From 52fc0b026e99b5d5d585095148d997d5634bbc25 Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Mon, 2 Oct 2006 00:00:00 -0400 Subject: [ACPI] ACPICA 20060210 Removed a couple of extraneous ACPI_ERROR messages that appeared during normal execution. These became apparent after the conversion from ACPI_DEBUG_PRINT. Fixed a problem where the CreateField operator could hang if the BitIndex or NumBits parameter referred to a named object. From Valery Podrezov. http://bugzilla.kernel.org/show_bug.cgi?id=5359 Fixed a problem where a DeRefOf operation on a buffer object incorrectly failed with an exception. This also fixes a couple of related RefOf and DeRefOf issues. From Valery Podrezov. http://bugzilla.kernel.org/show_bug.cgi?id=5360 http://bugzilla.kernel.org/show_bug.cgi?id=5387 http://bugzilla.kernel.org/show_bug.cgi?id=5392 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of AE_STRING_LIMIT on an out-of-bounds Index() operation. From Valery Podrezov. http://bugzilla.kernel.org/show_bug.cgi?id=5480 Implemented a memory cleanup at the end of the execution of each iteration of an AML While() loop, preventing the accumulation of outstanding objects. From Valery Podrezov. http://bugzilla.kernel.org/show_bug.cgi?id=5427 Eliminated a chunk of duplicate code in the object resolution code. From Valery Podrezov. http://bugzilla.kernel.org/show_bug.cgi?id=5336 Fixed several warnings during the 64-bit code generation. Signed-off-by: Bob Moore Signed-off-by: Len Brown --- drivers/acpi/dispatcher/dsfield.c | 1 + drivers/acpi/dispatcher/dsmethod.c | 5 +++++ drivers/acpi/dispatcher/dsmthdat.c | 1 + drivers/acpi/dispatcher/dsobject.c | 6 ++++++ drivers/acpi/dispatcher/dsopcode.c | 4 ++++ drivers/acpi/dispatcher/dsutils.c | 7 ++++++- drivers/acpi/dispatcher/dswexec.c | 3 +++ drivers/acpi/dispatcher/dswload.c | 9 +++++++++ drivers/acpi/dispatcher/dswscope.c | 2 ++ drivers/acpi/dispatcher/dswstate.c | 5 +++++ 10 files changed, 42 insertions(+), 1 deletion(-) (limited to 'drivers/acpi/dispatcher') diff --git a/drivers/acpi/dispatcher/dsfield.c b/drivers/acpi/dispatcher/dsfield.c index 76bc0463f6de..3d33bcc98678 100644 --- a/drivers/acpi/dispatcher/dsfield.c +++ b/drivers/acpi/dispatcher/dsfield.c @@ -425,6 +425,7 @@ acpi_ds_init_field_objects(union acpi_parse_object *op, * Walk the list of entries in the field_list */ while (arg) { + /* Ignore OFFSET and ACCESSAS terms here */ if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c index c475546535b6..238916ce5412 100644 --- a/drivers/acpi/dispatcher/dsmethod.c +++ b/drivers/acpi/dispatcher/dsmethod.c @@ -81,6 +81,7 @@ acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state) /* Invoke the global exception handler */ if (acpi_gbl_exception_handler) { + /* Exit the interpreter, allow handler to execute methods */ acpi_ex_exit_interpreter(); @@ -100,6 +101,7 @@ acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state) } #ifdef ACPI_DISASSEMBLER if (ACPI_FAILURE(status)) { + /* Display method locals/args if disassembler is present */ acpi_dm_dump_method_info(status, walk_state, walk_state->op); @@ -249,6 +251,7 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread, } if (!(obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY)) { + /* 1) Parse: Create a new walk state for the preempting walk */ next_walk_state = @@ -378,9 +381,11 @@ acpi_ds_restart_control_method(struct acpi_walk_state *walk_state, /* Did the called method return a value? */ if (return_desc) { + /* Are we actually going to use the return value? */ if (walk_state->return_used) { + /* Save the return value from the previous method */ status = acpi_ds_result_push(return_desc, walk_state); diff --git a/drivers/acpi/dispatcher/dsmthdat.c b/drivers/acpi/dispatcher/dsmthdat.c index c025674f938b..f7cb5170aa11 100644 --- a/drivers/acpi/dispatcher/dsmthdat.c +++ b/drivers/acpi/dispatcher/dsmthdat.c @@ -701,6 +701,7 @@ acpi_ds_method_data_get_type(u16 opcode, object = acpi_ns_get_attached_object(node); if (!object) { + /* Uninitialized local/arg, return TYPE_ANY */ return_VALUE(ACPI_TYPE_ANY); diff --git a/drivers/acpi/dispatcher/dsobject.c b/drivers/acpi/dispatcher/dsobject.c index 8b21f0f9e517..1f2d0c6ef36c 100644 --- a/drivers/acpi/dispatcher/dsobject.c +++ b/drivers/acpi/dispatcher/dsobject.c @@ -103,6 +103,7 @@ acpi_ds_build_internal_object(struct acpi_walk_state *walk_state, common. node))); if (ACPI_FAILURE(status)) { + /* Check if we are resolving a named reference within a package */ if ((status == AE_NOT_FOUND) @@ -195,6 +196,7 @@ acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state, */ obj_desc = *obj_desc_ptr; if (!obj_desc) { + /* Create a new buffer object */ obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); @@ -355,6 +357,7 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state, arg = arg->common.next; for (i = 0; arg; i++) { if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) { + /* Object (package or buffer) is already built */ obj_desc->package.elements[i] = @@ -408,6 +411,7 @@ acpi_ds_create_node(struct acpi_walk_state *walk_state, } if (!op->common.value.arg) { + /* No arguments, there is nothing to do */ return_ACPI_STATUS(AE_OK); @@ -469,6 +473,7 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state, obj_desc = *ret_obj_desc; op_info = acpi_ps_get_opcode_info(opcode); if (op_info->class == AML_CLASS_UNKNOWN) { + /* Unknown opcode */ return_ACPI_STATUS(AE_TYPE); @@ -626,6 +631,7 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state, default: /* Other literals, etc.. */ if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { + /* Node was saved in Op */ obj_desc->reference.node = op->common.node; diff --git a/drivers/acpi/dispatcher/dsopcode.c b/drivers/acpi/dispatcher/dsopcode.c index 6229c10674e1..8a690a9963f2 100644 --- a/drivers/acpi/dispatcher/dsopcode.c +++ b/drivers/acpi/dispatcher/dsopcode.c @@ -640,6 +640,7 @@ acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state, /* Initialize the Buffer Field */ if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { + /* NOTE: Slightly different operands for this opcode */ status = @@ -984,6 +985,7 @@ acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state, ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", op)); if (walk_state->control_state->common.value) { + /* Predicate was true, go back and evaluate it again! */ status = AE_CTRL_PENDING; @@ -1014,6 +1016,7 @@ acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state, * has been bubbled up the tree */ if (op->common.value.arg) { + /* Since we have a real Return(), delete any implicit return */ acpi_ds_clear_implicit_return(walk_state); @@ -1047,6 +1050,7 @@ acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state, walk_state->return_desc = walk_state->operands[0]; } else if ((walk_state->results) && (walk_state->results->results.num_results > 0)) { + /* Since we have a real Return(), delete any implicit return */ acpi_ds_clear_implicit_return(walk_state); diff --git a/drivers/acpi/dispatcher/dsutils.c b/drivers/acpi/dispatcher/dsutils.c index 53356a591ac1..3fbe17ebef5a 100644 --- a/drivers/acpi/dispatcher/dsutils.c +++ b/drivers/acpi/dispatcher/dsutils.c @@ -202,6 +202,7 @@ acpi_ds_is_result_used(union acpi_parse_object * op, */ if ((!op->common.parent) || (op->common.parent->common.aml_opcode == AML_SCOPE_OP)) { + /* No parent, the return value cannot possibly be used */ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, @@ -352,6 +353,7 @@ acpi_ds_delete_result_if_not_used(union acpi_parse_object *op, } if (!acpi_ds_is_result_used(op, walk_state)) { + /* Must pop the result stack (obj_desc should be equal to result_obj) */ status = acpi_ds_result_pop(&obj_desc, walk_state); @@ -498,7 +500,9 @@ acpi_ds_create_operand(struct acpi_walk_state *walk_state, */ if ((walk_state->deferred_node) && (walk_state->deferred_node->type == ACPI_TYPE_BUFFER_FIELD) - && (arg_index != 0)) { + && (arg_index == + (u32) ((walk_state->opcode == + AML_CREATE_FIELD_OP) ? 3 : 2))) { obj_desc = ACPI_CAST_PTR(union acpi_operand_object, walk_state->deferred_node); @@ -521,6 +525,7 @@ acpi_ds_create_operand(struct acpi_walk_state *walk_state, && (parent_op->common.aml_opcode != AML_REGION_OP) && (parent_op->common.aml_opcode != AML_INT_NAMEPATH_OP)) { + /* Enter name into namespace if not found */ interpreter_mode = ACPI_IMODE_LOAD_PASS2; diff --git a/drivers/acpi/dispatcher/dswexec.c b/drivers/acpi/dispatcher/dswexec.c index f1af655ff113..198949f41048 100644 --- a/drivers/acpi/dispatcher/dswexec.c +++ b/drivers/acpi/dispatcher/dswexec.c @@ -409,6 +409,7 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state) * being the object_type and size_of operators. */ if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) { + /* Resolve all operands */ status = acpi_ex_resolve_operands(walk_state->opcode, @@ -548,6 +549,7 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state) */ status = acpi_ds_resolve_operands(walk_state); if (ACPI_FAILURE(status)) { + /* On error, clear all resolved operands */ acpi_ds_clear_operands(walk_state); @@ -722,6 +724,7 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state) cleanup: if (walk_state->result_obj) { + /* Break to debugger to display result */ ACPI_DEBUGGER_EXEC(acpi_db_display_result_object diff --git a/drivers/acpi/dispatcher/dswload.c b/drivers/acpi/dispatcher/dswload.c index d3d24da31c81..02b03126e14e 100644 --- a/drivers/acpi/dispatcher/dswload.c +++ b/drivers/acpi/dispatcher/dswload.c @@ -261,6 +261,7 @@ acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state, */ if (walk_state->deferred_node) { + /* This name is already in the namespace, get the node */ node = walk_state->deferred_node; @@ -311,6 +312,7 @@ acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state, /* Common exit */ if (!op) { + /* Create a new op */ op = acpi_ps_alloc_op(walk_state->opcode); @@ -413,6 +415,7 @@ acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state) #endif if (op->common.aml_opcode == AML_NAME_OP) { + /* For Name opcode, get the object type from the argument */ if (op->common.value.arg) { @@ -521,6 +524,7 @@ acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state, if ((walk_state->control_state) && (walk_state->control_state->common.state == ACPI_CONTROL_CONDITIONAL_EXECUTING)) { + /* We are executing a while loop outside of a method */ status = acpi_ds_exec_begin_op(walk_state, out_op); @@ -554,10 +558,12 @@ acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state, /* Get the name we are going to enter or lookup in the namespace */ if (walk_state->opcode == AML_INT_NAMEPATH_OP) { + /* For Namepath op, get the path string */ buffer_ptr = op->common.value.string; if (!buffer_ptr) { + /* No name, just exit */ return_ACPI_STATUS(AE_OK); @@ -680,6 +686,7 @@ acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state, /* All other opcodes */ if (op && op->common.node) { + /* This op/node was previously entered into the namespace */ node = op->common.node; @@ -705,6 +712,7 @@ acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state, * Note: Name may already exist if we are executing a deferred opcode. */ if (walk_state->deferred_node) { + /* This name is already in the namespace, get the node */ node = walk_state->deferred_node; @@ -727,6 +735,7 @@ acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state, } if (!op) { + /* Create a new op */ op = acpi_ps_alloc_op(walk_state->opcode); diff --git a/drivers/acpi/dispatcher/dswscope.c b/drivers/acpi/dispatcher/dswscope.c index ada21ef4a174..e2954fff8c5e 100644 --- a/drivers/acpi/dispatcher/dswscope.c +++ b/drivers/acpi/dispatcher/dswscope.c @@ -66,6 +66,7 @@ void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state) ACPI_FUNCTION_NAME("ds_scope_stack_clear"); while (walk_state->scope_info) { + /* Pop a scope off the stack */ scope_info = walk_state->scope_info; @@ -105,6 +106,7 @@ acpi_ds_scope_stack_push(struct acpi_namespace_node *node, ACPI_FUNCTION_TRACE("ds_scope_stack_push"); if (!node) { + /* Invalid scope */ ACPI_ERROR((AE_INFO, "Null scope parameter")); diff --git a/drivers/acpi/dispatcher/dswstate.c b/drivers/acpi/dispatcher/dswstate.c index fa78cb74ee36..5bc340b1b286 100644 --- a/drivers/acpi/dispatcher/dswstate.c +++ b/drivers/acpi/dispatcher/dswstate.c @@ -170,6 +170,7 @@ acpi_ds_result_pop(union acpi_operand_object ** object, state->results.num_results--; for (index = ACPI_OBJ_NUM_OPERANDS; index; index--) { + /* Check for a valid result object */ if (state->results.obj_desc[index - 1]) { @@ -448,6 +449,7 @@ acpi_ds_obj_stack_pop(u32 pop_count, struct acpi_walk_state * walk_state) ACPI_FUNCTION_NAME("ds_obj_stack_pop"); for (i = 0; i < pop_count; i++) { + /* Check for stack underflow */ if (walk_state->num_operands == 0) { @@ -494,6 +496,7 @@ acpi_ds_obj_stack_pop_and_delete(u32 pop_count, ACPI_FUNCTION_NAME("ds_obj_stack_pop_and_delete"); for (i = 0; i < pop_count; i++) { + /* Check for stack underflow */ if (walk_state->num_operands == 0) { @@ -598,6 +601,7 @@ struct acpi_walk_state *acpi_ds_pop_walk_state(struct acpi_thread_state *thread) walk_state = thread->walk_state_list; if (walk_state) { + /* Next walk state becomes the current walk state */ thread->walk_state_list = walk_state->next; @@ -778,6 +782,7 @@ acpi_ds_init_aml_walk(struct acpi_walk_state *walk_state, } if (parser_state->start_node) { + /* Push start scope on scope stack and make it current */ status = -- cgit v1.2.3