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authorBob Moore <robert.moore@intel.com>2010-04-27 11:32:28 +0800
committerLen Brown <len.brown@intel.com>2010-05-06 03:05:54 -0400
commit186c307f008d2a53961cd970aaf7cb9c33e79cb1 (patch)
treed0f6af298f4012aafed58c27b8db498ddd9ed7ba /drivers/acpi
parentb9ee2043096b02e5da8c62f9a8a8f2e172b3606b (diff)
ACPICA: Add GPE support for dynamically loaded ACPI tables
For all GPEs, including FADT-based and GPE Block Devices, execute any _PRW methods in the new table, and process any _Lxx/_Exx GPE methods in the new table. Any runtime GPE that is referred to by an _Lxx/_Exx method in the new table is immediately enabled. ACPICA BZ 833. http://www.acpica.org/bugzilla/show_bug.cgi?id=833 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/acpica/acevents.h2
-rw-r--r--drivers/acpi/acpica/aclocal.h4
-rw-r--r--drivers/acpi/acpica/evgpe.c2
-rw-r--r--drivers/acpi/acpica/evgpeblk.c316
-rw-r--r--drivers/acpi/acpica/exconfig.c21
5 files changed, 298 insertions, 47 deletions
diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
index 5e094a28cf5..0f83dc46bd9 100644
--- a/drivers/acpi/acpica/acevents.h
+++ b/drivers/acpi/acpica/acevents.h
@@ -110,6 +110,8 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
u32 interrupt_number,
struct acpi_gpe_block_info **return_gpe_block);
+void acpi_ev_update_gpes(acpi_owner_id table_owner_id);
+
acpi_status
acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
struct acpi_gpe_block_info *gpe_block);
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 0886a3dfe13..147a7e6bd38 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -470,6 +470,10 @@ struct acpi_gpe_xrupt_info {
struct acpi_gpe_walk_info {
struct acpi_namespace_node *gpe_device;
struct acpi_gpe_block_info *gpe_block;
+ u16 count;
+ acpi_owner_id owner_id;
+ u8 enable_this_gpe;
+ u8 execute_by_owner_id;
};
struct acpi_gpe_device_info {
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index deb26f4c662..a221ad40416 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -265,7 +265,7 @@ struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
ACPI_FUNCTION_ENTRY();
- /* A NULL gpe_block means use the FADT-defined GPE block(s) */
+ /* A NULL gpe_device means use the FADT-defined GPE block(s) */
if (!gpe_device) {
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index 85ded1f2540..3341d1dfe78 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -45,6 +45,7 @@
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"
+#include "acinterp.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME("evgpeblk")
@@ -236,7 +237,9 @@ acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
* DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
* control method under the _GPE portion of the namespace.
* Extract the name and GPE type from the object, saving this
- * information for quick lookup during GPE dispatch
+ * information for quick lookup during GPE dispatch. Allows a
+ * per-owner_id evaluation if execute_by_owner_id is TRUE in the
+ * walk_info parameter block.
*
* The name of each GPE control method is of the form:
* "_Lxx" or "_Exx", where:
@@ -244,21 +247,36 @@ acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
* E - means that the GPE is edge triggered
* xx - is the GPE number [in HEX]
*
+ * If walk_info->execute_by_owner_id is TRUE, we only execute examine GPE methods
+ * with that owner.
+ * If walk_info->enable_this_gpe is TRUE, the GPE that is referred to by a GPE
+ * method is immediately enabled (Used for Load/load_table operators)
+ *
******************************************************************************/
static acpi_status
acpi_ev_match_gpe_method(acpi_handle obj_handle,
- u32 level, void *obj_desc, void **return_value)
+ u32 level, void *context, void **return_value)
{
struct acpi_namespace_node *method_node =
ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
- struct acpi_gpe_block_info *gpe_block = (void *)obj_desc;
+ struct acpi_gpe_walk_info *walk_info =
+ ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
struct acpi_gpe_event_info *gpe_event_info;
+ struct acpi_namespace_node *gpe_device;
+ acpi_status status;
u32 gpe_number;
char name[ACPI_NAME_SIZE + 1];
u8 type;
- ACPI_FUNCTION_TRACE(ev_save_method_info);
+ ACPI_FUNCTION_TRACE(ev_match_gpe_method);
+
+ /* Check if requested owner_id matches this owner_id */
+
+ if ((walk_info->execute_by_owner_id) &&
+ (method_node->owner_id != walk_info->owner_id)) {
+ return_ACPI_STATUS(AE_OK);
+ }
/*
* Match and decode the _Lxx and _Exx GPE method names
@@ -314,7 +332,8 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
/* Ensure that we have a valid GPE number for this GPE block */
- gpe_event_info = acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
+ gpe_event_info =
+ acpi_ev_low_get_gpe_info(gpe_number, walk_info->gpe_block);
if (!gpe_event_info) {
/*
* This gpe_number is not valid for this GPE block, just ignore it.
@@ -324,13 +343,64 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
return_ACPI_STATUS(AE_OK);
}
+ if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+ ACPI_GPE_DISPATCH_HANDLER) {
+
+ /* If there is already a handler, ignore this GPE method */
+
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+ ACPI_GPE_DISPATCH_METHOD) {
+ /*
+ * If there is already a method, ignore this method. But check
+ * for a type mismatch (if both the _Lxx AND _Exx exist)
+ */
+ if (type != (gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
+ ACPI_ERROR((AE_INFO,
+ "For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
+ gpe_number, gpe_number, gpe_number));
+ }
+ return_ACPI_STATUS(AE_OK);
+ }
+
/*
* Add the GPE information from above to the gpe_event_info block for
* use during dispatch of this GPE.
*/
- gpe_event_info->flags = (u8)(type | ACPI_GPE_DISPATCH_METHOD);
+ gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_METHOD);
gpe_event_info->dispatch.method_node = method_node;
+ /*
+ * Enable this GPE if requested. This only happens when during the
+ * execution of a Load or load_table operator. We have found a new
+ * GPE method and want to immediately enable the GPE if it is a
+ * runtime GPE.
+ */
+ if (walk_info->enable_this_gpe) {
+
+ /* Ignore GPEs that can wake the system */
+
+ if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE) ||
+ !acpi_gbl_leave_wake_gpes_disabled) {
+ walk_info->count++;
+ gpe_device = walk_info->gpe_device;
+
+ if (gpe_device == acpi_gbl_fadt_gpe_device) {
+ gpe_device = NULL;
+ }
+
+ status = acpi_enable_gpe(gpe_device, gpe_number,
+ ACPI_GPE_TYPE_RUNTIME);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Could not enable GPE 0x%02X",
+ gpe_number));
+ }
+ }
+ }
+
ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
"Registered GPE method %s as GPE number 0x%.2X\n",
name, gpe_number));
@@ -348,18 +418,27 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
*
* DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
* Device. Run the _PRW method. If present, extract the GPE
- * number and mark the GPE as a CAN_WAKE GPE.
+ * number and mark the GPE as a CAN_WAKE GPE. Allows a
+ * per-owner_id execution if execute_by_owner_id is TRUE in the
+ * walk_info parameter block.
+ *
+ * If walk_info->execute_by_owner_id is TRUE, we only execute _PRWs with that
+ * owner.
+ * If walk_info->gpe_device is NULL, we execute every _PRW found. Otherwise,
+ * we only execute _PRWs that refer to the input gpe_device.
*
******************************************************************************/
static acpi_status
acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
- u32 level, void *info, void **return_value)
+ u32 level, void *context, void **return_value)
{
- struct acpi_gpe_walk_info *gpe_info = (void *)info;
+ struct acpi_gpe_walk_info *walk_info =
+ ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
struct acpi_namespace_node *gpe_device;
struct acpi_gpe_block_info *gpe_block;
struct acpi_namespace_node *target_gpe_device;
+ struct acpi_namespace_node *prw_node;
struct acpi_gpe_event_info *gpe_event_info;
union acpi_operand_object *pkg_desc;
union acpi_operand_object *obj_desc;
@@ -370,12 +449,24 @@ acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
/* Check for a _PRW method under this device */
- status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW,
- ACPI_BTYPE_PACKAGE, &pkg_desc);
+ status = acpi_ns_get_node(obj_handle, METHOD_NAME__PRW,
+ ACPI_NS_NO_UPSEARCH, &prw_node);
if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(AE_OK);
+ }
- /* Ignore all errors from _PRW, we don't want to abort the walk */
+ /* Check if requested owner_id matches this owner_id */
+ if ((walk_info->execute_by_owner_id) &&
+ (prw_node->owner_id != walk_info->owner_id)) {
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /* Execute the _PRW */
+
+ status = acpi_ut_evaluate_object(prw_node, NULL,
+ ACPI_BTYPE_PACKAGE, &pkg_desc);
+ if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(AE_OK);
}
@@ -387,12 +478,12 @@ acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
/* Extract pointers from the input context */
- gpe_device = gpe_info->gpe_device;
- gpe_block = gpe_info->gpe_block;
+ gpe_device = walk_info->gpe_device;
+ gpe_block = walk_info->gpe_block;
/*
- * The _PRW object must return a package, we are only interested in the
- * first element
+ * The _PRW object must return a package, we are only interested
+ * in the first element
*/
obj_desc = pkg_desc->package.elements[0];
@@ -400,7 +491,10 @@ acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
/* Use FADT-defined GPE device (from definition of _PRW) */
- target_gpe_device = acpi_gbl_fadt_gpe_device;
+ target_gpe_device = NULL;
+ if (gpe_device) {
+ target_gpe_device = acpi_gbl_fadt_gpe_device;
+ }
/* Integer is the GPE number in the FADT described GPE blocks */
@@ -428,23 +522,38 @@ acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
goto cleanup;
}
- /*
- * Is this GPE within this block?
- *
- * TRUE if and only if these conditions are true:
- * 1) The GPE devices match.
- * 2) The GPE index(number) is within the range of the Gpe Block
- * associated with the GPE device.
- */
- if (gpe_device != target_gpe_device) {
- goto cleanup;
+ /* Get the gpe_event_info for this GPE */
+
+ if (gpe_device) {
+ /*
+ * Is this GPE within this block?
+ *
+ * TRUE if and only if these conditions are true:
+ * 1) The GPE devices match.
+ * 2) The GPE index(number) is within the range of the Gpe Block
+ * associated with the GPE device.
+ */
+ if (gpe_device != target_gpe_device) {
+ goto cleanup;
+ }
+
+ gpe_event_info =
+ acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
+ } else {
+ /* gpe_device is NULL, just match the target_device and gpe_number */
+
+ gpe_event_info =
+ acpi_ev_get_gpe_event_info(target_gpe_device, gpe_number);
}
- gpe_event_info = acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
if (gpe_event_info) {
- /* This GPE can wake the system */
+ if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
+
+ /* This GPE can wake the system */
- gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
+ gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
+ walk_info->count++;
+ }
}
cleanup:
@@ -874,6 +983,7 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
{
acpi_status status;
struct acpi_gpe_block_info *gpe_block;
+ struct acpi_gpe_walk_info walk_info;
ACPI_FUNCTION_TRACE(ev_create_gpe_block);
@@ -916,12 +1026,17 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
return_ACPI_STATUS(status);
}
- /* Find all GPE methods (_Lxx, _Exx) for this block */
+ /* Find all GPE methods (_Lxx or_Exx) for this block */
+
+ walk_info.gpe_block = gpe_block;
+ walk_info.gpe_device = gpe_device;
+ walk_info.enable_this_gpe = FALSE;
+ walk_info.execute_by_owner_id = FALSE;
status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device,
ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
acpi_ev_match_gpe_method, NULL,
- gpe_block, NULL);
+ &walk_info, NULL);
/* Return the new block */
@@ -945,6 +1060,123 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
/*******************************************************************************
*
+ * FUNCTION: acpi_ev_update_gpes
+ *
+ * PARAMETERS: table_owner_id - ID of the newly-loaded ACPI table
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
+ * result of a Load() or load_table() operation. If new GPE
+ * methods have been installed, register the new methods and
+ * enable and runtime GPEs that are associated with them. Also,
+ * run any newly loaded _PRW methods in order to discover any
+ * new CAN_WAKE GPEs.
+ *
+ ******************************************************************************/
+
+void acpi_ev_update_gpes(acpi_owner_id table_owner_id)
+{
+ struct acpi_gpe_xrupt_info *gpe_xrupt_info;
+ struct acpi_gpe_block_info *gpe_block;
+ struct acpi_gpe_walk_info walk_info;
+ acpi_status status = AE_OK;
+ u32 new_wake_gpe_count = 0;
+
+ /* We will examine only _PRW/_Lxx/_Exx methods owned by this table */
+
+ walk_info.owner_id = table_owner_id;
+ walk_info.execute_by_owner_id = TRUE;
+ walk_info.count = 0;
+
+ if (acpi_gbl_leave_wake_gpes_disabled) {
+ /*
+ * 1) Run any newly-loaded _PRW methods to find any GPEs that
+ * can now be marked as CAN_WAKE GPEs. Note: We must run the
+ * _PRW methods before we process the _Lxx/_Exx methods because
+ * we will enable all runtime GPEs associated with the new
+ * _Lxx/_Exx methods at the time we process those methods.
+ *
+ * Unlock interpreter so that we can run the _PRW methods.
+ */
+ walk_info.gpe_block = NULL;
+ walk_info.gpe_device = NULL;
+
+ acpi_ex_exit_interpreter();
+
+ status =
+ acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX,
+ ACPI_NS_WALK_NO_UNLOCK,
+ acpi_ev_match_prw_and_gpe, NULL,
+ &walk_info, NULL);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "While executing _PRW methods"));
+ }
+
+ acpi_ex_enter_interpreter();
+ new_wake_gpe_count = walk_info.count;
+ }
+
+ /*
+ * 2) Find any _Lxx/_Exx GPE methods that have just been loaded.
+ *
+ * Any GPEs that correspond to new _Lxx/_Exx methods and are not
+ * marked as CAN_WAKE are immediately enabled.
+ *
+ * Examine the namespace underneath each gpe_device within the
+ * gpe_block lists.
+ */
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return;
+ }
+
+ walk_info.count = 0;
+ walk_info.enable_this_gpe = TRUE;
+
+ /* Walk the interrupt level descriptor list */
+
+ gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
+ while (gpe_xrupt_info) {
+
+ /* Walk all Gpe Blocks attached to this interrupt level */
+
+ gpe_block = gpe_xrupt_info->gpe_block_list_head;
+ while (gpe_block) {
+ walk_info.gpe_block = gpe_block;
+ walk_info.gpe_device = gpe_block->node;
+
+ status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD,
+ walk_info.gpe_device,
+ ACPI_UINT32_MAX,
+ ACPI_NS_WALK_NO_UNLOCK,
+ acpi_ev_match_gpe_method,
+ NULL, &walk_info, NULL);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "While decoding _Lxx/_Exx methods"));
+ }
+
+ gpe_block = gpe_block->next;
+ }
+
+ gpe_xrupt_info = gpe_xrupt_info->next;
+ }
+
+ if (walk_info.count || new_wake_gpe_count) {
+ ACPI_INFO((AE_INFO,
+ "Enabled %u new runtime GPEs, added %u new wakeup GPEs",
+ walk_info.count, new_wake_gpe_count));
+ }
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return;
+}
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_ev_initialize_gpe_block
*
* PARAMETERS: gpe_device - Handle to the parent GPE block
@@ -965,7 +1197,7 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
{
acpi_status status;
struct acpi_gpe_event_info *gpe_event_info;
- struct acpi_gpe_walk_info gpe_info;
+ struct acpi_gpe_walk_info walk_info;
u32 wake_gpe_count;
u32 gpe_enabled_count;
u32 gpe_index;
@@ -992,13 +1224,15 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
* definition a wake GPE and will not be enabled while the machine
* is running.
*/
- gpe_info.gpe_block = gpe_block;
- gpe_info.gpe_device = gpe_device;
+ walk_info.gpe_block = gpe_block;
+ walk_info.gpe_device = gpe_device;
+ walk_info.execute_by_owner_id = FALSE;
- status = acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+ status =
+ acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK,
acpi_ev_match_prw_and_gpe, NULL,
- &gpe_info, NULL);
+ &walk_info, NULL);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"While executing _PRW methods"));
@@ -1054,9 +1288,11 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
}
}
- ACPI_DEBUG_PRINT((ACPI_DB_INIT,
- "Found %u Wake, Enabled %u Runtime GPEs in this block\n",
- wake_gpe_count, gpe_enabled_count));
+ if (gpe_enabled_count || wake_gpe_count) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INIT,
+ "Enabled %u Runtime GPEs, added %u Wake GPEs in this block\n",
+ gpe_enabled_count, wake_gpe_count));
+ }
return_ACPI_STATUS(AE_OK);
}
diff --git a/drivers/acpi/acpica/exconfig.c b/drivers/acpi/acpica/exconfig.c
index 7e8b3bedc37..008621c5ad8 100644
--- a/drivers/acpi/acpica/exconfig.c
+++ b/drivers/acpi/acpica/exconfig.c
@@ -82,8 +82,9 @@ acpi_ex_add_table(u32 table_index,
struct acpi_namespace_node *parent_node,
union acpi_operand_object **ddb_handle)
{
- acpi_status status;
union acpi_operand_object *obj_desc;
+ acpi_status status;
+ acpi_owner_id owner_id;
ACPI_FUNCTION_TRACE(ex_add_table);
@@ -119,7 +120,14 @@ acpi_ex_add_table(u32 table_index,
acpi_ns_exec_module_code_list();
acpi_ex_enter_interpreter();
- return_ACPI_STATUS(status);
+ /* Update GPEs for any new _PRW or _Lxx/_Exx methods. Ignore errors */
+
+ status = acpi_tb_get_owner_id(table_index, &owner_id);
+ if (ACPI_SUCCESS(status)) {
+ acpi_ev_update_gpes(owner_id);
+ }
+
+ return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
@@ -248,10 +256,8 @@ acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
status = acpi_get_table_by_index(table_index, &table);
if (ACPI_SUCCESS(status)) {
- ACPI_INFO((AE_INFO,
- "Dynamic OEM Table Load - [%.4s] OemId [%.6s] OemTableId [%.8s]",
- table->signature, table->oem_id,
- table->oem_table_id));
+ ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
+ acpi_tb_print_table_header(0, table);
}
/* Invoke table handler if present */
@@ -525,6 +531,9 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
return_ACPI_STATUS(status);
}
+ ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
+ acpi_tb_print_table_header(0, table_desc.pointer);
+
/* Remove the reference by added by acpi_ex_store above */
acpi_ut_remove_reference(ddb_handle);