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path: root/drivers/acpi/dispatcher
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Diffstat (limited to 'drivers/acpi/dispatcher')
-rw-r--r--drivers/acpi/dispatcher/dsmethod.c69
-rw-r--r--drivers/acpi/dispatcher/dswload.c5
2 files changed, 43 insertions, 31 deletions
diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c
index 77fcfc3070db..36c1ca0b9adb 100644
--- a/drivers/acpi/dispatcher/dsmethod.c
+++ b/drivers/acpi/dispatcher/dsmethod.c
@@ -207,6 +207,13 @@ acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
return_ACPI_STATUS(AE_NULL_ENTRY);
}
+ /* Prevent wraparound of thread count */
+
+ if (obj_desc->method.thread_count == ACPI_UINT8_MAX) {
+ ACPI_REPORT_ERROR(("Method reached maximum reentrancy limit (255)\n"));
+ return_ACPI_STATUS(AE_AML_METHOD_LIMIT);
+ }
+
/*
* If there is a concurrency limit on this method, we need to
* obtain a unit from the method semaphore.
@@ -237,6 +244,18 @@ acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
}
/*
+ * Allocate an Owner ID for this method, only if this is the first thread
+ * to begin concurrent execution. We only need one owner_id, even if the
+ * method is invoked recursively.
+ */
+ if (!obj_desc->method.owner_id) {
+ status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+ }
+
+ /*
* Increment the method parse tree thread count since it has been
* reentered one more time (even if it is the same thread)
*/
@@ -289,11 +308,6 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
return_ACPI_STATUS(AE_NULL_OBJECT);
}
- status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
/* Init for new method, wait on concurrency semaphore */
status = acpi_ds_begin_method_execution(method_node, obj_desc,
@@ -345,9 +359,8 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
}
/*
* The resolved arguments were put on the previous walk state's operand
- * stack. Operands on the previous walk state stack always
- * start at index 0.
- * Null terminate the list of arguments
+ * stack. Operands on the previous walk state stack always
+ * start at index 0. Also, null terminate the list of arguments
*/
this_walk_state->operands[this_walk_state->num_operands] = NULL;
@@ -380,21 +393,20 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
status = obj_desc->method.implementation(next_walk_state);
- return_ACPI_STATUS(status);
}
- return_ACPI_STATUS(AE_OK);
-
- /* On error, we must delete the new walk state */
+ return_ACPI_STATUS(status);
cleanup:
- acpi_ut_release_owner_id(&obj_desc->method.owner_id);
- if (next_walk_state && (next_walk_state->method_desc)) {
- /* Decrement the thread count on the method parse tree */
+ /* Decrement the thread count on the method parse tree */
+ if (next_walk_state && (next_walk_state->method_desc)) {
next_walk_state->method_desc->method.thread_count--;
}
- (void)acpi_ds_terminate_control_method(next_walk_state);
+
+ /* On error, we must delete the new walk state */
+
+ acpi_ds_terminate_control_method(next_walk_state);
acpi_ds_delete_walk_state(next_walk_state);
return_ACPI_STATUS(status);
}
@@ -479,7 +491,7 @@ acpi_ds_restart_control_method(struct acpi_walk_state *walk_state,
*
* PARAMETERS: walk_state - State of the method
*
- * RETURN: Status
+ * RETURN: None
*
* DESCRIPTION: Terminate a control method. Delete everything that the method
* created, delete all locals and arguments, and delete the parse
@@ -487,7 +499,7 @@ acpi_ds_restart_control_method(struct acpi_walk_state *walk_state,
*
******************************************************************************/
-acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
+void acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
{
union acpi_operand_object *obj_desc;
struct acpi_namespace_node *method_node;
@@ -496,14 +508,14 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
ACPI_FUNCTION_TRACE_PTR("ds_terminate_control_method", walk_state);
if (!walk_state) {
- return (AE_BAD_PARAMETER);
+ return_VOID;
}
/* The current method object was saved in the walk state */
obj_desc = walk_state->method_desc;
if (!obj_desc) {
- return_ACPI_STATUS(AE_OK);
+ return_VOID;
}
/* Delete all arguments and locals */
@@ -517,7 +529,7 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
*/
status = acpi_ut_acquire_mutex(ACPI_MTX_PARSER);
if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
+ return_VOID;
}
/* Signal completion of the execution of this method if necessary */
@@ -528,7 +540,6 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
semaphore, 1);
if (ACPI_FAILURE(status)) {
ACPI_REPORT_ERROR(("Could not signal method semaphore\n"));
- status = AE_OK;
/* Ignore error and continue cleanup */
}
@@ -539,9 +550,8 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
"*** Not deleting method namespace, there are still %d threads\n",
walk_state->method_desc->method.
thread_count));
- }
+ } else { /* This is the last executing thread */
- if (!walk_state->method_desc->method.thread_count) {
/*
* Support to dynamically change a method from not_serialized to
* Serialized if it appears that the method is written foolishly and
@@ -574,7 +584,7 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
*/
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
+ goto exit;
}
if (method_node->child) {
@@ -590,12 +600,9 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
acpi_ut_release_owner_id(&walk_state->method_desc->method.
owner_id);
-
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
}
- status = acpi_ut_release_mutex(ACPI_MTX_PARSER);
- return_ACPI_STATUS(status);
+ exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_PARSER);
+ return_VOID;
}
diff --git a/drivers/acpi/dispatcher/dswload.c b/drivers/acpi/dispatcher/dswload.c
index 362bbcfc1718..411731261c29 100644
--- a/drivers/acpi/dispatcher/dswload.c
+++ b/drivers/acpi/dispatcher/dswload.c
@@ -486,8 +486,10 @@ acpi_ds_load2_begin_op(struct acpi_walk_state * walk_state,
if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
(walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
(!(walk_state->op_info->flags & AML_NAMED))) {
+#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
(walk_state->op_info->class == AML_CLASS_CONTROL)) {
+
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"Begin/EXEC: %s (fl %8.8X)\n",
walk_state->op_info->name,
@@ -499,6 +501,7 @@ acpi_ds_load2_begin_op(struct acpi_walk_state * walk_state,
acpi_ds_exec_begin_op(walk_state, out_op);
return_ACPI_STATUS(status);
}
+#endif
return_ACPI_STATUS(AE_OK);
}
@@ -731,6 +734,7 @@ acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
#ifndef ACPI_NO_METHOD_EXECUTION
+#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
/* No namespace object. Executable opcode? */
if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
@@ -746,6 +750,7 @@ acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
return_ACPI_STATUS(status);
}
#endif
+#endif
return_ACPI_STATUS(AE_OK);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 13:03:50 +0000