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![Emmanuel Grumbach](/assets/img/avatar_default.png)
The WLAN device may exist yet not be usable. This can happen when the WLAN device is controllable by both the host and some platform internal component. We need some arbritration that is vendor specific, but when the device is not available for the host, we need to reflect this state towards the user space. Add a reason field to the rfkill object (and event) so that userspace can know why the device is in rfkill: because some other platform component currently owns the device, or because the actual hw rfkill signal is asserted. Capable userspace can now determine the reason for the rfkill and possibly do some negotiation on a side band channel using a proprietary protocol to gain ownership on the device in case the device is owned by some other component. When the host gains ownership on the device, the kernel can remove the RFKILL_HARD_BLOCK_NOT_OWNER reason and the hw rfkill state will be off. Then, the userspace can bring the device up and start normal operation. The rfkill_event structure is enlarged to include the additional byte, it is now 9 bytes long. Old user space will ask to read only 8 bytes so that the kernel can know not to feed them with more data. When the user space writes 8 bytes, new kernels will just read what is present in the file descriptor. This new byte is read only from the userspace standpoint anyway. If a new user space uses an old kernel, it'll ask to read 9 bytes but will get only 8, and it'll know that it didn't get the new state. When it'll write 9 bytes, the kernel will again ignore this new byte which is read only from the userspace standpoint. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Link: https://lore.kernel.org/r/20201104134641.28816-1-emmanuel.grumbach@intel.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
1411 lines
32 KiB
C
1411 lines
32 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2006 - 2007 Ivo van Doorn
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* Copyright (C) 2007 Dmitry Torokhov
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* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/workqueue.h>
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#include <linux/capability.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/rfkill.h>
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#include <linux/sched.h>
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#include <linux/spinlock.h>
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#include <linux/device.h>
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#include <linux/miscdevice.h>
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#include <linux/wait.h>
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#include <linux/poll.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include "rfkill.h"
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#define POLL_INTERVAL (5 * HZ)
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#define RFKILL_BLOCK_HW BIT(0)
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#define RFKILL_BLOCK_SW BIT(1)
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#define RFKILL_BLOCK_SW_PREV BIT(2)
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#define RFKILL_BLOCK_ANY (RFKILL_BLOCK_HW |\
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RFKILL_BLOCK_SW |\
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RFKILL_BLOCK_SW_PREV)
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#define RFKILL_BLOCK_SW_SETCALL BIT(31)
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struct rfkill {
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spinlock_t lock;
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enum rfkill_type type;
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unsigned long state;
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unsigned long hard_block_reasons;
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u32 idx;
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bool registered;
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bool persistent;
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bool polling_paused;
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bool suspended;
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const struct rfkill_ops *ops;
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void *data;
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#ifdef CONFIG_RFKILL_LEDS
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struct led_trigger led_trigger;
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const char *ledtrigname;
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#endif
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struct device dev;
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struct list_head node;
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struct delayed_work poll_work;
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struct work_struct uevent_work;
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struct work_struct sync_work;
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char name[];
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};
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#define to_rfkill(d) container_of(d, struct rfkill, dev)
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struct rfkill_int_event {
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struct list_head list;
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struct rfkill_event ev;
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};
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struct rfkill_data {
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struct list_head list;
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struct list_head events;
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struct mutex mtx;
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wait_queue_head_t read_wait;
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bool input_handler;
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};
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MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>");
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MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
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MODULE_DESCRIPTION("RF switch support");
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MODULE_LICENSE("GPL");
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/*
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* The locking here should be made much smarter, we currently have
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* a bit of a stupid situation because drivers might want to register
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* the rfkill struct under their own lock, and take this lock during
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* rfkill method calls -- which will cause an AB-BA deadlock situation.
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*
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* To fix that, we need to rework this code here to be mostly lock-free
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* and only use the mutex for list manipulations, not to protect the
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* various other global variables. Then we can avoid holding the mutex
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* around driver operations, and all is happy.
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*/
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static LIST_HEAD(rfkill_list); /* list of registered rf switches */
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static DEFINE_MUTEX(rfkill_global_mutex);
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static LIST_HEAD(rfkill_fds); /* list of open fds of /dev/rfkill */
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static unsigned int rfkill_default_state = 1;
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module_param_named(default_state, rfkill_default_state, uint, 0444);
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MODULE_PARM_DESC(default_state,
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"Default initial state for all radio types, 0 = radio off");
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static struct {
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bool cur, sav;
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} rfkill_global_states[NUM_RFKILL_TYPES];
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static bool rfkill_epo_lock_active;
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#ifdef CONFIG_RFKILL_LEDS
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static void rfkill_led_trigger_event(struct rfkill *rfkill)
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{
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struct led_trigger *trigger;
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if (!rfkill->registered)
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return;
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trigger = &rfkill->led_trigger;
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if (rfkill->state & RFKILL_BLOCK_ANY)
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led_trigger_event(trigger, LED_OFF);
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else
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led_trigger_event(trigger, LED_FULL);
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}
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static int rfkill_led_trigger_activate(struct led_classdev *led)
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{
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struct rfkill *rfkill;
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rfkill = container_of(led->trigger, struct rfkill, led_trigger);
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rfkill_led_trigger_event(rfkill);
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return 0;
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}
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const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
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{
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return rfkill->led_trigger.name;
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}
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EXPORT_SYMBOL(rfkill_get_led_trigger_name);
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void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
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{
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BUG_ON(!rfkill);
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rfkill->ledtrigname = name;
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}
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EXPORT_SYMBOL(rfkill_set_led_trigger_name);
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static int rfkill_led_trigger_register(struct rfkill *rfkill)
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{
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rfkill->led_trigger.name = rfkill->ledtrigname
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? : dev_name(&rfkill->dev);
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rfkill->led_trigger.activate = rfkill_led_trigger_activate;
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return led_trigger_register(&rfkill->led_trigger);
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}
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static void rfkill_led_trigger_unregister(struct rfkill *rfkill)
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{
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led_trigger_unregister(&rfkill->led_trigger);
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}
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static struct led_trigger rfkill_any_led_trigger;
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static struct led_trigger rfkill_none_led_trigger;
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static struct work_struct rfkill_global_led_trigger_work;
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static void rfkill_global_led_trigger_worker(struct work_struct *work)
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{
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enum led_brightness brightness = LED_OFF;
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struct rfkill *rfkill;
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mutex_lock(&rfkill_global_mutex);
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list_for_each_entry(rfkill, &rfkill_list, node) {
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if (!(rfkill->state & RFKILL_BLOCK_ANY)) {
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brightness = LED_FULL;
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break;
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}
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}
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mutex_unlock(&rfkill_global_mutex);
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led_trigger_event(&rfkill_any_led_trigger, brightness);
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led_trigger_event(&rfkill_none_led_trigger,
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brightness == LED_OFF ? LED_FULL : LED_OFF);
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}
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static void rfkill_global_led_trigger_event(void)
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{
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schedule_work(&rfkill_global_led_trigger_work);
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}
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static int rfkill_global_led_trigger_register(void)
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{
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int ret;
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INIT_WORK(&rfkill_global_led_trigger_work,
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rfkill_global_led_trigger_worker);
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rfkill_any_led_trigger.name = "rfkill-any";
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ret = led_trigger_register(&rfkill_any_led_trigger);
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if (ret)
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return ret;
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rfkill_none_led_trigger.name = "rfkill-none";
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ret = led_trigger_register(&rfkill_none_led_trigger);
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if (ret)
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led_trigger_unregister(&rfkill_any_led_trigger);
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else
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/* Delay activation until all global triggers are registered */
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rfkill_global_led_trigger_event();
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return ret;
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}
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static void rfkill_global_led_trigger_unregister(void)
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{
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led_trigger_unregister(&rfkill_none_led_trigger);
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led_trigger_unregister(&rfkill_any_led_trigger);
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cancel_work_sync(&rfkill_global_led_trigger_work);
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}
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#else
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static void rfkill_led_trigger_event(struct rfkill *rfkill)
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{
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}
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static inline int rfkill_led_trigger_register(struct rfkill *rfkill)
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{
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return 0;
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}
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static inline void rfkill_led_trigger_unregister(struct rfkill *rfkill)
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{
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}
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static void rfkill_global_led_trigger_event(void)
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{
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}
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static int rfkill_global_led_trigger_register(void)
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{
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return 0;
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}
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static void rfkill_global_led_trigger_unregister(void)
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{
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}
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#endif /* CONFIG_RFKILL_LEDS */
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static void rfkill_fill_event(struct rfkill_event *ev, struct rfkill *rfkill,
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enum rfkill_operation op)
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{
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unsigned long flags;
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ev->idx = rfkill->idx;
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ev->type = rfkill->type;
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ev->op = op;
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spin_lock_irqsave(&rfkill->lock, flags);
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ev->hard = !!(rfkill->state & RFKILL_BLOCK_HW);
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ev->soft = !!(rfkill->state & (RFKILL_BLOCK_SW |
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RFKILL_BLOCK_SW_PREV));
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ev->hard_block_reasons = rfkill->hard_block_reasons;
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spin_unlock_irqrestore(&rfkill->lock, flags);
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}
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static void rfkill_send_events(struct rfkill *rfkill, enum rfkill_operation op)
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{
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struct rfkill_data *data;
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struct rfkill_int_event *ev;
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list_for_each_entry(data, &rfkill_fds, list) {
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ev = kzalloc(sizeof(*ev), GFP_KERNEL);
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if (!ev)
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continue;
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rfkill_fill_event(&ev->ev, rfkill, op);
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mutex_lock(&data->mtx);
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list_add_tail(&ev->list, &data->events);
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mutex_unlock(&data->mtx);
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wake_up_interruptible(&data->read_wait);
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}
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}
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static void rfkill_event(struct rfkill *rfkill)
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{
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if (!rfkill->registered)
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return;
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kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);
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/* also send event to /dev/rfkill */
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rfkill_send_events(rfkill, RFKILL_OP_CHANGE);
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}
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/**
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* rfkill_set_block - wrapper for set_block method
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*
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* @rfkill: the rfkill struct to use
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* @blocked: the new software state
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*
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* Calls the set_block method (when applicable) and handles notifications
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* etc. as well.
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*/
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static void rfkill_set_block(struct rfkill *rfkill, bool blocked)
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{
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unsigned long flags;
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bool prev, curr;
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int err;
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if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP))
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return;
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/*
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* Some platforms (...!) generate input events which affect the
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* _hard_ kill state -- whenever something tries to change the
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* current software state query the hardware state too.
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*/
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if (rfkill->ops->query)
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rfkill->ops->query(rfkill, rfkill->data);
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spin_lock_irqsave(&rfkill->lock, flags);
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prev = rfkill->state & RFKILL_BLOCK_SW;
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if (prev)
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rfkill->state |= RFKILL_BLOCK_SW_PREV;
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else
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rfkill->state &= ~RFKILL_BLOCK_SW_PREV;
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if (blocked)
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rfkill->state |= RFKILL_BLOCK_SW;
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else
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rfkill->state &= ~RFKILL_BLOCK_SW;
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rfkill->state |= RFKILL_BLOCK_SW_SETCALL;
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spin_unlock_irqrestore(&rfkill->lock, flags);
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err = rfkill->ops->set_block(rfkill->data, blocked);
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spin_lock_irqsave(&rfkill->lock, flags);
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if (err) {
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/*
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* Failed -- reset status to _PREV, which may be different
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* from what we have set _PREV to earlier in this function
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* if rfkill_set_sw_state was invoked.
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*/
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if (rfkill->state & RFKILL_BLOCK_SW_PREV)
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rfkill->state |= RFKILL_BLOCK_SW;
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else
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rfkill->state &= ~RFKILL_BLOCK_SW;
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}
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rfkill->state &= ~RFKILL_BLOCK_SW_SETCALL;
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rfkill->state &= ~RFKILL_BLOCK_SW_PREV;
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curr = rfkill->state & RFKILL_BLOCK_SW;
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spin_unlock_irqrestore(&rfkill->lock, flags);
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rfkill_led_trigger_event(rfkill);
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rfkill_global_led_trigger_event();
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if (prev != curr)
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rfkill_event(rfkill);
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}
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static void rfkill_update_global_state(enum rfkill_type type, bool blocked)
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{
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int i;
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if (type != RFKILL_TYPE_ALL) {
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rfkill_global_states[type].cur = blocked;
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return;
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}
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for (i = 0; i < NUM_RFKILL_TYPES; i++)
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rfkill_global_states[i].cur = blocked;
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}
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#ifdef CONFIG_RFKILL_INPUT
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static atomic_t rfkill_input_disabled = ATOMIC_INIT(0);
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/**
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* __rfkill_switch_all - Toggle state of all switches of given type
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* @type: type of interfaces to be affected
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* @blocked: the new state
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*
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* This function sets the state of all switches of given type,
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* unless a specific switch is suspended.
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*
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* Caller must have acquired rfkill_global_mutex.
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*/
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static void __rfkill_switch_all(const enum rfkill_type type, bool blocked)
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{
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struct rfkill *rfkill;
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rfkill_update_global_state(type, blocked);
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list_for_each_entry(rfkill, &rfkill_list, node) {
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if (rfkill->type != type && type != RFKILL_TYPE_ALL)
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continue;
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rfkill_set_block(rfkill, blocked);
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}
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}
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/**
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* rfkill_switch_all - Toggle state of all switches of given type
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* @type: type of interfaces to be affected
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* @blocked: the new state
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*
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* Acquires rfkill_global_mutex and calls __rfkill_switch_all(@type, @state).
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* Please refer to __rfkill_switch_all() for details.
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*
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* Does nothing if the EPO lock is active.
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*/
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void rfkill_switch_all(enum rfkill_type type, bool blocked)
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{
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if (atomic_read(&rfkill_input_disabled))
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return;
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mutex_lock(&rfkill_global_mutex);
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if (!rfkill_epo_lock_active)
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__rfkill_switch_all(type, blocked);
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mutex_unlock(&rfkill_global_mutex);
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}
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/**
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* rfkill_epo - emergency power off all transmitters
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*
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* This kicks all non-suspended rfkill devices to RFKILL_STATE_SOFT_BLOCKED,
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* ignoring everything in its path but rfkill_global_mutex and rfkill->mutex.
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*
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* The global state before the EPO is saved and can be restored later
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* using rfkill_restore_states().
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*/
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void rfkill_epo(void)
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{
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struct rfkill *rfkill;
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int i;
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if (atomic_read(&rfkill_input_disabled))
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return;
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mutex_lock(&rfkill_global_mutex);
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rfkill_epo_lock_active = true;
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list_for_each_entry(rfkill, &rfkill_list, node)
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rfkill_set_block(rfkill, true);
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for (i = 0; i < NUM_RFKILL_TYPES; i++) {
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rfkill_global_states[i].sav = rfkill_global_states[i].cur;
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rfkill_global_states[i].cur = true;
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}
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mutex_unlock(&rfkill_global_mutex);
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}
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/**
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* rfkill_restore_states - restore global states
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*
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* Restore (and sync switches to) the global state from the
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* states in rfkill_default_states. This can undo the effects of
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* a call to rfkill_epo().
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*/
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void rfkill_restore_states(void)
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{
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int i;
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if (atomic_read(&rfkill_input_disabled))
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return;
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mutex_lock(&rfkill_global_mutex);
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rfkill_epo_lock_active = false;
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for (i = 0; i < NUM_RFKILL_TYPES; i++)
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__rfkill_switch_all(i, rfkill_global_states[i].sav);
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mutex_unlock(&rfkill_global_mutex);
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}
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/**
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* rfkill_remove_epo_lock - unlock state changes
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*
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* Used by rfkill-input manually unlock state changes, when
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* the EPO switch is deactivated.
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*/
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void rfkill_remove_epo_lock(void)
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{
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if (atomic_read(&rfkill_input_disabled))
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return;
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mutex_lock(&rfkill_global_mutex);
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rfkill_epo_lock_active = false;
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mutex_unlock(&rfkill_global_mutex);
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}
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/**
|
|
* 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, unsigned long reason)
|
|
{
|
|
unsigned long flags;
|
|
bool ret, prev;
|
|
|
|
BUG_ON(!rfkill);
|
|
|
|
if (WARN(reason &
|
|
~(RFKILL_HARD_BLOCK_SIGNAL | RFKILL_HARD_BLOCK_NOT_OWNER),
|
|
"hw_state reason not supported: 0x%lx", reason))
|
|
return blocked;
|
|
|
|
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 sprintf(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 sprintf(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 sprintf(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 sprintf(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 sprintf(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);
|
|
|
|
return sprintf(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_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 sprintf(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);
|
|
|
|
return sprintf(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_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(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);
|
|
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
rfkill = kzalloc(sizeof(*rfkill) + strlen(name) + 1, GFP_KERNEL);
|
|
if (!rfkill)
|
|
return NULL;
|
|
|
|
spin_lock_init(&rfkill->lock);
|
|
INIT_LIST_HEAD(&rfkill->node);
|
|
rfkill->type = type;
|
|
strcpy(rfkill->name, name);
|
|
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;
|
|
bool cur;
|
|
|
|
rfkill = container_of(work, struct rfkill, sync_work);
|
|
|
|
mutex_lock(&rfkill_global_mutex);
|
|
cur = rfkill_global_states[rfkill->type].cur;
|
|
rfkill_set_block(rfkill, cur);
|
|
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) {
|
|
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(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
INIT_LIST_HEAD(&data->events);
|
|
mutex_init(&data->mtx);
|
|
init_waitqueue_head(&data->read_wait);
|
|
|
|
mutex_lock(&rfkill_global_mutex);
|
|
mutex_lock(&data->mtx);
|
|
/*
|
|
* start getting events from elsewhere but hold mtx to get
|
|
* startup events added first
|
|
*/
|
|
|
|
list_for_each_entry(rfkill, &rfkill_list, node) {
|
|
ev = kzalloc(sizeof(*ev), GFP_KERNEL);
|
|
if (!ev)
|
|
goto free;
|
|
rfkill_fill_event(&ev->ev, rfkill, RFKILL_OP_ADD);
|
|
list_add_tail(&ev->list, &data->events);
|
|
}
|
|
list_add(&data->list, &rfkill_fds);
|
|
mutex_unlock(&data->mtx);
|
|
mutex_unlock(&rfkill_global_mutex);
|
|
|
|
file->private_data = data;
|
|
|
|
return stream_open(inode, file);
|
|
|
|
free:
|
|
mutex_unlock(&data->mtx);
|
|
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);
|
|
ret = sz;
|
|
if (copy_to_user(buf, &ev->ev, sz))
|
|
ret = -EFAULT;
|
|
|
|
list_del(&ev->list);
|
|
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 *rfkill;
|
|
struct rfkill_event 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));
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_RFKILL_INPUT
|
|
static long rfkill_fop_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct rfkill_data *data = file->private_data;
|
|
|
|
if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC)
|
|
return -ENOSYS;
|
|
|
|
if (_IOC_NR(cmd) != RFKILL_IOC_NOINPUT)
|
|
return -ENOSYS;
|
|
|
|
mutex_lock(&data->mtx);
|
|
|
|
if (!data->input_handler) {
|
|
if (atomic_inc_return(&rfkill_input_disabled) == 1)
|
|
printk(KERN_DEBUG "rfkill: input handler disabled\n");
|
|
data->input_handler = true;
|
|
}
|
|
|
|
mutex_unlock(&data->mtx);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
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,
|
|
#ifdef CONFIG_RFKILL_INPUT
|
|
.unlocked_ioctl = rfkill_fop_ioctl,
|
|
.compat_ioctl = compat_ptr_ioctl,
|
|
#endif
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
#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);
|