xref: /openbmc/linux/drivers/acpi/acpica/nsinit.c (revision 612c2932)
1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3  *
4  * Module Name: nsinit - namespace initialization
5  *
6  * Copyright (C) 2000 - 2023, Intel Corp.
7  *
8  *****************************************************************************/
9 
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acnamesp.h"
13 #include "acdispat.h"
14 #include "acinterp.h"
15 #include "acevents.h"
16 
17 #define _COMPONENT          ACPI_NAMESPACE
18 ACPI_MODULE_NAME("nsinit")
19 
20 /* Local prototypes */
21 static acpi_status
22 acpi_ns_init_one_object(acpi_handle obj_handle,
23 			u32 level, void *context, void **return_value);
24 
25 static acpi_status
26 acpi_ns_init_one_device(acpi_handle obj_handle,
27 			u32 nesting_level, void *context, void **return_value);
28 
29 static acpi_status
30 acpi_ns_find_ini_methods(acpi_handle obj_handle,
31 			 u32 nesting_level, void *context, void **return_value);
32 
33 /*******************************************************************************
34  *
35  * FUNCTION:    acpi_ns_initialize_objects
36  *
37  * PARAMETERS:  None
38  *
39  * RETURN:      Status
40  *
41  * DESCRIPTION: Walk the entire namespace and perform any necessary
42  *              initialization on the objects found therein
43  *
44  ******************************************************************************/
45 
acpi_ns_initialize_objects(void)46 acpi_status acpi_ns_initialize_objects(void)
47 {
48 	acpi_status status;
49 	struct acpi_init_walk_info info;
50 
51 	ACPI_FUNCTION_TRACE(ns_initialize_objects);
52 
53 	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
54 			  "[Init] Completing Initialization of ACPI Objects\n"));
55 	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
56 			  "**** Starting initialization of namespace objects ****\n"));
57 	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
58 			      "Final data object initialization: "));
59 
60 	/* Clear the info block */
61 
62 	memset(&info, 0, sizeof(struct acpi_init_walk_info));
63 
64 	/* Walk entire namespace from the supplied root */
65 
66 	/*
67 	 * TBD: will become ACPI_TYPE_PACKAGE as this type object
68 	 * is now the only one that supports deferred initialization
69 	 * (forward references).
70 	 */
71 	status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
72 				     ACPI_UINT32_MAX, acpi_ns_init_one_object,
73 				     NULL, &info, NULL);
74 	if (ACPI_FAILURE(status)) {
75 		ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
76 	}
77 
78 	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
79 			      "Namespace contains %u (0x%X) objects\n",
80 			      info.object_count, info.object_count));
81 
82 	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
83 			  "%u Control Methods found\n%u Op Regions found\n",
84 			  info.method_count, info.op_region_count));
85 
86 	return_ACPI_STATUS(AE_OK);
87 }
88 
89 /*******************************************************************************
90  *
91  * FUNCTION:    acpi_ns_initialize_devices
92  *
93  * PARAMETERS:  None
94  *
95  * RETURN:      acpi_status
96  *
97  * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
98  *              This means running _INI on all present devices.
99  *
100  *              Note: We install PCI config space handler on region access,
101  *              not here.
102  *
103  ******************************************************************************/
104 
acpi_ns_initialize_devices(u32 flags)105 acpi_status acpi_ns_initialize_devices(u32 flags)
106 {
107 	acpi_status status = AE_OK;
108 	struct acpi_device_walk_info info;
109 	acpi_handle handle;
110 
111 	ACPI_FUNCTION_TRACE(ns_initialize_devices);
112 
113 	if (!(flags & ACPI_NO_DEVICE_INIT)) {
114 		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
115 				  "[Init] Initializing ACPI Devices\n"));
116 
117 		/* Init counters */
118 
119 		info.device_count = 0;
120 		info.num_STA = 0;
121 		info.num_INI = 0;
122 
123 		ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
124 				      "Initializing Device/Processor/Thermal objects "
125 				      "and executing _INI/_STA methods:\n"));
126 
127 		/* Tree analysis: find all subtrees that contain _INI methods */
128 
129 		status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
130 						ACPI_UINT32_MAX, FALSE,
131 						acpi_ns_find_ini_methods, NULL,
132 						&info, NULL);
133 		if (ACPI_FAILURE(status)) {
134 			goto error_exit;
135 		}
136 
137 		/* Allocate the evaluation information block */
138 
139 		info.evaluate_info =
140 		    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
141 		if (!info.evaluate_info) {
142 			status = AE_NO_MEMORY;
143 			goto error_exit;
144 		}
145 
146 		/*
147 		 * Execute the "global" _INI method that may appear at the root.
148 		 * This support is provided for Windows compatibility (Vista+) and
149 		 * is not part of the ACPI specification.
150 		 */
151 		info.evaluate_info->prefix_node = acpi_gbl_root_node;
152 		info.evaluate_info->relative_pathname = METHOD_NAME__INI;
153 		info.evaluate_info->parameters = NULL;
154 		info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
155 
156 		status = acpi_ns_evaluate(info.evaluate_info);
157 		if (ACPI_SUCCESS(status)) {
158 			info.num_INI++;
159 		}
160 
161 		/*
162 		 * Execute \_SB._INI.
163 		 * There appears to be a strict order requirement for \_SB._INI,
164 		 * which should be evaluated before any _REG evaluations.
165 		 */
166 		status = acpi_get_handle(NULL, "\\_SB", &handle);
167 		if (ACPI_SUCCESS(status)) {
168 			memset(info.evaluate_info, 0,
169 			       sizeof(struct acpi_evaluate_info));
170 			info.evaluate_info->prefix_node = handle;
171 			info.evaluate_info->relative_pathname =
172 			    METHOD_NAME__INI;
173 			info.evaluate_info->parameters = NULL;
174 			info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
175 
176 			status = acpi_ns_evaluate(info.evaluate_info);
177 			if (ACPI_SUCCESS(status)) {
178 				info.num_INI++;
179 			}
180 		}
181 	}
182 
183 	/*
184 	 * Run all _REG methods
185 	 *
186 	 * Note: Any objects accessed by the _REG methods will be automatically
187 	 * initialized, even if they contain executable AML (see the call to
188 	 * acpi_ns_initialize_objects below).
189 	 *
190 	 * Note: According to the ACPI specification, we actually needn't execute
191 	 * _REG for system_memory/system_io operation regions, but for PCI_Config
192 	 * operation regions, it is required to evaluate _REG for those on a PCI
193 	 * root bus that doesn't contain _BBN object. So this code is kept here
194 	 * in order not to break things.
195 	 */
196 	if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
197 		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
198 				  "[Init] Executing _REG OpRegion methods\n"));
199 
200 		status = acpi_ev_initialize_op_regions();
201 		if (ACPI_FAILURE(status)) {
202 			goto error_exit;
203 		}
204 	}
205 
206 	if (!(flags & ACPI_NO_DEVICE_INIT)) {
207 
208 		/* Walk namespace to execute all _INIs on present devices */
209 
210 		status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
211 						ACPI_UINT32_MAX, FALSE,
212 						acpi_ns_init_one_device, NULL,
213 						&info, NULL);
214 
215 		/*
216 		 * Any _OSI requests should be completed by now. If the BIOS has
217 		 * requested any Windows OSI strings, we will always truncate
218 		 * I/O addresses to 16 bits -- for Windows compatibility.
219 		 */
220 		if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
221 			acpi_gbl_truncate_io_addresses = TRUE;
222 		}
223 
224 		ACPI_FREE(info.evaluate_info);
225 		if (ACPI_FAILURE(status)) {
226 			goto error_exit;
227 		}
228 
229 		ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
230 				      "    Executed %u _INI methods requiring %u _STA executions "
231 				      "(examined %u objects)\n",
232 				      info.num_INI, info.num_STA,
233 				      info.device_count));
234 	}
235 
236 	return_ACPI_STATUS(status);
237 
238 error_exit:
239 	ACPI_EXCEPTION((AE_INFO, status, "During device initialization"));
240 	return_ACPI_STATUS(status);
241 }
242 
243 /*******************************************************************************
244  *
245  * FUNCTION:    acpi_ns_init_one_package
246  *
247  * PARAMETERS:  obj_handle      - Node
248  *              level           - Current nesting level
249  *              context         - Not used
250  *              return_value    - Not used
251  *
252  * RETURN:      Status
253  *
254  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every package
255  *              within the namespace. Used during dynamic load of an SSDT.
256  *
257  ******************************************************************************/
258 
259 acpi_status
acpi_ns_init_one_package(acpi_handle obj_handle,u32 level,void * context,void ** return_value)260 acpi_ns_init_one_package(acpi_handle obj_handle,
261 			 u32 level, void *context, void **return_value)
262 {
263 	acpi_status status;
264 	union acpi_operand_object *obj_desc;
265 	struct acpi_namespace_node *node =
266 	    (struct acpi_namespace_node *)obj_handle;
267 
268 	obj_desc = acpi_ns_get_attached_object(node);
269 	if (!obj_desc) {
270 		return (AE_OK);
271 	}
272 
273 	/* Exit if package is already initialized */
274 
275 	if (obj_desc->package.flags & AOPOBJ_DATA_VALID) {
276 		return (AE_OK);
277 	}
278 
279 	status = acpi_ds_get_package_arguments(obj_desc);
280 	if (ACPI_FAILURE(status)) {
281 		return (AE_OK);
282 	}
283 
284 	status =
285 	    acpi_ut_walk_package_tree(obj_desc, NULL,
286 				      acpi_ds_init_package_element, NULL);
287 	if (ACPI_FAILURE(status)) {
288 		return (AE_OK);
289 	}
290 
291 	obj_desc->package.flags |= AOPOBJ_DATA_VALID;
292 	return (AE_OK);
293 }
294 
295 /*******************************************************************************
296  *
297  * FUNCTION:    acpi_ns_init_one_object
298  *
299  * PARAMETERS:  obj_handle      - Node
300  *              level           - Current nesting level
301  *              context         - Points to a init info struct
302  *              return_value    - Not used
303  *
304  * RETURN:      Status
305  *
306  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
307  *              within the namespace.
308  *
309  *              Currently, the only objects that require initialization are:
310  *              1) Methods
311  *              2) Op Regions
312  *
313  ******************************************************************************/
314 
315 static acpi_status
acpi_ns_init_one_object(acpi_handle obj_handle,u32 level,void * context,void ** return_value)316 acpi_ns_init_one_object(acpi_handle obj_handle,
317 			u32 level, void *context, void **return_value)
318 {
319 	acpi_object_type type;
320 	acpi_status status = AE_OK;
321 	struct acpi_init_walk_info *info =
322 	    (struct acpi_init_walk_info *)context;
323 	struct acpi_namespace_node *node =
324 	    (struct acpi_namespace_node *)obj_handle;
325 	union acpi_operand_object *obj_desc;
326 
327 	ACPI_FUNCTION_NAME(ns_init_one_object);
328 
329 	info->object_count++;
330 
331 	/* And even then, we are only interested in a few object types */
332 
333 	type = acpi_ns_get_type(obj_handle);
334 	obj_desc = acpi_ns_get_attached_object(node);
335 	if (!obj_desc) {
336 		return (AE_OK);
337 	}
338 
339 	/* Increment counters for object types we are looking for */
340 
341 	switch (type) {
342 	case ACPI_TYPE_REGION:
343 
344 		info->op_region_count++;
345 		break;
346 
347 	case ACPI_TYPE_BUFFER_FIELD:
348 
349 		info->field_count++;
350 		break;
351 
352 	case ACPI_TYPE_LOCAL_BANK_FIELD:
353 
354 		info->field_count++;
355 		break;
356 
357 	case ACPI_TYPE_BUFFER:
358 
359 		info->buffer_count++;
360 		break;
361 
362 	case ACPI_TYPE_PACKAGE:
363 
364 		info->package_count++;
365 		break;
366 
367 	default:
368 
369 		/* No init required, just exit now */
370 
371 		return (AE_OK);
372 	}
373 
374 	/* If the object is already initialized, nothing else to do */
375 
376 	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
377 		return (AE_OK);
378 	}
379 
380 	/* Must lock the interpreter before executing AML code */
381 
382 	acpi_ex_enter_interpreter();
383 
384 	/*
385 	 * Only initialization of Package objects can be deferred, in order
386 	 * to support forward references.
387 	 */
388 	switch (type) {
389 	case ACPI_TYPE_LOCAL_BANK_FIELD:
390 
391 		/* TBD: bank_fields do not require deferred init, remove this code */
392 
393 		info->field_init++;
394 		status = acpi_ds_get_bank_field_arguments(obj_desc);
395 		break;
396 
397 	case ACPI_TYPE_PACKAGE:
398 
399 		/* Complete the initialization/resolution of the package object */
400 
401 		info->package_init++;
402 		status =
403 		    acpi_ns_init_one_package(obj_handle, level, NULL, NULL);
404 		break;
405 
406 	default:
407 
408 		/* No other types should get here */
409 
410 		status = AE_TYPE;
411 		ACPI_EXCEPTION((AE_INFO, status,
412 				"Opcode is not deferred [%4.4s] (%s)",
413 				acpi_ut_get_node_name(node),
414 				acpi_ut_get_type_name(type)));
415 		break;
416 	}
417 
418 	if (ACPI_FAILURE(status)) {
419 		ACPI_EXCEPTION((AE_INFO, status,
420 				"Could not execute arguments for [%4.4s] (%s)",
421 				acpi_ut_get_node_name(node),
422 				acpi_ut_get_type_name(type)));
423 	}
424 
425 	/*
426 	 * We ignore errors from above, and always return OK, since we don't want
427 	 * to abort the walk on any single error.
428 	 */
429 	acpi_ex_exit_interpreter();
430 	return (AE_OK);
431 }
432 
433 /*******************************************************************************
434  *
435  * FUNCTION:    acpi_ns_find_ini_methods
436  *
437  * PARAMETERS:  acpi_walk_callback
438  *
439  * RETURN:      acpi_status
440  *
441  * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
442  *              device/processor/thermal objects, and marks the entire subtree
443  *              with a SUBTREE_HAS_INI flag. This flag is used during the
444  *              subsequent device initialization walk to avoid entire subtrees
445  *              that do not contain an _INI.
446  *
447  ******************************************************************************/
448 
449 static acpi_status
acpi_ns_find_ini_methods(acpi_handle obj_handle,u32 nesting_level,void * context,void ** return_value)450 acpi_ns_find_ini_methods(acpi_handle obj_handle,
451 			 u32 nesting_level, void *context, void **return_value)
452 {
453 	struct acpi_device_walk_info *info =
454 	    ACPI_CAST_PTR(struct acpi_device_walk_info, context);
455 	struct acpi_namespace_node *node;
456 	struct acpi_namespace_node *parent_node;
457 
458 	/* Keep count of device/processor/thermal objects */
459 
460 	node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
461 	if ((node->type == ACPI_TYPE_DEVICE) ||
462 	    (node->type == ACPI_TYPE_PROCESSOR) ||
463 	    (node->type == ACPI_TYPE_THERMAL)) {
464 		info->device_count++;
465 		return (AE_OK);
466 	}
467 
468 	/* We are only looking for methods named _INI */
469 
470 	if (!ACPI_COMPARE_NAMESEG(node->name.ascii, METHOD_NAME__INI)) {
471 		return (AE_OK);
472 	}
473 
474 	/*
475 	 * The only _INI methods that we care about are those that are
476 	 * present under Device, Processor, and Thermal objects.
477 	 */
478 	parent_node = node->parent;
479 	switch (parent_node->type) {
480 	case ACPI_TYPE_DEVICE:
481 	case ACPI_TYPE_PROCESSOR:
482 	case ACPI_TYPE_THERMAL:
483 
484 		/* Mark parent and bubble up the INI present flag to the root */
485 
486 		while (parent_node) {
487 			parent_node->flags |= ANOBJ_SUBTREE_HAS_INI;
488 			parent_node = parent_node->parent;
489 		}
490 		break;
491 
492 	default:
493 
494 		break;
495 	}
496 
497 	return (AE_OK);
498 }
499 
500 /*******************************************************************************
501  *
502  * FUNCTION:    acpi_ns_init_one_device
503  *
504  * PARAMETERS:  acpi_walk_callback
505  *
506  * RETURN:      acpi_status
507  *
508  * DESCRIPTION: This is called once per device soon after ACPI is enabled
509  *              to initialize each device. It determines if the device is
510  *              present, and if so, calls _INI.
511  *
512  ******************************************************************************/
513 
514 static acpi_status
acpi_ns_init_one_device(acpi_handle obj_handle,u32 nesting_level,void * context,void ** return_value)515 acpi_ns_init_one_device(acpi_handle obj_handle,
516 			u32 nesting_level, void *context, void **return_value)
517 {
518 	struct acpi_device_walk_info *walk_info =
519 	    ACPI_CAST_PTR(struct acpi_device_walk_info, context);
520 	struct acpi_evaluate_info *info = walk_info->evaluate_info;
521 	u32 flags;
522 	acpi_status status;
523 	struct acpi_namespace_node *device_node;
524 
525 	ACPI_FUNCTION_TRACE(ns_init_one_device);
526 
527 	/* We are interested in Devices, Processors and thermal_zones only */
528 
529 	device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
530 	if ((device_node->type != ACPI_TYPE_DEVICE) &&
531 	    (device_node->type != ACPI_TYPE_PROCESSOR) &&
532 	    (device_node->type != ACPI_TYPE_THERMAL)) {
533 		return_ACPI_STATUS(AE_OK);
534 	}
535 
536 	/*
537 	 * Because of an earlier namespace analysis, all subtrees that contain an
538 	 * _INI method are tagged.
539 	 *
540 	 * If this device subtree does not contain any _INI methods, we
541 	 * can exit now and stop traversing this entire subtree.
542 	 */
543 	if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) {
544 		return_ACPI_STATUS(AE_CTRL_DEPTH);
545 	}
546 
547 	/*
548 	 * Run _STA to determine if this device is present and functioning. We
549 	 * must know this information for two important reasons (from ACPI spec):
550 	 *
551 	 * 1) We can only run _INI if the device is present.
552 	 * 2) We must abort the device tree walk on this subtree if the device is
553 	 *    not present and is not functional (we will not examine the children)
554 	 *
555 	 * The _STA method is not required to be present under the device, we
556 	 * assume the device is present if _STA does not exist.
557 	 */
558 	ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
559 			(ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA));
560 
561 	status = acpi_ut_execute_STA(device_node, &flags);
562 	if (ACPI_FAILURE(status)) {
563 
564 		/* Ignore error and move on to next device */
565 
566 		return_ACPI_STATUS(AE_OK);
567 	}
568 
569 	/*
570 	 * Flags == -1 means that _STA was not found. In this case, we assume that
571 	 * the device is both present and functional.
572 	 *
573 	 * From the ACPI spec, description of _STA:
574 	 *
575 	 * "If a device object (including the processor object) does not have an
576 	 * _STA object, then OSPM assumes that all of the above bits are set (in
577 	 * other words, the device is present, ..., and functioning)"
578 	 */
579 	if (flags != ACPI_UINT32_MAX) {
580 		walk_info->num_STA++;
581 	}
582 
583 	/*
584 	 * Examine the PRESENT and FUNCTIONING status bits
585 	 *
586 	 * Note: ACPI spec does not seem to specify behavior for the present but
587 	 * not functioning case, so we assume functioning if present.
588 	 */
589 	if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
590 
591 		/* Device is not present, we must examine the Functioning bit */
592 
593 		if (flags & ACPI_STA_DEVICE_FUNCTIONING) {
594 			/*
595 			 * Device is not present but is "functioning". In this case,
596 			 * we will not run _INI, but we continue to examine the children
597 			 * of this device.
598 			 *
599 			 * From the ACPI spec, description of _STA: (note - no mention
600 			 * of whether to run _INI or not on the device in question)
601 			 *
602 			 * "_STA may return bit 0 clear (not present) with bit 3 set
603 			 * (device is functional). This case is used to indicate a valid
604 			 * device for which no device driver should be loaded (for example,
605 			 * a bridge device.) Children of this device may be present and
606 			 * valid. OSPM should continue enumeration below a device whose
607 			 * _STA returns this bit combination"
608 			 */
609 			return_ACPI_STATUS(AE_OK);
610 		} else {
611 			/*
612 			 * Device is not present and is not functioning. We must abort the
613 			 * walk of this subtree immediately -- don't look at the children
614 			 * of such a device.
615 			 *
616 			 * From the ACPI spec, description of _INI:
617 			 *
618 			 * "If the _STA method indicates that the device is not present,
619 			 * OSPM will not run the _INI and will not examine the children
620 			 * of the device for _INI methods"
621 			 */
622 			return_ACPI_STATUS(AE_CTRL_DEPTH);
623 		}
624 	}
625 
626 	/*
627 	 * The device is present or is assumed present if no _STA exists.
628 	 * Run the _INI if it exists (not required to exist)
629 	 *
630 	 * Note: We know there is an _INI within this subtree, but it may not be
631 	 * under this particular device, it may be lower in the branch.
632 	 */
633 	if (!ACPI_COMPARE_NAMESEG(device_node->name.ascii, "_SB_") ||
634 	    device_node->parent != acpi_gbl_root_node) {
635 		ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
636 				(ACPI_TYPE_METHOD, device_node,
637 				 METHOD_NAME__INI));
638 
639 		memset(info, 0, sizeof(struct acpi_evaluate_info));
640 		info->prefix_node = device_node;
641 		info->relative_pathname = METHOD_NAME__INI;
642 		info->parameters = NULL;
643 		info->flags = ACPI_IGNORE_RETURN_VALUE;
644 
645 		status = acpi_ns_evaluate(info);
646 		if (ACPI_SUCCESS(status)) {
647 			walk_info->num_INI++;
648 		}
649 #ifdef ACPI_DEBUG_OUTPUT
650 		else if (status != AE_NOT_FOUND) {
651 
652 			/* Ignore error and move on to next device */
653 
654 			char *scope_name =
655 			    acpi_ns_get_normalized_pathname(device_node, TRUE);
656 
657 			ACPI_EXCEPTION((AE_INFO, status,
658 					"during %s._INI execution",
659 					scope_name));
660 			ACPI_FREE(scope_name);
661 		}
662 #endif
663 	}
664 
665 	/* Ignore errors from above */
666 
667 	status = AE_OK;
668 
669 	/*
670 	 * The _INI method has been run if present; call the Global Initialization
671 	 * Handler for this device.
672 	 */
673 	if (acpi_gbl_init_handler) {
674 		status =
675 		    acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI);
676 	}
677 
678 	return_ACPI_STATUS(status);
679 }
680