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authorBob Moore <robert.moore@intel.com>2006-05-12 17:12:00 -0400
committerLen Brown <len.brown@intel.com>2006-06-14 02:34:48 -0400
commit958dd242b691f64ab4632b4903dbb1e16fee8269 (patch)
treeddf4932fb4e3023dd0d1914571f17f2e3b03978d /drivers/acpi/dispatcher
parentb229cf92eee616c7cb5ad8cdb35a19b119f00bc8 (diff)
ACPI: ACPICA 20060512
Replaced the acpi_os_queue_for_execution() with a new interface named acpi_os_execute(). The major difference is that the new interface does not have a Priority parameter, this appeared to be useless and has been replaced by a Type parameter. The Type tells the OS what type of execution is being requested, such as global lock handler, notify handler, GPE handler, etc. This allows the host to queue and execute the request as appropriate for the request type, possibly using different work queues and different priorities for the various request types. This enables fixes for multithreading deadlock problems such as http://bugzilla.kernel.org/show_bug.cgi?id=5534 (Alexey Starikovskiy and Bob Moore) Fixed a possible memory leak associated with the support for the so-called "implicit return" ACPI extension. Reported by FreeBSD (Fiodor Suietov) http://bugzilla.kernel.org/show_bug.cgi?id=6514 Fixed a problem with the Load() operator where a table load from an operation region could overwrite an internal table buffer by up to 7 bytes and cause alignment faults on IPF systems. (With assistance from Luming Yu) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/dispatcher')
-rw-r--r--drivers/acpi/dispatcher/dsmethod.c23
-rw-r--r--drivers/acpi/dispatcher/dsmthdat.c6
-rw-r--r--drivers/acpi/dispatcher/dswload.c41
3 files changed, 56 insertions, 14 deletions
diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c
index 651f2b68531..e348db0e541 100644
--- a/drivers/acpi/dispatcher/dsmethod.c
+++ b/drivers/acpi/dispatcher/dsmethod.c
@@ -385,6 +385,7 @@ acpi_ds_restart_control_method(struct acpi_walk_state *walk_state,
union acpi_operand_object *return_desc)
{
acpi_status status;
+ int same_as_implicit_return;
ACPI_FUNCTION_TRACE_PTR(ds_restart_control_method, walk_state);
@@ -402,6 +403,11 @@ acpi_ds_restart_control_method(struct acpi_walk_state *walk_state,
if (return_desc) {
+ /* Is the implicit return object the same as the return desc? */
+
+ same_as_implicit_return =
+ (walk_state->implicit_return_obj == return_desc);
+
/* Are we actually going to use the return value? */
if (walk_state->return_used) {
@@ -422,18 +428,23 @@ acpi_ds_restart_control_method(struct acpi_walk_state *walk_state,
}
/*
- * The following code is the
- * optional support for a so-called "implicit return". Some AML code
- * assumes that the last value of the method is "implicitly" returned
- * to the caller. Just save the last result as the return value.
+ * The following code is the optional support for the so-called
+ * "implicit return". Some AML code assumes that the last value of the
+ * method is "implicitly" returned to the caller, in the absence of an
+ * explicit return value.
+ *
+ * Just save the last result of the method as the return value.
+ *
* NOTE: this is optional because the ASL language does not actually
* support this behavior.
*/
else if (!acpi_ds_do_implicit_return
- (return_desc, walk_state, FALSE)) {
+ (return_desc, walk_state, FALSE)
+ || same_as_implicit_return) {
/*
* Delete the return value if it will not be used by the
- * calling method
+ * calling method or remove one reference if the explicit return
+ * is the same as the implicit return value.
*/
acpi_ut_remove_reference(return_desc);
}
diff --git a/drivers/acpi/dispatcher/dsmthdat.c b/drivers/acpi/dispatcher/dsmthdat.c
index b47c54fad86..459160ff905 100644
--- a/drivers/acpi/dispatcher/dsmthdat.c
+++ b/drivers/acpi/dispatcher/dsmthdat.c
@@ -336,7 +336,7 @@ acpi_ds_method_data_set_value(u16 opcode,
* Increment ref count so object can't be deleted while installed.
* NOTE: We do not copy the object in order to preserve the call by
* reference semantics of ACPI Control Method invocation.
- * (See ACPI specification 2.0_c)
+ * (See ACPI Specification 2.0_c)
*/
acpi_ut_add_reference(object);
@@ -351,7 +351,7 @@ acpi_ds_method_data_set_value(u16 opcode,
* FUNCTION: acpi_ds_method_data_get_value
*
* PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP
- * Index - which local_var or argument to get
+ * Index - Which local_var or argument to get
* walk_state - Current walk state object
* dest_desc - Where Arg or Local value is returned
*
@@ -459,7 +459,7 @@ acpi_ds_method_data_get_value(u16 opcode,
* FUNCTION: acpi_ds_method_data_delete_value
*
* PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP
- * Index - which local_var or argument to delete
+ * Index - Which local_var or argument to delete
* walk_state - Current walk state object
*
* RETURN: None
diff --git a/drivers/acpi/dispatcher/dswload.c b/drivers/acpi/dispatcher/dswload.c
index a8deb700cf3..35074399c61 100644
--- a/drivers/acpi/dispatcher/dswload.c
+++ b/drivers/acpi/dispatcher/dswload.c
@@ -178,12 +178,12 @@ acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
* Target of Scope() not found. Generate an External for it, and
* insert the name into the namespace.
*/
- acpi_dm_add_to_external_list(path);
+ acpi_dm_add_to_external_list(path, ACPI_TYPE_DEVICE, 0);
status =
acpi_ns_lookup(walk_state->scope_info, path,
object_type, ACPI_IMODE_LOAD_PASS1,
ACPI_NS_SEARCH_PARENT, walk_state,
- &(node));
+ &node);
}
#endif
if (ACPI_FAILURE(status)) {
@@ -301,10 +301,41 @@ acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
status =
acpi_ns_lookup(walk_state->scope_info, path, object_type,
ACPI_IMODE_LOAD_PASS1, flags, walk_state,
- &(node));
+ &node);
if (ACPI_FAILURE(status)) {
- ACPI_ERROR_NAMESPACE(path, status);
- return_ACPI_STATUS(status);
+ if (status == AE_ALREADY_EXISTS) {
+
+ /* The name already exists in this scope */
+
+ if (node->flags & ANOBJ_IS_EXTERNAL) {
+ /*
+ * Allow one create on an object or segment that was
+ * previously declared External
+ */
+ node->flags &= ~ANOBJ_IS_EXTERNAL;
+ node->type = (u8) object_type;
+
+ /* Just retyped a node, probably will need to open a scope */
+
+ if (acpi_ns_opens_scope(object_type)) {
+ status =
+ acpi_ds_scope_stack_push
+ (node, object_type,
+ walk_state);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS
+ (status);
+ }
+ }
+ status = AE_OK;
+ }
+ }
+
+ if (ACPI_FAILURE(status)) {
+
+ ACPI_ERROR_NAMESPACE(path, status);
+ return_ACPI_STATUS(status);
+ }
}
break;
}