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, + info->node_flags, + "Return Package is too small - found %u elements, expected %u", + count, expected_count)); + return_ACPI_STATUS(AE_AML_OPERAND_VALUE); + } else if (count > expected_count) { + ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, + "%s: Return Package is larger than needed - " + "found %u, expected %u\n", + info->full_pathname, count, expected_count)); + } + + /* Validate all elements of the returned package */ + + status = acpi_ns_check_package_elements(info, elements, + ACPI_RTYPE_INTEGER, 16, + ACPI_RTYPE_STRING, 4, 0); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Version 1 has a single trailing integer */ + + if (version > 0) { + status = acpi_ns_check_package_elements(info, elements + 20, + ACPI_RTYPE_INTEGER, 1, + 0, 0, 20); + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * * FUNCTION: acpi_ns_check_package_elements * * PARAMETERS: info - Method execution information block |