summaryrefslogtreecommitdiff
path: root/net/rfkill/rfkill.c
blob: 022fe50ab0e0f5766e9794bf4082a8a393abe86d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
/*
 * Copyright (C) 2006 - 2007 Ivo van Doorn
 * Copyright (C) 2007 Dmitry Torokhov
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the
 * Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/workqueue.h>
#include <linux/capability.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/rfkill.h>

/* Get declaration of rfkill_switch_all() to shut up sparse. */
#include "rfkill-input.h"


MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>");
MODULE_VERSION("1.0");
MODULE_DESCRIPTION("RF switch support");
MODULE_LICENSE("GPL");

static LIST_HEAD(rfkill_list);	/* list of registered rf switches */
static DEFINE_MUTEX(rfkill_mutex);

static unsigned int rfkill_default_state = RFKILL_STATE_UNBLOCKED;
module_param_named(default_state, rfkill_default_state, uint, 0444);
MODULE_PARM_DESC(default_state,
		 "Default initial state for all radio types, 0 = radio off");

static enum rfkill_state rfkill_states[RFKILL_TYPE_MAX];

static BLOCKING_NOTIFIER_HEAD(rfkill_notifier_list);


/**
 * register_rfkill_notifier - Add notifier to rfkill notifier chain
 * @nb: pointer to the new entry to add to the chain
 *
 * See blocking_notifier_chain_register() for return value and further
 * observations.
 *
 * Adds a notifier to the rfkill notifier chain.  The chain will be
 * called with a pointer to the relevant rfkill structure as a parameter,
 * refer to include/linux/rfkill.h for the possible events.
 *
 * Notifiers added to this chain are to always return NOTIFY_DONE.  This
 * chain is a blocking notifier chain: notifiers can sleep.
 *
 * Calls to this chain may have been done through a workqueue.  One must
 * assume unordered asynchronous behaviour, there is no way to know if
 * actions related to the event that generated the notification have been
 * carried out already.
 */
int register_rfkill_notifier(struct notifier_block *nb)
{
	return blocking_notifier_chain_register(&rfkill_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(register_rfkill_notifier);

/**
 * unregister_rfkill_notifier - remove notifier from rfkill notifier chain
 * @nb: pointer to the entry to remove from the chain
 *
 * See blocking_notifier_chain_unregister() for return value and further
 * observations.
 *
 * Removes a notifier from the rfkill notifier chain.
 */
int unregister_rfkill_notifier(struct notifier_block *nb)
{
	return blocking_notifier_chain_unregister(&rfkill_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(unregister_rfkill_notifier);


static void rfkill_led_trigger(struct rfkill *rfkill,
			       enum rfkill_state state)
{
#ifdef CONFIG_RFKILL_LEDS
	struct led_trigger *led = &rfkill->led_trigger;

	if (!led->name)
		return;
	if (state != RFKILL_STATE_UNBLOCKED)
		led_trigger_event(led, LED_OFF);
	else
		led_trigger_event(led, LED_FULL);
#endif /* CONFIG_RFKILL_LEDS */
}

static void notify_rfkill_state_change(struct rfkill *rfkill)
{
	blocking_notifier_call_chain(&rfkill_notifier_list,
			RFKILL_STATE_CHANGED,
			rfkill);
}

static void update_rfkill_state(struct rfkill *rfkill)
{
	enum rfkill_state newstate, oldstate;

	if (rfkill->get_state) {
		mutex_lock(&rfkill->mutex);
		if (!rfkill->get_state(rfkill->data, &newstate)) {
			oldstate = rfkill->state;
			rfkill->state = newstate;
			if (oldstate != newstate)
				notify_rfkill_state_change(rfkill);
		}
		mutex_unlock(&rfkill->mutex);
	}
}

/**
 * rfkill_toggle_radio - wrapper for toggle_radio hook
 *
 * @rfkill: the rfkill struct to use
 * @force: calls toggle_radio even if cache says it is not needed,
 *	and also makes sure notifications of the state will be
 *	sent even if it didn't change
 * @state: the new state to call toggle_radio() with
 *
 * Calls rfkill->toggle_radio, enforcing the API for toggle_radio
 * calls and handling all the red tape such as issuing notifications
 * if the call is successful.
 *
 * Note that @force cannot override a (possibly cached) state of
 * RFKILL_STATE_HARD_BLOCKED.  Any device making use of
 * RFKILL_STATE_HARD_BLOCKED implements either get_state() or
 * rfkill_force_state(), so the cache either is bypassed or valid.
 *
 * Note that we do call toggle_radio for RFKILL_STATE_SOFT_BLOCKED
 * even if the radio is in RFKILL_STATE_HARD_BLOCKED state, so as to
 * give the driver a hint that it should double-BLOCK the transmitter.
 *
 * Caller must have aquired rfkill_mutex.
 */
static int rfkill_toggle_radio(struct rfkill *rfkill,
				enum rfkill_state state,
				int force)
{
	int retval = 0;
	enum rfkill_state oldstate, newstate;

	oldstate = rfkill->state;

	if (rfkill->get_state && !force &&
	    !rfkill->get_state(rfkill->data, &newstate))
		rfkill->state = newstate;

	switch (state) {
	case RFKILL_STATE_HARD_BLOCKED:
		/* typically happens when refreshing hardware state,
		 * such as on resume */
		state = RFKILL_STATE_SOFT_BLOCKED;
		break;
	case RFKILL_STATE_UNBLOCKED:
		/* force can't override this, only rfkill_force_state() can */
		if (rfkill->state == RFKILL_STATE_HARD_BLOCKED)
			return -EPERM;
		break;
	case RFKILL_STATE_SOFT_BLOCKED:
		/* nothing to do, we want to give drivers the hint to double
		 * BLOCK even a transmitter that is already in state
		 * RFKILL_STATE_HARD_BLOCKED */
		break;
	}

	if (force || state != rfkill->state) {
		retval = rfkill->toggle_radio(rfkill->data, state);
		/* never allow a HARD->SOFT downgrade! */
		if (!retval && rfkill->state != RFKILL_STATE_HARD_BLOCKED)
			rfkill->state = state;
	}

	if (force || rfkill->state != oldstate) {
		rfkill_led_trigger(rfkill, rfkill->state);
		notify_rfkill_state_change(rfkill);
	}

	return retval;
}

/**
 * rfkill_switch_all - Toggle state of all switches of given type
 * @type: type of interfaces to be affeceted
 * @state: the new state
 *
 * This function toggles state of all switches of given type unless
 * a specific switch is claimed by userspace in which case it is
 * left alone.
 */
void rfkill_switch_all(enum rfkill_type type, enum rfkill_state state)
{
	struct rfkill *rfkill;

	mutex_lock(&rfkill_mutex);

	rfkill_states[type] = state;

	list_for_each_entry(rfkill, &rfkill_list, node) {
		if ((!rfkill->user_claim) && (rfkill->type == type))
			rfkill_toggle_radio(rfkill, state, 0);
	}

	mutex_unlock(&rfkill_mutex);
}
EXPORT_SYMBOL(rfkill_switch_all);

/**
 * rfkill_epo - emergency power off all transmitters
 *
 * This kicks all rfkill devices to RFKILL_STATE_SOFT_BLOCKED, ignoring
 * everything in its path but rfkill_mutex.
 */
void rfkill_epo(void)
{
	struct rfkill *rfkill;

	mutex_lock(&rfkill_mutex);
	list_for_each_entry(rfkill, &rfkill_list, node) {
		rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
	}
	mutex_unlock(&rfkill_mutex);
}
EXPORT_SYMBOL_GPL(rfkill_epo);

/**
 * rfkill_force_state - Force the internal rfkill radio state
 * @rfkill: pointer to the rfkill class to modify.
 * @state: the current radio state the class should be forced to.
 *
 * This function updates the internal state of the radio cached
 * by the rfkill class.  It should be used when the driver gets
 * a notification by the firmware/hardware of the current *real*
 * state of the radio rfkill switch.
 *
 * Devices which are subject to external changes on their rfkill
 * state (such as those caused by a hardware rfkill line) MUST
 * have their driver arrange to call rfkill_force_state() as soon
 * as possible after such a change.
 *
 * This function may not be called from an atomic context.
 */
int rfkill_force_state(struct rfkill *rfkill, enum rfkill_state state)
{
	enum rfkill_state oldstate;

	if (state != RFKILL_STATE_SOFT_BLOCKED &&
	    state != RFKILL_STATE_UNBLOCKED &&
	    state != RFKILL_STATE_HARD_BLOCKED)
		return -EINVAL;

	mutex_lock(&rfkill->mutex);

	oldstate = rfkill->state;
	rfkill->state = state;

	if (state != oldstate)
		notify_rfkill_state_change(rfkill);

	mutex_unlock(&rfkill->mutex);

	return 0;
}
EXPORT_SYMBOL(rfkill_force_state);

static ssize_t rfkill_name_show(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%s\n", rfkill->name);
}

static const char *rfkill_get_type_str(enum rfkill_type type)
{
	switch (type) {
	case RFKILL_TYPE_WLAN:
		return "wlan";
	case RFKILL_TYPE_BLUETOOTH:
		return "bluetooth";
	case RFKILL_TYPE_UWB:
		return "ultrawideband";
	case RFKILL_TYPE_WIMAX:
		return "wimax";
	case RFKILL_TYPE_WWAN:
		return "wwan";
	default:
		BUG();
	}
}

static ssize_t rfkill_type_show(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%s\n", rfkill_get_type_str(rfkill->type));
}

static ssize_t rfkill_state_show(struct device *dev,
				 struct device_attribute *attr,
				 char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	update_rfkill_state(rfkill);
	return sprintf(buf, "%d\n", rfkill->state);
}

static ssize_t rfkill_state_store(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
	struct rfkill *rfkill = to_rfkill(dev);
	unsigned int state = simple_strtoul(buf, NULL, 0);
	int error;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	/* RFKILL_STATE_HARD_BLOCKED is illegal here... */
	if (state != RFKILL_STATE_UNBLOCKED &&
	    state != RFKILL_STATE_SOFT_BLOCKED)
		return -EINVAL;

	if (mutex_lock_interruptible(&rfkill->mutex))
		return -ERESTARTSYS;
	error = rfkill_toggle_radio(rfkill, state, 0);
	mutex_unlock(&rfkill->mutex);

	return error ? error : count;
}

static ssize_t rfkill_claim_show(struct device *dev,
				 struct device_attribute *attr,
				 char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%d", rfkill->user_claim);
}

static ssize_t rfkill_claim_store(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
	struct rfkill *rfkill = to_rfkill(dev);
	bool claim = !!simple_strtoul(buf, NULL, 0);
	int error;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	/*
	 * Take the global lock to make sure the kernel is not in
	 * the middle of rfkill_switch_all
	 */
	error = mutex_lock_interruptible(&rfkill_mutex);
	if (error)
		return error;

	if (rfkill->user_claim_unsupported) {
		error = -EOPNOTSUPP;
		goto out_unlock;
	}
	if (rfkill->user_claim != claim) {
		if (!claim)
			rfkill_toggle_radio(rfkill,
					    rfkill_states[rfkill->type],
					    0);
		rfkill->user_claim = claim;
	}

out_unlock:
	mutex_unlock(&rfkill_mutex);

	return error ? error : count;
}

static struct device_attribute rfkill_dev_attrs[] = {
	__ATTR(name, S_IRUGO, rfkill_name_show, NULL),
	__ATTR(type, S_IRUGO, rfkill_type_show, NULL),
	__ATTR(state, S_IRUGO|S_IWUSR, rfkill_state_show, rfkill_state_store),
	__ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store),
	__ATTR_NULL
};

static void rfkill_release(struct device *dev)
{
	struct rfkill *rfkill = to_rfkill(dev);

	kfree(rfkill);
	module_put(THIS_MODULE);
}

#ifdef CONFIG_PM
static int rfkill_suspend(struct device *dev, pm_message_t state)
{
	struct rfkill *rfkill = to_rfkill(dev);

	if (dev->power.power_state.event != state.event) {
		if (state.event & PM_EVENT_SLEEP) {
			/* Stop transmitter, keep state, no notifies */
			update_rfkill_state(rfkill);

			mutex_lock(&rfkill->mutex);
			rfkill->toggle_radio(rfkill->data,
						RFKILL_STATE_SOFT_BLOCKED);
			mutex_unlock(&rfkill->mutex);
		}

		dev->power.power_state = state;
	}

	return 0;
}

static int rfkill_resume(struct device *dev)
{
	struct rfkill *rfkill = to_rfkill(dev);

	if (dev->power.power_state.event != PM_EVENT_ON) {
		mutex_lock(&rfkill->mutex);

		/* restore radio state AND notify everybody */
		rfkill_toggle_radio(rfkill, rfkill->state, 1);

		mutex_unlock(&rfkill->mutex);
	}

	dev->power.power_state = PMSG_ON;
	return 0;
}
#else
#define rfkill_suspend NULL
#define rfkill_resume NULL
#endif

static int rfkill_blocking_uevent_notifier(struct notifier_block *nb,
					unsigned long eventid,
					void *data)
{
	struct rfkill *rfkill = (struct rfkill *)data;

	switch (eventid) {
	case RFKILL_STATE_CHANGED:
		kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);
		break;
	default:
		break;
	}

	return NOTIFY_DONE;
}

static struct notifier_block rfkill_blocking_uevent_nb = {
	.notifier_call	= rfkill_blocking_uevent_notifier,
	.priority	= 0,
};

static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	struct rfkill *rfkill = to_rfkill(dev);
	int error;

	error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name);
	if (error)
		return error;
	error = add_uevent_var(env, "RFKILL_TYPE=%s",
				rfkill_get_type_str(rfkill->type));
	if (error)
		return error;
	error = add_uevent_var(env, "RFKILL_STATE=%d", rfkill->state);
	return error;
}

static struct class rfkill_class = {
	.name		= "rfkill",
	.dev_release	= rfkill_release,
	.dev_attrs	= rfkill_dev_attrs,
	.suspend	= rfkill_suspend,
	.resume		= rfkill_resume,
	.dev_uevent	= rfkill_dev_uevent,
};

static int rfkill_add_switch(struct rfkill *rfkill)
{
	mutex_lock(&rfkill_mutex);

	rfkill_toggle_radio(rfkill, rfkill_states[rfkill->type], 0);

	list_add_tail(&rfkill->node, &rfkill_list);

	mutex_unlock(&rfkill_mutex);

	return 0;
}

static void rfkill_remove_switch(struct rfkill *rfkill)
{
	mutex_lock(&rfkill_mutex);
	list_del_init(&rfkill->node);
	rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
	mutex_unlock(&rfkill_mutex);
}

/**
 * rfkill_allocate - allocate memory for rfkill structure.
 * @parent: device that has rf switch on it
 * @type: type of the switch (RFKILL_TYPE_*)
 *
 * This function should be called by the network driver when it needs
 * rfkill structure. Once the structure is allocated the driver shoud
 * finish its initialization by setting name, private data, enable_radio
 * and disable_radio methods and then register it with rfkill_register().
 * NOTE: If registration fails the structure shoudl be freed by calling
 * rfkill_free() otherwise rfkill_unregister() should be used.
 */
struct rfkill *rfkill_allocate(struct device *parent, enum rfkill_type type)
{
	struct rfkill *rfkill;
	struct device *dev;

	rfkill = kzalloc(sizeof(struct rfkill), GFP_KERNEL);
	if (!rfkill)
		return NULL;

	mutex_init(&rfkill->mutex);
	INIT_LIST_HEAD(&rfkill->node);
	rfkill->type = type;

	dev = &rfkill->dev;
	dev->class = &rfkill_class;
	dev->parent = parent;
	device_initialize(dev);

	__module_get(THIS_MODULE);

	return rfkill;
}
EXPORT_SYMBOL(rfkill_allocate);

/**
 * rfkill_free - Mark rfkill structure for deletion
 * @rfkill: rfkill structure to be destroyed
 *
 * Decrements reference count of rfkill structure so it is destroyed.
 * Note that rfkill_free() should _not_ be called after rfkill_unregister().
 */
void rfkill_free(struct rfkill *rfkill)
{
	if (rfkill)
		put_device(&rfkill->dev);
}
EXPORT_SYMBOL(rfkill_free);

static void rfkill_led_trigger_register(struct rfkill *rfkill)
{
#ifdef CONFIG_RFKILL_LEDS
	int error;

	rfkill->led_trigger.name = rfkill->dev.bus_id;
	error = led_trigger_register(&rfkill->led_trigger);
	if (error)
		rfkill->led_trigger.name = NULL;
#endif /* CONFIG_RFKILL_LEDS */
}

static void rfkill_led_trigger_unregister(struct rfkill *rfkill)
{
#ifdef CONFIG_RFKILL_LEDS
	if (rfkill->led_trigger.name)
		led_trigger_unregister(&rfkill->led_trigger);
#endif
}

/**
 * rfkill_register - Register a rfkill structure.
 * @rfkill: rfkill structure to be registered
 *
 * This function should be called by the network driver when the rfkill
 * structure needs to be registered. Immediately from registration the
 * switch driver should be able to service calls to toggle_radio.
 */
int rfkill_register(struct rfkill *rfkill)
{
	static atomic_t rfkill_no = ATOMIC_INIT(0);
	struct device *dev = &rfkill->dev;
	int error;

	if (!rfkill->toggle_radio)
		return -EINVAL;
	if (rfkill->type >= RFKILL_TYPE_MAX)
		return -EINVAL;

	snprintf(dev->bus_id, sizeof(dev->bus_id),
		 "rfkill%ld", (long)atomic_inc_return(&rfkill_no) - 1);

	rfkill_led_trigger_register(rfkill);

	error = rfkill_add_switch(rfkill);
	if (error) {
		rfkill_led_trigger_unregister(rfkill);
		return error;
	}

	error = device_add(dev);
	if (error) {
		rfkill_led_trigger_unregister(rfkill);
		rfkill_remove_switch(rfkill);
		return error;
	}

	return 0;
}
EXPORT_SYMBOL(rfkill_register);

/**
 * rfkill_unregister - Unregister a rfkill structure.
 * @rfkill: rfkill structure to be unregistered
 *
 * This function should be called by the network driver during device
 * teardown to destroy rfkill structure. Note that rfkill_free() should
 * _not_ be called after rfkill_unregister().
 */
void rfkill_unregister(struct rfkill *rfkill)
{
	device_del(&rfkill->dev);
	rfkill_remove_switch(rfkill);
	rfkill_led_trigger_unregister(rfkill);
	put_device(&rfkill->dev);
}
EXPORT_SYMBOL(rfkill_unregister);

/*
 * Rfkill module initialization/deinitialization.
 */
static int __init rfkill_init(void)
{
	int error;
	int i;

	/* RFKILL_STATE_HARD_BLOCKED is illegal here... */
	if (rfkill_default_state != RFKILL_STATE_SOFT_BLOCKED &&
	    rfkill_default_state != RFKILL_STATE_UNBLOCKED)
		return -EINVAL;

	for (i = 0; i < ARRAY_SIZE(rfkill_states); i++)
		rfkill_states[i] = rfkill_default_state;

	error = class_register(&rfkill_class);
	if (error) {
		printk(KERN_ERR "rfkill: unable to register rfkill class\n");
		return error;
	}

	register_rfkill_notifier(&rfkill_blocking_uevent_nb);

	return 0;
}

static void __exit rfkill_exit(void)
{
	unregister_rfkill_notifier(&rfkill_blocking_uevent_nb);
	class_unregister(&rfkill_class);
}

subsys_initcall(rfkill_init);
module_exit(rfkill_exit);