ata: libata-scsi: fix ata_dsm_trim_pages() kernel-docgrafted

make htmldocs fails with:

  Documentation/driver-api/libata:604: ./drivers/ata/libata-scsi.c:2301:
  ERROR: Unexpected indentation. [docutils]

The Return: section of ata_dsm_trim_pages() ends its first sentence with
a colon and continues with an indented bullet list. reStructuredText
requires a blank line before an indented block, so docutils chokes on
the list.

Simply adding the missing blank line does not work either: Return: is a
kernel-doc "special section", which is terminated by the first blank
line, so the bullet list would end up in the Description section,
detached from the sentence introducing it.

Spell the two bounds out as prose instead, so that the Return: section
stays self-contained. Documentation-only change.

Fixes: e64e6b5dc867 ("ata: libata-scsi: scale DSM TRIM payload by MAX PAGES PER DSM COMMAND")
Reported-by: Thomas Huth <thuth@redhat.com>
Closes: https://lore.kernel.org/linux-ide/b0a0b8e8-cc4f-4c7b-8bc5-fee0712d405a@redhat.com/
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Link: https://lore.kernel.org/r/20260916130031.29990-2-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>

6 files changed, 2102 insertions, 0 deletions

diff --git a/net/rfkill/Kconfig b/net/rfkill/Kconfig
new file mode 100644
index 000000000..83a7af898
--- /dev/null
+++ b/net/rfkill/Kconfig
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# RF switch subsystem configuration
+#
+menuconfig RFKILL
+	tristate "RF switch subsystem support"
+	help
+	  Say Y here if you want to have control over RF switches
+	  found on many WiFi and Bluetooth cards.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called rfkill.
+
+# LED trigger support
+config RFKILL_LEDS
+	bool
+	depends on RFKILL
+	depends on LEDS_TRIGGERS = y || RFKILL = LEDS_TRIGGERS
+	default y
+
+config RFKILL_INPUT
+	bool "RF switch input support" if EXPERT
+	depends on RFKILL
+	depends on INPUT = y || RFKILL = INPUT
+	default y if !EXPERT
+
+config RFKILL_GPIO
+	tristate "GPIO RFKILL driver"
+	depends on RFKILL
+	depends on GPIOLIB || COMPILE_TEST
+	default n
+	help
+	  If you say yes here you get support of a generic gpio RFKILL
+	  driver.
diff --git a/net/rfkill/Makefile b/net/rfkill/Makefile
new file mode 100644
index 000000000..dc47b6174
--- /dev/null
+++ b/net/rfkill/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the RF switch subsystem.
+#
+
+rfkill-y			+= core.o
+rfkill-$(CONFIG_RFKILL_INPUT)	+= input.o
+obj-$(CONFIG_RFKILL)		+= rfkill.o
+obj-$(CONFIG_RFKILL_GPIO)	+= rfkill-gpio.o
diff --git a/net/rfkill/core.c b/net/rfkill/core.c
new file mode 100644
index 000000000..9e143c4bf
--- /dev/null
+++ b/net/rfkill/core.c
@@ -0,0 +1,1473 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2006 - 2007 Ivo van Doorn
+ * Copyright (C) 2007 Dmitry Torokhov
+ * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
+ */
+
+#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>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+#include <linux/wait.h>
+#include <linux/poll.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+
+#include "rfkill.h"
+
+#define POLL_INTERVAL		(5 * HZ)
+
+#define RFKILL_BLOCK_HW		BIT(0)
+#define RFKILL_BLOCK_SW		BIT(1)
+#define RFKILL_BLOCK_SW_PREV	BIT(2)
+#define RFKILL_BLOCK_ANY	(RFKILL_BLOCK_HW |\
+				 RFKILL_BLOCK_SW |\
+				 RFKILL_BLOCK_SW_PREV)
+#define RFKILL_BLOCK_SW_SETCALL	BIT(31)
+
+struct rfkill {
+	spinlock_t		lock;
+
+	enum rfkill_type	type;
+
+	unsigned long		state;
+	unsigned long		hard_block_reasons;
+
+	u32			idx;
+
+	bool			registered;
+	bool			persistent;
+	bool			polling_paused;
+	bool			suspended;
+	bool			need_sync;
+
+	const struct rfkill_ops	*ops;
+	void			*data;
+
+#ifdef CONFIG_RFKILL_LEDS
+	struct led_trigger	led_trigger;
+	const char		*ledtrigname;
+#endif
+
+	struct device		dev;
+	struct list_head	node;
+
+	struct delayed_work	poll_work;
+	struct work_struct	uevent_work;
+	struct work_struct	sync_work;
+	char			name[];
+};
+#define to_rfkill(d)	container_of(d, struct rfkill, dev)
+
+struct rfkill_int_event {
+	struct list_head	list;
+	struct rfkill_event_ext	ev;
+};
+
+/* Max rfkill events that can be "in-flight" for one data source */
+#define MAX_RFKILL_EVENT	1000
+struct rfkill_data {
+	struct list_head	list;
+	struct list_head	events;
+	struct mutex		mtx;
+	wait_queue_head_t	read_wait;
+	u32			event_count;
+	bool			input_handler;
+	u8			max_size;
+};
+
+
+MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>");
+MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
+MODULE_DESCRIPTION("RF switch support");
+MODULE_LICENSE("GPL");
+
+
+/*
+ * The locking here should be made much smarter, we currently have
+ * a bit of a stupid situation because drivers might want to register
+ * the rfkill struct under their own lock, and take this lock during
+ * rfkill method calls -- which will cause an AB-BA deadlock situation.
+ *
+ * To fix that, we need to rework this code here to be mostly lock-free
+ * and only use the mutex for list manipulations, not to protect the
+ * various other global variables. Then we can avoid holding the mutex
+ * around driver operations, and all is happy.
+ */
+static LIST_HEAD(rfkill_list);	/* list of registered rf switches */
+static DEFINE_MUTEX(rfkill_global_mutex);
+static LIST_HEAD(rfkill_fds);	/* list of open fds of /dev/rfkill */
+
+static unsigned int rfkill_default_state = 1;
+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 struct {
+	bool cur, sav;
+} rfkill_global_states[NUM_RFKILL_TYPES];
+
+static bool rfkill_epo_lock_active;
+
+
+#ifdef CONFIG_RFKILL_LEDS
+static void rfkill_led_trigger_event(struct rfkill *rfkill)
+{
+	struct led_trigger *trigger;
+
+	if (!rfkill->registered)
+		return;
+
+	trigger = &rfkill->led_trigger;
+
+	if (rfkill->state & RFKILL_BLOCK_ANY)
+		led_trigger_event(trigger, LED_OFF);
+	else
+		led_trigger_event(trigger, LED_FULL);
+}
+
+static int rfkill_led_trigger_activate(struct led_classdev *led)
+{
+	struct rfkill *rfkill;
+
+	rfkill = container_of(led->trigger, struct rfkill, led_trigger);
+
+	rfkill_led_trigger_event(rfkill);
+
+	return 0;
+}
+
+const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
+{
+	return rfkill->led_trigger.name;
+}
+EXPORT_SYMBOL(rfkill_get_led_trigger_name);
+
+void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
+{
+	BUG_ON(!rfkill);
+
+	rfkill->ledtrigname = name;
+}
+EXPORT_SYMBOL(rfkill_set_led_trigger_name);
+
+static int rfkill_led_trigger_register(struct rfkill *rfkill)
+{
+	rfkill->led_trigger.name = rfkill->ledtrigname
+					? : dev_name(&rfkill->dev);
+	rfkill->led_trigger.activate = rfkill_led_trigger_activate;
+	return led_trigger_register(&rfkill->led_trigger);
+}
+
+static void rfkill_led_trigger_unregister(struct rfkill *rfkill)
+{
+	led_trigger_unregister(&rfkill->led_trigger);
+}
+
+static struct led_trigger rfkill_any_led_trigger;
+static struct led_trigger rfkill_none_led_trigger;
+static struct work_struct rfkill_global_led_trigger_work;
+
+static void rfkill_global_led_trigger_worker(struct work_struct *work)
+{
+	enum led_brightness brightness = LED_OFF;
+	struct rfkill *rfkill;
+
+	mutex_lock(&rfkill_global_mutex);
+	list_for_each_entry(rfkill, &rfkill_list, node) {
+		if (!(rfkill->state & RFKILL_BLOCK_ANY)) {
+			brightness = LED_FULL;
+			break;
+		}
+	}
+	mutex_unlock(&rfkill_global_mutex);
+
+	led_trigger_event(&rfkill_any_led_trigger, brightness);
+	led_trigger_event(&rfkill_none_led_trigger,
+			  brightness == LED_OFF ? LED_FULL : LED_OFF);
+}
+
+static void rfkill_global_led_trigger_event(void)
+{
+	schedule_work(&rfkill_global_led_trigger_work);
+}
+
+static int rfkill_global_led_trigger_register(void)
+{
+	int ret;
+
+	INIT_WORK(&rfkill_global_led_trigger_work,
+			rfkill_global_led_trigger_worker);
+
+	rfkill_any_led_trigger.name = "rfkill-any";
+	ret = led_trigger_register(&rfkill_any_led_trigger);
+	if (ret)
+		return ret;
+
+	rfkill_none_led_trigger.name = "rfkill-none";
+	ret = led_trigger_register(&rfkill_none_led_trigger);
+	if (ret)
+		led_trigger_unregister(&rfkill_any_led_trigger);
+	else
+		/* Delay activation until all global triggers are registered */
+		rfkill_global_led_trigger_event();
+
+	return ret;
+}
+
+static void rfkill_global_led_trigger_unregister(void)
+{
+	led_trigger_unregister(&rfkill_none_led_trigger);
+	led_trigger_unregister(&rfkill_any_led_trigger);
+	cancel_work_sync(&rfkill_global_led_trigger_work);
+}
+#else
+static void rfkill_led_trigger_event(struct rfkill *rfkill)
+{
+}
+
+static inline int rfkill_led_trigger_register(struct rfkill *rfkill)
+{
+	return 0;
+}
+
+static inline void rfkill_led_trigger_unregister(struct rfkill *rfkill)
+{
+}
+
+static void rfkill_global_led_trigger_event(void)
+{
+}
+
+static int rfkill_global_led_trigger_register(void)
+{
+	return 0;
+}
+
+static void rfkill_global_led_trigger_unregister(void)
+{
+}
+#endif /* CONFIG_RFKILL_LEDS */
+
+static int rfkill_fill_event(struct rfkill_int_event *int_ev,
+			     struct rfkill *rfkill,
+			     struct rfkill_data *data,
+			     enum rfkill_operation op)
+{
+	struct rfkill_event_ext *ev = &int_ev->ev;
+	unsigned long flags;
+
+	ev->idx = rfkill->idx;
+	ev->type = rfkill->type;
+	ev->op = op;
+
+	spin_lock_irqsave(&rfkill->lock, flags);
+	ev->hard = !!(rfkill->state & RFKILL_BLOCK_HW);
+	ev->soft = !!(rfkill->state & (RFKILL_BLOCK_SW |
+					RFKILL_BLOCK_SW_PREV));
+	ev->hard_block_reasons = rfkill->hard_block_reasons;
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+
+	scoped_guard(mutex, &data->mtx) {
+		if (data->event_count++ > MAX_RFKILL_EVENT) {
+			data->event_count--;
+			return -ENOSPC;
+		}
+		list_add_tail(&int_ev->list, &data->events);
+	}
+	return 0;
+}
+
+static void rfkill_send_events(struct rfkill *rfkill, enum rfkill_operation op)
+{
+	struct rfkill_data *data;
+	struct rfkill_int_event *ev;
+
+	list_for_each_entry(data, &rfkill_fds, list) {
+		ev = kzalloc_obj(*ev);
+		if (!ev)
+			continue;
+		if (rfkill_fill_event(ev, rfkill, data, op)) {
+			kfree(ev);
+			continue;
+		}
+		wake_up_interruptible(&data->read_wait);
+	}
+}
+
+static void rfkill_event(struct rfkill *rfkill)
+{
+	if (!rfkill->registered)
+		return;
+
+	kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);
+
+	/* also send event to /dev/rfkill */
+	rfkill_send_events(rfkill, RFKILL_OP_CHANGE);
+}
+
+/**
+ * rfkill_set_block - wrapper for set_block method
+ *
+ * @rfkill: the rfkill struct to use
+ * @blocked: the new software state
+ *
+ * Calls the set_block method (when applicable) and handles notifications
+ * etc. as well.
+ */
+static void rfkill_set_block(struct rfkill *rfkill, bool blocked)
+{
+	unsigned long flags;
+	bool prev, curr;
+	int err;
+
+	if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP))
+		return;
+
+	/*
+	 * Some platforms (...!) generate input events which affect the
+	 * _hard_ kill state -- whenever something tries to change the
+	 * current software state query the hardware state too.
+	 */
+	if (rfkill->ops->query)
+		rfkill->ops->query(rfkill, rfkill->data);
+
+	spin_lock_irqsave(&rfkill->lock, flags);
+	prev = rfkill->state & RFKILL_BLOCK_SW;
+
+	if (prev)
+		rfkill->state |= RFKILL_BLOCK_SW_PREV;
+	else
+		rfkill->state &= ~RFKILL_BLOCK_SW_PREV;
+
+	if (blocked)
+		rfkill->state |= RFKILL_BLOCK_SW;
+	else
+		rfkill->state &= ~RFKILL_BLOCK_SW;
+
+	rfkill->state |= RFKILL_BLOCK_SW_SETCALL;
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+
+	err = rfkill->ops->set_block(rfkill->data, blocked);
+
+	spin_lock_irqsave(&rfkill->lock, flags);
+	if (err) {
+		/*
+		 * Failed -- reset status to _PREV, which may be different
+		 * from what we have set _PREV to earlier in this function
+		 * if rfkill_set_sw_state was invoked.
+		 */
+		if (rfkill->state & RFKILL_BLOCK_SW_PREV)
+			rfkill->state |= RFKILL_BLOCK_SW;
+		else
+			rfkill->state &= ~RFKILL_BLOCK_SW;
+	}
+	rfkill->state &= ~RFKILL_BLOCK_SW_SETCALL;
+	rfkill->state &= ~RFKILL_BLOCK_SW_PREV;
+	curr = rfkill->state & RFKILL_BLOCK_SW;
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+
+	rfkill_led_trigger_event(rfkill);
+	rfkill_global_led_trigger_event();
+
+	if (prev != curr)
+		rfkill_event(rfkill);
+}
+
+static void rfkill_sync(struct rfkill *rfkill)
+{
+	lockdep_assert_held(&rfkill_global_mutex);
+
+	if (!rfkill->need_sync)
+		return;
+
+	rfkill_set_block(rfkill, rfkill_global_states[rfkill->type].cur);
+	rfkill->need_sync = false;
+}
+
+static void rfkill_update_global_state(enum rfkill_type type, bool blocked)
+{
+	int i;
+
+	if (type != RFKILL_TYPE_ALL) {
+		rfkill_global_states[type].cur = blocked;
+		return;
+	}
+
+	for (i = 0; i < NUM_RFKILL_TYPES; i++)
+		rfkill_global_states[i].cur = blocked;
+}
+
+#ifdef CONFIG_RFKILL_INPUT
+static atomic_t rfkill_input_disabled = ATOMIC_INIT(0);
+
+/**
+ * __rfkill_switch_all - Toggle state of all switches of given type
+ * @type: type of interfaces to be affected
+ * @blocked: the new state
+ *
+ * This function sets the state of all switches of given type,
+ * unless a specific switch is suspended.
+ *
+ * Caller must have acquired rfkill_global_mutex.
+ */
+static void __rfkill_switch_all(const enum rfkill_type type, bool blocked)
+{
+	struct rfkill *rfkill;
+
+	rfkill_update_global_state(type, blocked);
+	list_for_each_entry(rfkill, &rfkill_list, node) {
+		if (rfkill->type != type && type != RFKILL_TYPE_ALL)
+			continue;
+
+		rfkill_set_block(rfkill, blocked);
+	}
+}
+
+/**
+ * rfkill_switch_all - Toggle state of all switches of given type
+ * @type: type of interfaces to be affected
+ * @blocked: the new state
+ *
+ * Acquires rfkill_global_mutex and calls __rfkill_switch_all(@type, @state).
+ * Please refer to __rfkill_switch_all() for details.
+ *
+ * Does nothing if the EPO lock is active.
+ */
+void rfkill_switch_all(enum rfkill_type type, bool blocked)
+{
+	if (atomic_read(&rfkill_input_disabled))
+		return;
+
+	mutex_lock(&rfkill_global_mutex);
+
+	if (!rfkill_epo_lock_active)
+		__rfkill_switch_all(type, blocked);
+
+	mutex_unlock(&rfkill_global_mutex);
+}
+
+/**
+ * rfkill_epo - emergency power off all transmitters
+ *
+ * This kicks all non-suspended rfkill devices to RFKILL_STATE_SOFT_BLOCKED,
+ * ignoring everything in its path but rfkill_global_mutex and rfkill->mutex.
+ *
+ * The global state before the EPO is saved and can be restored later
+ * using rfkill_restore_states().
+ */
+void rfkill_epo(void)
+{
+	struct rfkill *rfkill;
+	int i;
+
+	if (atomic_read(&rfkill_input_disabled))
+		return;
+
+	mutex_lock(&rfkill_global_mutex);
+
+	rfkill_epo_lock_active = true;
+	list_for_each_entry(rfkill, &rfkill_list, node)
+		rfkill_set_block(rfkill, true);
+
+	for (i = 0; i < NUM_RFKILL_TYPES; i++) {
+		rfkill_global_states[i].sav = rfkill_global_states[i].cur;
+		rfkill_global_states[i].cur = true;
+	}
+
+	mutex_unlock(&rfkill_global_mutex);
+}
+
+/**
+ * rfkill_restore_states - restore global states
+ *
+ * Restore (and sync switches to) the global state from the
+ * states in rfkill_default_states.  This can undo the effects of
+ * a call to rfkill_epo().
+ */
+void rfkill_restore_states(void)
+{
+	int i;
+
+	if (atomic_read(&rfkill_input_disabled))
+		return;
+
+	mutex_lock(&rfkill_global_mutex);
+
+	rfkill_epo_lock_active = false;
+	for (i = 0; i < NUM_RFKILL_TYPES; i++)
+		__rfkill_switch_all(i, rfkill_global_states[i].sav);
+	mutex_unlock(&rfkill_global_mutex);
+}
+
+/**
+ * rfkill_remove_epo_lock - unlock state changes
+ *
+ * Used by rfkill-input manually unlock state changes, when
+ * the EPO switch is deactivated.
+ */
+void rfkill_remove_epo_lock(void)
+{
+	if (atomic_read(&rfkill_input_disabled))
+		return;
+
+	mutex_lock(&rfkill_global_mutex);
+	rfkill_epo_lock_active = false;
+	mutex_unlock(&rfkill_global_mutex);
+}
+
+/**
+ * rfkill_is_epo_lock_active - returns true EPO is active
+ *
+ * Returns 0 (false) if there is NOT an active EPO condition,
+ * and 1 (true) if there is an active EPO condition, which
+ * locks all radios in one of the BLOCKED states.
+ *
+ * Can be called in atomic context.
+ */
+bool rfkill_is_epo_lock_active(void)
+{
+	return rfkill_epo_lock_active;
+}
+
+/**
+ * rfkill_get_global_sw_state - returns global state for a type
+ * @type: the type to get the global state of
+ *
+ * Returns the current global state for a given wireless
+ * device type.
+ */
+bool rfkill_get_global_sw_state(const enum rfkill_type type)
+{
+	return rfkill_global_states[type].cur;
+}
+#endif
+
+bool rfkill_set_hw_state_reason(struct rfkill *rfkill,
+				bool blocked,
+				enum rfkill_hard_block_reasons reason)
+{
+	unsigned long flags;
+	bool ret, prev;
+
+	BUG_ON(!rfkill);
+
+	spin_lock_irqsave(&rfkill->lock, flags);
+	prev = !!(rfkill->hard_block_reasons & reason);
+	if (blocked) {
+		rfkill->state |= RFKILL_BLOCK_HW;
+		rfkill->hard_block_reasons |= reason;
+	} else {
+		rfkill->hard_block_reasons &= ~reason;
+		if (!rfkill->hard_block_reasons)
+			rfkill->state &= ~RFKILL_BLOCK_HW;
+	}
+	ret = !!(rfkill->state & RFKILL_BLOCK_ANY);
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+
+	rfkill_led_trigger_event(rfkill);
+	rfkill_global_led_trigger_event();
+
+	if (rfkill->registered && prev != blocked)
+		schedule_work(&rfkill->uevent_work);
+
+	return ret;
+}
+EXPORT_SYMBOL(rfkill_set_hw_state_reason);
+
+static void __rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
+{
+	u32 bit = RFKILL_BLOCK_SW;
+
+	/* if in a ops->set_block right now, use other bit */
+	if (rfkill->state & RFKILL_BLOCK_SW_SETCALL)
+		bit = RFKILL_BLOCK_SW_PREV;
+
+	if (blocked)
+		rfkill->state |= bit;
+	else
+		rfkill->state &= ~bit;
+}
+
+bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
+{
+	unsigned long flags;
+	bool prev, hwblock;
+
+	BUG_ON(!rfkill);
+
+	spin_lock_irqsave(&rfkill->lock, flags);
+	prev = !!(rfkill->state & RFKILL_BLOCK_SW);
+	__rfkill_set_sw_state(rfkill, blocked);
+	hwblock = !!(rfkill->state & RFKILL_BLOCK_HW);
+	blocked = blocked || hwblock;
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+
+	if (!rfkill->registered)
+		return blocked;
+
+	if (prev != blocked && !hwblock)
+		schedule_work(&rfkill->uevent_work);
+
+	rfkill_led_trigger_event(rfkill);
+	rfkill_global_led_trigger_event();
+
+	return blocked;
+}
+EXPORT_SYMBOL(rfkill_set_sw_state);
+
+void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked)
+{
+	unsigned long flags;
+
+	BUG_ON(!rfkill);
+	BUG_ON(rfkill->registered);
+
+	spin_lock_irqsave(&rfkill->lock, flags);
+	__rfkill_set_sw_state(rfkill, blocked);
+	rfkill->persistent = true;
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+}
+EXPORT_SYMBOL(rfkill_init_sw_state);
+
+void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
+{
+	unsigned long flags;
+	bool swprev, hwprev;
+
+	BUG_ON(!rfkill);
+
+	spin_lock_irqsave(&rfkill->lock, flags);
+
+	/*
+	 * No need to care about prev/setblock ... this is for uevent only
+	 * and that will get triggered by rfkill_set_block anyway.
+	 */
+	swprev = !!(rfkill->state & RFKILL_BLOCK_SW);
+	hwprev = !!(rfkill->state & RFKILL_BLOCK_HW);
+	__rfkill_set_sw_state(rfkill, sw);
+	if (hw)
+		rfkill->state |= RFKILL_BLOCK_HW;
+	else
+		rfkill->state &= ~RFKILL_BLOCK_HW;
+
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+
+	if (!rfkill->registered) {
+		rfkill->persistent = true;
+	} else {
+		if (swprev != sw || hwprev != hw)
+			schedule_work(&rfkill->uevent_work);
+
+		rfkill_led_trigger_event(rfkill);
+		rfkill_global_led_trigger_event();
+	}
+}
+EXPORT_SYMBOL(rfkill_set_states);
+
+static const char * const rfkill_types[] = {
+	NULL, /* RFKILL_TYPE_ALL */
+	"wlan",
+	"bluetooth",
+	"ultrawideband",
+	"wimax",
+	"wwan",
+	"gps",
+	"fm",
+	"nfc",
+};
+
+enum rfkill_type rfkill_find_type(const char *name)
+{
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(rfkill_types) != NUM_RFKILL_TYPES);
+
+	if (!name)
+		return RFKILL_TYPE_ALL;
+
+	for (i = 1; i < NUM_RFKILL_TYPES; i++)
+		if (!strcmp(name, rfkill_types[i]))
+			return i;
+	return RFKILL_TYPE_ALL;
+}
+EXPORT_SYMBOL(rfkill_find_type);
+
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	return sysfs_emit(buf, "%s\n", rfkill->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static ssize_t type_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	return sysfs_emit(buf, "%s\n", rfkill_types[rfkill->type]);
+}
+static DEVICE_ATTR_RO(type);
+
+static ssize_t index_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	return sysfs_emit(buf, "%d\n", rfkill->idx);
+}
+static DEVICE_ATTR_RO(index);
+
+static ssize_t persistent_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	return sysfs_emit(buf, "%d\n", rfkill->persistent);
+}
+static DEVICE_ATTR_RO(persistent);
+
+static ssize_t hard_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	return sysfs_emit(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_HW) ? 1 : 0);
+}
+static DEVICE_ATTR_RO(hard);
+
+static ssize_t soft_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	mutex_lock(&rfkill_global_mutex);
+	rfkill_sync(rfkill);
+	mutex_unlock(&rfkill_global_mutex);
+
+	return sysfs_emit(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_SW) ? 1 : 0);
+}
+
+static ssize_t soft_store(struct device *dev, struct device_attribute *attr,
+			  const char *buf, size_t count)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+	unsigned long state;
+	int err;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	err = kstrtoul(buf, 0, &state);
+	if (err)
+		return err;
+
+	if (state > 1 )
+		return -EINVAL;
+
+	mutex_lock(&rfkill_global_mutex);
+	rfkill_sync(rfkill);
+	rfkill_set_block(rfkill, state);
+	mutex_unlock(&rfkill_global_mutex);
+
+	return count;
+}
+static DEVICE_ATTR_RW(soft);
+
+static ssize_t hard_block_reasons_show(struct device *dev,
+				       struct device_attribute *attr,
+				       char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	return sysfs_emit(buf, "0x%lx\n", rfkill->hard_block_reasons);
+}
+static DEVICE_ATTR_RO(hard_block_reasons);
+
+static u8 user_state_from_blocked(unsigned long state)
+{
+	if (state & RFKILL_BLOCK_HW)
+		return RFKILL_USER_STATE_HARD_BLOCKED;
+	if (state & RFKILL_BLOCK_SW)
+		return RFKILL_USER_STATE_SOFT_BLOCKED;
+
+	return RFKILL_USER_STATE_UNBLOCKED;
+}
+
+static ssize_t state_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	mutex_lock(&rfkill_global_mutex);
+	rfkill_sync(rfkill);
+	mutex_unlock(&rfkill_global_mutex);
+
+	return sysfs_emit(buf, "%d\n", user_state_from_blocked(rfkill->state));
+}
+
+static ssize_t state_store(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+	unsigned long state;
+	int err;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	err = kstrtoul(buf, 0, &state);
+	if (err)
+		return err;
+
+	if (state != RFKILL_USER_STATE_SOFT_BLOCKED &&
+	    state != RFKILL_USER_STATE_UNBLOCKED)
+		return -EINVAL;
+
+	mutex_lock(&rfkill_global_mutex);
+	rfkill_sync(rfkill);
+	rfkill_set_block(rfkill, state == RFKILL_USER_STATE_SOFT_BLOCKED);
+	mutex_unlock(&rfkill_global_mutex);
+
+	return count;
+}
+static DEVICE_ATTR_RW(state);
+
+static struct attribute *rfkill_dev_attrs[] = {
+	&dev_attr_name.attr,
+	&dev_attr_type.attr,
+	&dev_attr_index.attr,
+	&dev_attr_persistent.attr,
+	&dev_attr_state.attr,
+	&dev_attr_soft.attr,
+	&dev_attr_hard.attr,
+	&dev_attr_hard_block_reasons.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(rfkill_dev);
+
+static void rfkill_release(struct device *dev)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	kfree(rfkill);
+}
+
+static int rfkill_dev_uevent(const struct device *dev, struct kobj_uevent_env *env)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+	unsigned long flags;
+	unsigned long reasons;
+	u32 state;
+	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_types[rfkill->type]);
+	if (error)
+		return error;
+	spin_lock_irqsave(&rfkill->lock, flags);
+	state = rfkill->state;
+	reasons = rfkill->hard_block_reasons;
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+	error = add_uevent_var(env, "RFKILL_STATE=%d",
+			       user_state_from_blocked(state));
+	if (error)
+		return error;
+	return add_uevent_var(env, "RFKILL_HW_BLOCK_REASON=0x%lx", reasons);
+}
+
+void rfkill_pause_polling(struct rfkill *rfkill)
+{
+	BUG_ON(!rfkill);
+
+	if (!rfkill->ops->poll)
+		return;
+
+	rfkill->polling_paused = true;
+	cancel_delayed_work_sync(&rfkill->poll_work);
+}
+EXPORT_SYMBOL(rfkill_pause_polling);
+
+void rfkill_resume_polling(struct rfkill *rfkill)
+{
+	BUG_ON(!rfkill);
+
+	if (!rfkill->ops->poll)
+		return;
+
+	rfkill->polling_paused = false;
+
+	if (rfkill->suspended)
+		return;
+
+	queue_delayed_work(system_power_efficient_wq,
+			   &rfkill->poll_work, 0);
+}
+EXPORT_SYMBOL(rfkill_resume_polling);
+
+#ifdef CONFIG_PM_SLEEP
+static int rfkill_suspend(struct device *dev)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	rfkill->suspended = true;
+	cancel_delayed_work_sync(&rfkill->poll_work);
+
+	return 0;
+}
+
+static int rfkill_resume(struct device *dev)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+	bool cur;
+
+	rfkill->suspended = false;
+
+	if (!rfkill->registered)
+		return 0;
+
+	if (!rfkill->persistent) {
+		cur = !!(rfkill->state & RFKILL_BLOCK_SW);
+		rfkill_set_block(rfkill, cur);
+	}
+
+	if (rfkill->ops->poll && !rfkill->polling_paused)
+		queue_delayed_work(system_power_efficient_wq,
+				   &rfkill->poll_work, 0);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(rfkill_pm_ops, rfkill_suspend, rfkill_resume);
+#define RFKILL_PM_OPS (&rfkill_pm_ops)
+#else
+#define RFKILL_PM_OPS NULL
+#endif
+
+static struct class rfkill_class = {
+	.name		= "rfkill",
+	.dev_release	= rfkill_release,
+	.dev_groups	= rfkill_dev_groups,
+	.dev_uevent	= rfkill_dev_uevent,
+	.pm		= RFKILL_PM_OPS,
+};
+
+bool rfkill_blocked(struct rfkill *rfkill)
+{
+	unsigned long flags;
+	u32 state;
+
+	spin_lock_irqsave(&rfkill->lock, flags);
+	state = rfkill->state;
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+
+	return !!(state & RFKILL_BLOCK_ANY);
+}
+EXPORT_SYMBOL(rfkill_blocked);
+
+bool rfkill_soft_blocked(struct rfkill *rfkill)
+{
+	unsigned long flags;
+	u32 state;
+
+	spin_lock_irqsave(&rfkill->lock, flags);
+	state = rfkill->state;
+	spin_unlock_irqrestore(&rfkill->lock, flags);
+
+	return !!(state & RFKILL_BLOCK_SW);
+}
+EXPORT_SYMBOL(rfkill_soft_blocked);
+
+struct rfkill * __must_check rfkill_alloc(const char *name,
+					  struct device *parent,
+					  const enum rfkill_type type,
+					  const struct rfkill_ops *ops,
+					  void *ops_data)
+{
+	struct rfkill *rfkill;
+	struct device *dev;
+	size_t name_len;
+
+	if (WARN_ON(!ops))
+		return NULL;
+
+	if (WARN_ON(!ops->set_block))
+		return NULL;
+
+	if (WARN_ON(!name))
+		return NULL;
+
+	if (WARN_ON(type == RFKILL_TYPE_ALL || type >= NUM_RFKILL_TYPES))
+		return NULL;
+
+	name_len = strlen(name);
+	rfkill = kzalloc(sizeof(*rfkill) + name_len + 1, GFP_KERNEL);
+	if (!rfkill)
+		return NULL;
+
+	spin_lock_init(&rfkill->lock);
+	INIT_LIST_HEAD(&rfkill->node);
+	rfkill->type = type;
+	memcpy(rfkill->name, name, name_len);
+	rfkill->ops = ops;
+	rfkill->data = ops_data;
+
+	dev = &rfkill->dev;
+	dev->class = &rfkill_class;
+	dev->parent = parent;
+	device_initialize(dev);
+
+	return rfkill;
+}
+EXPORT_SYMBOL(rfkill_alloc);
+
+static void rfkill_poll(struct work_struct *work)
+{
+	struct rfkill *rfkill;
+
+	rfkill = container_of(work, struct rfkill, poll_work.work);
+
+	/*
+	 * Poll hardware state -- driver will use one of the
+	 * rfkill_set{,_hw,_sw}_state functions and use its
+	 * return value to update the current status.
+	 */
+	rfkill->ops->poll(rfkill, rfkill->data);
+
+	queue_delayed_work(system_power_efficient_wq,
+		&rfkill->poll_work,
+		round_jiffies_relative(POLL_INTERVAL));
+}
+
+static void rfkill_uevent_work(struct work_struct *work)
+{
+	struct rfkill *rfkill;
+
+	rfkill = container_of(work, struct rfkill, uevent_work);
+
+	mutex_lock(&rfkill_global_mutex);
+	rfkill_event(rfkill);
+	mutex_unlock(&rfkill_global_mutex);
+}
+
+static void rfkill_sync_work(struct work_struct *work)
+{
+	struct rfkill *rfkill = container_of(work, struct rfkill, sync_work);
+
+	mutex_lock(&rfkill_global_mutex);
+	rfkill_sync(rfkill);
+	mutex_unlock(&rfkill_global_mutex);
+}
+
+int __must_check rfkill_register(struct rfkill *rfkill)
+{
+	static unsigned long rfkill_no;
+	struct device *dev;
+	int error;
+
+	if (!rfkill)
+		return -EINVAL;
+
+	dev = &rfkill->dev;
+
+	mutex_lock(&rfkill_global_mutex);
+
+	if (rfkill->registered) {
+		error = -EALREADY;
+		goto unlock;
+	}
+
+	rfkill->idx = rfkill_no;
+	dev_set_name(dev, "rfkill%lu", rfkill_no);
+	rfkill_no++;
+
+	list_add_tail(&rfkill->node, &rfkill_list);
+
+	error = device_add(dev);
+	if (error)
+		goto remove;
+
+	error = rfkill_led_trigger_register(rfkill);
+	if (error)
+		goto devdel;
+
+	rfkill->registered = true;
+
+	INIT_DELAYED_WORK(&rfkill->poll_work, rfkill_poll);
+	INIT_WORK(&rfkill->uevent_work, rfkill_uevent_work);
+	INIT_WORK(&rfkill->sync_work, rfkill_sync_work);
+
+	if (rfkill->ops->poll)
+		queue_delayed_work(system_power_efficient_wq,
+			&rfkill->poll_work,
+			round_jiffies_relative(POLL_INTERVAL));
+
+	if (!rfkill->persistent || rfkill_epo_lock_active) {
+		rfkill->need_sync = true;
+		schedule_work(&rfkill->sync_work);
+	} else {
+#ifdef CONFIG_RFKILL_INPUT
+		bool soft_blocked = !!(rfkill->state & RFKILL_BLOCK_SW);
+
+		if (!atomic_read(&rfkill_input_disabled))
+			__rfkill_switch_all(rfkill->type, soft_blocked);
+#endif
+	}
+
+	rfkill_global_led_trigger_event();
+	rfkill_send_events(rfkill, RFKILL_OP_ADD);
+
+	mutex_unlock(&rfkill_global_mutex);
+	return 0;
+
+ devdel:
+	device_del(&rfkill->dev);
+ remove:
+	list_del_init(&rfkill->node);
+ unlock:
+	mutex_unlock(&rfkill_global_mutex);
+	return error;
+}
+EXPORT_SYMBOL(rfkill_register);
+
+void rfkill_unregister(struct rfkill *rfkill)
+{
+	BUG_ON(!rfkill);
+
+	if (rfkill->ops->poll)
+		cancel_delayed_work_sync(&rfkill->poll_work);
+
+	cancel_work_sync(&rfkill->uevent_work);
+	cancel_work_sync(&rfkill->sync_work);
+
+	rfkill->registered = false;
+
+	device_del(&rfkill->dev);
+
+	mutex_lock(&rfkill_global_mutex);
+	rfkill_send_events(rfkill, RFKILL_OP_DEL);
+	list_del_init(&rfkill->node);
+	rfkill_global_led_trigger_event();
+	mutex_unlock(&rfkill_global_mutex);
+
+	rfkill_led_trigger_unregister(rfkill);
+}
+EXPORT_SYMBOL(rfkill_unregister);
+
+void rfkill_destroy(struct rfkill *rfkill)
+{
+	if (rfkill)
+		put_device(&rfkill->dev);
+}
+EXPORT_SYMBOL(rfkill_destroy);
+
+static int rfkill_fop_open(struct inode *inode, struct file *file)
+{
+	struct rfkill_data *data;
+	struct rfkill *rfkill;
+	struct rfkill_int_event *ev, *tmp;
+
+	data = kzalloc_obj(*data);
+	if (!data)
+		return -ENOMEM;
+
+	data->max_size = RFKILL_EVENT_SIZE_V1;
+
+	INIT_LIST_HEAD(&data->events);
+	mutex_init(&data->mtx);
+	init_waitqueue_head(&data->read_wait);
+
+	mutex_lock(&rfkill_global_mutex);
+	/*
+	 * start getting events from elsewhere but hold mtx to get
+	 * startup events added first
+	 */
+
+	list_for_each_entry(rfkill, &rfkill_list, node) {
+		ev = kzalloc_obj(*ev);
+		if (!ev)
+			goto free;
+		rfkill_sync(rfkill);
+		if (rfkill_fill_event(ev, rfkill, data, RFKILL_OP_ADD))
+			kfree(ev);
+	}
+	list_add(&data->list, &rfkill_fds);
+	mutex_unlock(&rfkill_global_mutex);
+
+	file->private_data = data;
+
+	return stream_open(inode, file);
+
+ free:
+	mutex_unlock(&rfkill_global_mutex);
+	mutex_destroy(&data->mtx);
+	list_for_each_entry_safe(ev, tmp, &data->events, list)
+		kfree(ev);
+	kfree(data);
+	return -ENOMEM;
+}
+
+static __poll_t rfkill_fop_poll(struct file *file, poll_table *wait)
+{
+	struct rfkill_data *data = file->private_data;
+	__poll_t res = EPOLLOUT | EPOLLWRNORM;
+
+	poll_wait(file, &data->read_wait, wait);
+
+	mutex_lock(&data->mtx);
+	if (!list_empty(&data->events))
+		res = EPOLLIN | EPOLLRDNORM;
+	mutex_unlock(&data->mtx);
+
+	return res;
+}
+
+static ssize_t rfkill_fop_read(struct file *file, char __user *buf,
+			       size_t count, loff_t *pos)
+{
+	struct rfkill_data *data = file->private_data;
+	struct rfkill_int_event *ev;
+	unsigned long sz;
+	int ret;
+
+	mutex_lock(&data->mtx);
+
+	while (list_empty(&data->events)) {
+		if (file->f_flags & O_NONBLOCK) {
+			ret = -EAGAIN;
+			goto out;
+		}
+		mutex_unlock(&data->mtx);
+		/* since we re-check and it just compares pointers,
+		 * using !list_empty() without locking isn't a problem
+		 */
+		ret = wait_event_interruptible(data->read_wait,
+					       !list_empty(&data->events));
+		mutex_lock(&data->mtx);
+
+		if (ret)
+			goto out;
+	}
+
+	ev = list_first_entry(&data->events, struct rfkill_int_event,
+				list);
+
+	sz = min_t(unsigned long, sizeof(ev->ev), count);
+	sz = min_t(unsigned long, sz, data->max_size);
+	ret = sz;
+	if (copy_to_user(buf, &ev->ev, sz))
+		ret = -EFAULT;
+
+	list_del(&ev->list);
+	data->event_count--;
+	kfree(ev);
+ out:
+	mutex_unlock(&data->mtx);
+	return ret;
+}
+
+static ssize_t rfkill_fop_write(struct file *file, const char __user *buf,
+				size_t count, loff_t *pos)
+{
+	struct rfkill_data *data = file->private_data;
+	struct rfkill *rfkill;
+	struct rfkill_event_ext ev;
+	int ret;
+
+	/* we don't need the 'hard' variable but accept it */
+	if (count < RFKILL_EVENT_SIZE_V1 - 1)
+		return -EINVAL;
+
+	/*
+	 * Copy as much data as we can accept into our 'ev' buffer,
+	 * but tell userspace how much we've copied so it can determine
+	 * our API version even in a write() call, if it cares.
+	 */
+	count = min(count, sizeof(ev));
+	count = min_t(size_t, count, data->max_size);
+	if (copy_from_user(&ev, buf, count))
+		return -EFAULT;
+
+	if (ev.type >= NUM_RFKILL_TYPES)
+		return -EINVAL;
+
+	mutex_lock(&rfkill_global_mutex);
+
+	switch (ev.op) {
+	case RFKILL_OP_CHANGE_ALL:
+		rfkill_update_global_state(ev.type, ev.soft);
+		list_for_each_entry(rfkill, &rfkill_list, node)
+			if (rfkill->type == ev.type ||
+			    ev.type == RFKILL_TYPE_ALL)
+				rfkill_set_block(rfkill, ev.soft);
+		ret = 0;
+		break;
+	case RFKILL_OP_CHANGE:
+		list_for_each_entry(rfkill, &rfkill_list, node)
+			if (rfkill->idx == ev.idx &&
+			    (rfkill->type == ev.type ||
+			     ev.type == RFKILL_TYPE_ALL))
+				rfkill_set_block(rfkill, ev.soft);
+		ret = 0;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	mutex_unlock(&rfkill_global_mutex);
+
+	return ret ?: count;
+}
+
+static int rfkill_fop_release(struct inode *inode, struct file *file)
+{
+	struct rfkill_data *data = file->private_data;
+	struct rfkill_int_event *ev, *tmp;
+
+	mutex_lock(&rfkill_global_mutex);
+	list_del(&data->list);
+	mutex_unlock(&rfkill_global_mutex);
+
+	mutex_destroy(&data->mtx);
+	list_for_each_entry_safe(ev, tmp, &data->events, list)
+		kfree(ev);
+
+#ifdef CONFIG_RFKILL_INPUT
+	if (data->input_handler)
+		if (atomic_dec_return(&rfkill_input_disabled) == 0)
+			printk(KERN_DEBUG "rfkill: input handler enabled\n");
+#endif
+
+	kfree(data);
+
+	return 0;
+}
+
+static long rfkill_fop_ioctl(struct file *file, unsigned int cmd,
+			     unsigned long arg)
+{
+	struct rfkill_data *data = file->private_data;
+	int ret = -ENOTTY;
+	u32 size;
+
+	if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC)
+		return -ENOTTY;
+
+	mutex_lock(&data->mtx);
+	switch (_IOC_NR(cmd)) {
+#ifdef CONFIG_RFKILL_INPUT
+	case RFKILL_IOC_NOINPUT:
+		if (!data->input_handler) {
+			if (atomic_inc_return(&rfkill_input_disabled) == 1)
+				printk(KERN_DEBUG "rfkill: input handler disabled\n");
+			data->input_handler = true;
+		}
+		ret = 0;
+		break;
+#endif
+	case RFKILL_IOC_MAX_SIZE:
+		if (get_user(size, (__u32 __user *)arg)) {
+			ret = -EFAULT;
+			break;
+		}
+		if (size < RFKILL_EVENT_SIZE_V1 || size > U8_MAX) {
+			ret = -EINVAL;
+			break;
+		}
+		data->max_size = size;
+		ret = 0;
+		break;
+	default:
+		break;
+	}
+	mutex_unlock(&data->mtx);
+
+	return ret;
+}
+
+static const struct file_operations rfkill_fops = {
+	.owner		= THIS_MODULE,
+	.open		= rfkill_fop_open,
+	.read		= rfkill_fop_read,
+	.write		= rfkill_fop_write,
+	.poll		= rfkill_fop_poll,
+	.release	= rfkill_fop_release,
+	.unlocked_ioctl	= rfkill_fop_ioctl,
+	.compat_ioctl	= compat_ptr_ioctl,
+};
+
+#define RFKILL_NAME "rfkill"
+
+static struct miscdevice rfkill_miscdev = {
+	.fops	= &rfkill_fops,
+	.name	= RFKILL_NAME,
+	.minor	= RFKILL_MINOR,
+};
+
+static int __init rfkill_init(void)
+{
+	int error;
+
+	rfkill_update_global_state(RFKILL_TYPE_ALL, !rfkill_default_state);
+
+	error = class_register(&rfkill_class);
+	if (error)
+		goto error_class;
+
+	error = misc_register(&rfkill_miscdev);
+	if (error)
+		goto error_misc;
+
+	error = rfkill_global_led_trigger_register();
+	if (error)
+		goto error_led_trigger;
+
+#ifdef CONFIG_RFKILL_INPUT
+	error = rfkill_handler_init();
+	if (error)
+		goto error_input;
+#endif
+
+	return 0;
+
+#ifdef CONFIG_RFKILL_INPUT
+error_input:
+	rfkill_global_led_trigger_unregister();
+#endif
+error_led_trigger:
+	misc_deregister(&rfkill_miscdev);
+error_misc:
+	class_unregister(&rfkill_class);
+error_class:
+	return error;
+}
+subsys_initcall(rfkill_init);
+
+static void __exit rfkill_exit(void)
+{
+#ifdef CONFIG_RFKILL_INPUT
+	rfkill_handler_exit();
+#endif
+	rfkill_global_led_trigger_unregister();
+	misc_deregister(&rfkill_miscdev);
+	class_unregister(&rfkill_class);
+}
+module_exit(rfkill_exit);
+
+MODULE_ALIAS_MISCDEV(RFKILL_MINOR);
+MODULE_ALIAS("devname:" RFKILL_NAME);
diff --git a/net/rfkill/input.c b/net/rfkill/input.c
new file mode 100644
index 000000000..f7cb24ce7
--- /dev/null
+++ b/net/rfkill/input.c
@@ -0,0 +1,343 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Input layer to RF Kill interface connector
+ *
+ * Copyright (c) 2007 Dmitry Torokhov
+ * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * If you ever run into a situation in which you have a SW_ type rfkill
+ * input device, then you can revive code that was removed in the patch
+ * "rfkill-input: remove unused code".
+ */
+
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/moduleparam.h>
+#include <linux/workqueue.h>
+#include <linux/init.h>
+#include <linux/rfkill.h>
+#include <linux/sched.h>
+
+#include "rfkill.h"
+
+enum rfkill_input_master_mode {
+	RFKILL_INPUT_MASTER_UNLOCK = 0,
+	RFKILL_INPUT_MASTER_RESTORE = 1,
+	RFKILL_INPUT_MASTER_UNBLOCKALL = 2,
+	NUM_RFKILL_INPUT_MASTER_MODES
+};
+
+/* Delay (in ms) between consecutive switch ops */
+#define RFKILL_OPS_DELAY 200
+
+static enum rfkill_input_master_mode rfkill_master_switch_mode =
+					RFKILL_INPUT_MASTER_UNBLOCKALL;
+module_param_named(master_switch_mode, rfkill_master_switch_mode, uint, 0);
+MODULE_PARM_DESC(master_switch_mode,
+	"SW_RFKILL_ALL ON should: 0=do nothing (only unlock); 1=restore; 2=unblock all");
+
+static DEFINE_SPINLOCK(rfkill_op_lock);
+static bool rfkill_op_pending;
+static unsigned long rfkill_sw_pending[BITS_TO_LONGS(NUM_RFKILL_TYPES)];
+static unsigned long rfkill_sw_state[BITS_TO_LONGS(NUM_RFKILL_TYPES)];
+
+enum rfkill_sched_op {
+	RFKILL_GLOBAL_OP_EPO = 0,
+	RFKILL_GLOBAL_OP_RESTORE,
+	RFKILL_GLOBAL_OP_UNLOCK,
+	RFKILL_GLOBAL_OP_UNBLOCK,
+};
+
+static enum rfkill_sched_op rfkill_master_switch_op;
+static enum rfkill_sched_op rfkill_op;
+
+static void __rfkill_handle_global_op(enum rfkill_sched_op op)
+{
+	unsigned int i;
+
+	switch (op) {
+	case RFKILL_GLOBAL_OP_EPO:
+		rfkill_epo();
+		break;
+	case RFKILL_GLOBAL_OP_RESTORE:
+		rfkill_restore_states();
+		break;
+	case RFKILL_GLOBAL_OP_UNLOCK:
+		rfkill_remove_epo_lock();
+		break;
+	case RFKILL_GLOBAL_OP_UNBLOCK:
+		rfkill_remove_epo_lock();
+		for (i = 0; i < NUM_RFKILL_TYPES; i++)
+			rfkill_switch_all(i, false);
+		break;
+	default:
+		/* memory corruption or bug, fail safely */
+		rfkill_epo();
+		WARN(1, "Unknown requested operation %d! "
+			"rfkill Emergency Power Off activated\n",
+			op);
+	}
+}
+
+static void __rfkill_handle_normal_op(const enum rfkill_type type,
+				      const bool complement)
+{
+	bool blocked;
+
+	blocked = rfkill_get_global_sw_state(type);
+	if (complement)
+		blocked = !blocked;
+
+	rfkill_switch_all(type, blocked);
+}
+
+static void rfkill_op_handler(struct work_struct *work)
+{
+	unsigned int i;
+	bool c;
+
+	spin_lock_irq(&rfkill_op_lock);
+	do {
+		if (rfkill_op_pending) {
+			enum rfkill_sched_op op = rfkill_op;
+			rfkill_op_pending = false;
+			memset(rfkill_sw_pending, 0,
+				sizeof(rfkill_sw_pending));
+			spin_unlock_irq(&rfkill_op_lock);
+
+			__rfkill_handle_global_op(op);
+
+			spin_lock_irq(&rfkill_op_lock);
+
+			/*
+			 * handle global ops first -- during unlocked period
+			 * we might have gotten a new global op.
+			 */
+			if (rfkill_op_pending)
+				continue;
+		}
+
+		if (rfkill_is_epo_lock_active())
+			continue;
+
+		for (i = 0; i < NUM_RFKILL_TYPES; i++) {
+			if (__test_and_clear_bit(i, rfkill_sw_pending)) {
+				c = __test_and_clear_bit(i, rfkill_sw_state);
+				spin_unlock_irq(&rfkill_op_lock);
+
+				__rfkill_handle_normal_op(i, c);
+
+				spin_lock_irq(&rfkill_op_lock);
+			}
+		}
+	} while (rfkill_op_pending);
+	spin_unlock_irq(&rfkill_op_lock);
+}
+
+static DECLARE_DELAYED_WORK(rfkill_op_work, rfkill_op_handler);
+static unsigned long rfkill_last_scheduled;
+
+static unsigned long rfkill_ratelimit(const unsigned long last)
+{
+	const unsigned long delay = msecs_to_jiffies(RFKILL_OPS_DELAY);
+	return time_after(jiffies, last + delay) ? 0 : delay;
+}
+
+static void rfkill_schedule_ratelimited(void)
+{
+	if (schedule_delayed_work(&rfkill_op_work,
+				  rfkill_ratelimit(rfkill_last_scheduled)))
+		rfkill_last_scheduled = jiffies;
+}
+
+static void rfkill_schedule_global_op(enum rfkill_sched_op op)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&rfkill_op_lock, flags);
+	rfkill_op = op;
+	rfkill_op_pending = true;
+	if (op == RFKILL_GLOBAL_OP_EPO && !rfkill_is_epo_lock_active()) {
+		/* bypass the limiter for EPO */
+		mod_delayed_work(system_percpu_wq, &rfkill_op_work, 0);
+		rfkill_last_scheduled = jiffies;
+	} else
+		rfkill_schedule_ratelimited();
+	spin_unlock_irqrestore(&rfkill_op_lock, flags);
+}
+
+static void rfkill_schedule_toggle(enum rfkill_type type)
+{
+	unsigned long flags;
+
+	if (rfkill_is_epo_lock_active())
+		return;
+
+	spin_lock_irqsave(&rfkill_op_lock, flags);
+	if (!rfkill_op_pending) {
+		__set_bit(type, rfkill_sw_pending);
+		__change_bit(type, rfkill_sw_state);
+		rfkill_schedule_ratelimited();
+	}
+	spin_unlock_irqrestore(&rfkill_op_lock, flags);
+}
+
+static void rfkill_schedule_evsw_rfkillall(int state)
+{
+	if (state)
+		rfkill_schedule_global_op(rfkill_master_switch_op);
+	else
+		rfkill_schedule_global_op(RFKILL_GLOBAL_OP_EPO);
+}
+
+static void rfkill_event(struct input_handle *handle, unsigned int type,
+			unsigned int code, int data)
+{
+	if (type == EV_KEY && data == 1) {
+		switch (code) {
+		case KEY_WLAN:
+			rfkill_schedule_toggle(RFKILL_TYPE_WLAN);
+			break;
+		case KEY_BLUETOOTH:
+			rfkill_schedule_toggle(RFKILL_TYPE_BLUETOOTH);
+			break;
+		case KEY_UWB:
+			rfkill_schedule_toggle(RFKILL_TYPE_UWB);
+			break;
+		case KEY_WIMAX:
+			rfkill_schedule_toggle(RFKILL_TYPE_WIMAX);
+			break;
+		case KEY_RFKILL:
+			rfkill_schedule_toggle(RFKILL_TYPE_ALL);
+			break;
+		}
+	} else if (type == EV_SW && code == SW_RFKILL_ALL)
+		rfkill_schedule_evsw_rfkillall(data);
+}
+
+static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
+			  const struct input_device_id *id)
+{
+	struct input_handle *handle;
+	int error;
+
+	handle = kzalloc_obj(struct input_handle);
+	if (!handle)
+		return -ENOMEM;
+
+	handle->dev = dev;
+	handle->handler = handler;
+	handle->name = "rfkill";
+
+	/* causes rfkill_start() to be called */
+	error = input_register_handle(handle);
+	if (error)
+		goto err_free_handle;
+
+	error = input_open_device(handle);
+	if (error)
+		goto err_unregister_handle;
+
+	return 0;
+
+ err_unregister_handle:
+	input_unregister_handle(handle);
+ err_free_handle:
+	kfree(handle);
+	return error;
+}
+
+static void rfkill_start(struct input_handle *handle)
+{
+	/*
+	 * Take event_lock to guard against configuration changes, we
+	 * should be able to deal with concurrency with rfkill_event()
+	 * just fine (which event_lock will also avoid).
+	 */
+	spin_lock_irq(&handle->dev->event_lock);
+
+	if (test_bit(EV_SW, handle->dev->evbit) &&
+	    test_bit(SW_RFKILL_ALL, handle->dev->swbit))
+		rfkill_schedule_evsw_rfkillall(test_bit(SW_RFKILL_ALL,
+							handle->dev->sw));
+
+	spin_unlock_irq(&handle->dev->event_lock);
+}
+
+static void rfkill_disconnect(struct input_handle *handle)
+{
+	input_close_device(handle);
+	input_unregister_handle(handle);
+	kfree(handle);
+}
+
+static const struct input_device_id rfkill_ids[] = {
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+		.evbit = { BIT_MASK(EV_KEY) },
+		.keybit = { [BIT_WORD(KEY_WLAN)] = BIT_MASK(KEY_WLAN) },
+	},
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+		.evbit = { BIT_MASK(EV_KEY) },
+		.keybit = { [BIT_WORD(KEY_BLUETOOTH)] = BIT_MASK(KEY_BLUETOOTH) },
+	},
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+		.evbit = { BIT_MASK(EV_KEY) },
+		.keybit = { [BIT_WORD(KEY_UWB)] = BIT_MASK(KEY_UWB) },
+	},
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+		.evbit = { BIT_MASK(EV_KEY) },
+		.keybit = { [BIT_WORD(KEY_WIMAX)] = BIT_MASK(KEY_WIMAX) },
+	},
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+		.evbit = { BIT_MASK(EV_KEY) },
+		.keybit = { [BIT_WORD(KEY_RFKILL)] = BIT_MASK(KEY_RFKILL) },
+	},
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_SWBIT,
+		.evbit = { BIT(EV_SW) },
+		.swbit = { [BIT_WORD(SW_RFKILL_ALL)] = BIT_MASK(SW_RFKILL_ALL) },
+	},
+	{ }
+};
+
+static struct input_handler rfkill_handler = {
+	.name =	"rfkill",
+	.event = rfkill_event,
+	.connect = rfkill_connect,
+	.start = rfkill_start,
+	.disconnect = rfkill_disconnect,
+	.id_table = rfkill_ids,
+};
+
+int __init rfkill_handler_init(void)
+{
+	switch (rfkill_master_switch_mode) {
+	case RFKILL_INPUT_MASTER_UNBLOCKALL:
+		rfkill_master_switch_op = RFKILL_GLOBAL_OP_UNBLOCK;
+		break;
+	case RFKILL_INPUT_MASTER_RESTORE:
+		rfkill_master_switch_op = RFKILL_GLOBAL_OP_RESTORE;
+		break;
+	case RFKILL_INPUT_MASTER_UNLOCK:
+		rfkill_master_switch_op = RFKILL_GLOBAL_OP_UNLOCK;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Avoid delay at first schedule */
+	rfkill_last_scheduled =
+			jiffies - msecs_to_jiffies(RFKILL_OPS_DELAY) - 1;
+	return input_register_handler(&rfkill_handler);
+}
+
+void __exit rfkill_handler_exit(void)
+{
+	input_unregister_handler(&rfkill_handler);
+	cancel_delayed_work_sync(&rfkill_op_work);
+}
diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
new file mode 100644
index 000000000..9c5b695db
--- /dev/null
+++ b/net/rfkill/rfkill-gpio.c
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2011, NVIDIA Corporation.
+ */
+
+#include <linux/dmi.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/rfkill.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+
+struct rfkill_gpio_data {
+	const char		*name;
+	enum rfkill_type	type;
+	struct gpio_desc	*reset_gpio;
+	struct gpio_desc	*shutdown_gpio;
+
+	struct rfkill		*rfkill_dev;
+	struct clk		*clk;
+
+	bool			clk_enabled;
+};
+
+static int rfkill_gpio_set_power(void *data, bool blocked)
+{
+	struct rfkill_gpio_data *rfkill = data;
+
+	if (!blocked && !IS_ERR(rfkill->clk) && !rfkill->clk_enabled) {
+		int ret = clk_enable(rfkill->clk);
+
+		if (ret)
+			return ret;
+	}
+
+	gpiod_set_value_cansleep(rfkill->shutdown_gpio, !blocked);
+	gpiod_set_value_cansleep(rfkill->reset_gpio, !blocked);
+
+	if (blocked && !IS_ERR(rfkill->clk) && rfkill->clk_enabled)
+		clk_disable(rfkill->clk);
+
+	rfkill->clk_enabled = !blocked;
+
+	return 0;
+}
+
+static const struct rfkill_ops rfkill_gpio_ops = {
+	.set_block = rfkill_gpio_set_power,
+};
+
+static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
+static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false };
+
+static const struct acpi_gpio_mapping acpi_rfkill_default_gpios[] = {
+	{ "reset-gpios", &reset_gpios, 1 },
+	{ "shutdown-gpios", &shutdown_gpios, 1 },
+	{ },
+};
+
+static int rfkill_gpio_acpi_probe(struct device *dev,
+				  struct rfkill_gpio_data *rfkill)
+{
+	const struct acpi_device_id *id;
+
+	id = acpi_match_device(dev->driver->acpi_match_table, dev);
+	if (!id)
+		return -ENODEV;
+
+	rfkill->type = (unsigned)id->driver_data;
+
+	return devm_acpi_dev_add_driver_gpios(dev, acpi_rfkill_default_gpios);
+}
+
+/* List of DMI matches for devices on which rfkill-gpio should not load,
+ * to avoid firmware bugs.
+ */
+static const struct dmi_system_id rfkill_gpio_deny_table[] = {
+	{
+		/* Lenovo Yoga Tab 3 Pro YT3-X90, bogus "BCM4752" device in DSDT */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),
+		},
+	},
+	{ }
+};
+
+static int rfkill_gpio_probe(struct platform_device *pdev)
+{
+	struct rfkill_gpio_data *rfkill;
+	const char *type_name = NULL;
+	const char *name_property;
+	const char *type_property;
+	struct gpio_desc *gpio;
+	int ret;
+
+	if (dmi_check_system(rfkill_gpio_deny_table))
+		return -ENODEV;
+
+	rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);
+	if (!rfkill)
+		return -ENOMEM;
+
+	if (dev_of_node(&pdev->dev)) {
+		name_property = "label";
+		type_property = "radio-type";
+	} else {
+		name_property = "name";
+		type_property = "type";
+	}
+	device_property_read_string(&pdev->dev, name_property, &rfkill->name);
+	device_property_read_string(&pdev->dev, type_property, &type_name);
+
+	if (!rfkill->name)
+		rfkill->name = dev_name(&pdev->dev);
+
+	rfkill->type = rfkill_find_type(type_name);
+
+	if (ACPI_HANDLE(&pdev->dev)) {
+		ret = rfkill_gpio_acpi_probe(&pdev->dev, rfkill);
+		if (ret)
+			return ret;
+	}
+
+	rfkill->clk = devm_clk_get(&pdev->dev, NULL);
+
+	gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_ASIS);
+	if (IS_ERR(gpio))
+		return PTR_ERR(gpio);
+
+	rfkill->reset_gpio = gpio;
+
+	gpio = devm_gpiod_get_optional(&pdev->dev, "shutdown", GPIOD_ASIS);
+	if (IS_ERR(gpio))
+		return PTR_ERR(gpio);
+
+	rfkill->shutdown_gpio = gpio;
+
+	/* Make sure at-least one GPIO is defined for this instance */
+	if (!rfkill->reset_gpio && !rfkill->shutdown_gpio) {
+		dev_err(&pdev->dev, "invalid platform data\n");
+		return -EINVAL;
+	}
+
+	ret = gpiod_direction_output(rfkill->reset_gpio, true);
+	if (ret)
+		return ret;
+
+	ret = gpiod_direction_output(rfkill->shutdown_gpio, true);
+	if (ret)
+		return ret;
+
+	rfkill->rfkill_dev = rfkill_alloc(rfkill->name, &pdev->dev,
+					  rfkill->type, &rfkill_gpio_ops,
+					  rfkill);
+	if (!rfkill->rfkill_dev)
+		return -ENOMEM;
+
+	if (device_property_present(&pdev->dev, "default-blocked"))
+		rfkill_init_sw_state(rfkill->rfkill_dev, true);
+
+	ret = rfkill_register(rfkill->rfkill_dev);
+	if (ret < 0)
+		goto err_destroy;
+
+	platform_set_drvdata(pdev, rfkill);
+
+	dev_info(&pdev->dev, "%s device registered.\n", rfkill->name);
+
+	return 0;
+
+err_destroy:
+	rfkill_destroy(rfkill->rfkill_dev);
+
+	return ret;
+}
+
+static void rfkill_gpio_remove(struct platform_device *pdev)
+{
+	struct rfkill_gpio_data *rfkill = platform_get_drvdata(pdev);
+
+	rfkill_unregister(rfkill->rfkill_dev);
+	rfkill_destroy(rfkill->rfkill_dev);
+}
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id rfkill_acpi_match[] = {
+	{ "BCM4752", RFKILL_TYPE_GPS },
+	{ "LNV4752", RFKILL_TYPE_GPS },
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, rfkill_acpi_match);
+#endif
+
+static const struct of_device_id rfkill_of_match[] __maybe_unused = {
+	{ .compatible = "rfkill-gpio", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, rfkill_of_match);
+
+static struct platform_driver rfkill_gpio_driver = {
+	.probe = rfkill_gpio_probe,
+	.remove = rfkill_gpio_remove,
+	.driver = {
+		.name = "rfkill_gpio",
+		.acpi_match_table = ACPI_PTR(rfkill_acpi_match),
+		.of_match_table = of_match_ptr(rfkill_of_match),
+	},
+};
+
+module_platform_driver(rfkill_gpio_driver);
+
+MODULE_DESCRIPTION("gpio rfkill");
+MODULE_AUTHOR("NVIDIA");
+MODULE_LICENSE("GPL");
diff --git a/net/rfkill/rfkill.h b/net/rfkill/rfkill.h
new file mode 100644
index 000000000..001c40caa
--- /dev/null
+++ b/net/rfkill/rfkill.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2007 Ivo van Doorn
+ * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
+ */
+
+
+#ifndef __RFKILL_INPUT_H
+#define __RFKILL_INPUT_H
+
+/* core code */
+void rfkill_switch_all(const enum rfkill_type type, bool blocked);
+void rfkill_epo(void);
+void rfkill_restore_states(void);
+void rfkill_remove_epo_lock(void);
+bool rfkill_is_epo_lock_active(void);
+bool rfkill_get_global_sw_state(const enum rfkill_type type);
+
+/* input handler */
+int rfkill_handler_init(void);
+void rfkill_handler_exit(void);
+
+#endif /* __RFKILL_INPUT_H */