drivers/uwb/uwbd.c - kernel/msm-4.19 - Gitiles

 /*
  * Ultra Wide Band
  * Neighborhood Management Daemon
  *
  * Copyright (C) 2005-2006 Intel Corporation
  * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version
  * 2 as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
  *
  *
  * This daemon takes care of maintaing information that describes the
  * UWB neighborhood that the radios in this machine can see. It also
  * keeps a tab of which devices are visible, makes sure each HC sits
  * on a different channel to avoid interfering, etc.
  *
  * Different drivers (radio controller, device, any API in general)
  * communicate with this daemon through an event queue. Daemon wakes
  * up, takes a list of events and handles them one by one; handling
  * function is extracted from a table based on the event's type and
  * subtype. Events are freed only if the handling function says so.
  *
  *   . Lock protecting the event list has to be an spinlock and locked
  *     with IRQSAVE because it might be called from an interrupt
  *     context (ie: when events arrive and the notification drops
  *     down from the ISR).
  *
  *   . UWB radio controller drivers queue events to the daemon using
  *     uwbd_event_queue(). They just get the event, chew it to make it
  *     look like UWBD likes it and pass it in a buffer allocated with
  *     uwb_event_alloc().
  *
  * EVENTS
  *
  * Events have a type, a subtype, a length, some other stuff and the
  * data blob, which depends on the event. The header is 'struct
  * uwb_event'; for payloads, see 'struct uwbd_evt_*'.
  *
  * EVENT HANDLER TABLES
  *
  * To find a handling function for an event, the type is used to index
  * a subtype-table in the type-table. The subtype-table is indexed
  * with the subtype to get the function that handles the event. Start
  * with the main type-table 'uwbd_evt_type_handler'.
  *
  * DEVICES
  *
  * Devices are created when a bunch of beacons have been received and
  * it is stablished that the device has stable radio presence. CREATED
  * only, not configured. Devices are ONLY configured when an
  * Application-Specific IE Probe is receieved, in which the device
  * declares which Protocol ID it groks. Then the device is CONFIGURED
  * (and the driver->probe() stuff of the device model is invoked).
  *
  * Devices are considered disconnected when a certain number of
  * beacons are not received in an amount of time.
  *
  * Handler functions are called normally uwbd_evt_handle_*().
  */
 #include <linux/kthread.h>
 #include <linux/module.h>
 #include <linux/freezer.h>

 #include "uwb-internal.h"

 /*
  * UWBD Event handler function signature
  *
  * Return !0 if the event needs not to be freed (ie the handler
  * takes/took care of it). 0 means the daemon code will free the
  * event.
  *
  * @evt->rc is already referenced and guaranteed to exist. See
  * uwb_evt_handle().
  */
 typedef int (*uwbd_evt_handler_f)(struct uwb_event *);

 /**
  * Properties of a UWBD event
  *
  * @handler:    the function that will handle this event
  * @name:       text name of event
  */
 struct uwbd_event {
 	uwbd_evt_handler_f handler;
 	const char *name;
 };

 /* Table of handlers for and properties of the UWBD Radio Control Events */
 static struct uwbd_event uwbd_urc_events[] = {
 	[UWB_RC_EVT_IE_RCV] = {
 		.handler = uwbd_evt_handle_rc_ie_rcv,
 		.name = "IE_RECEIVED"
 	},
 	[UWB_RC_EVT_BEACON] = {
 		.handler = uwbd_evt_handle_rc_beacon,
 		.name = "BEACON_RECEIVED"
 	},
 	[UWB_RC_EVT_BEACON_SIZE] = {
 		.handler = uwbd_evt_handle_rc_beacon_size,
 		.name = "BEACON_SIZE_CHANGE"
 	},
 	[UWB_RC_EVT_BPOIE_CHANGE] = {
 		.handler = uwbd_evt_handle_rc_bpoie_change,
 		.name = "BPOIE_CHANGE"
 	},
 	[UWB_RC_EVT_BP_SLOT_CHANGE] = {
 		.handler = uwbd_evt_handle_rc_bp_slot_change,
 		.name = "BP_SLOT_CHANGE"
 	},
 	[UWB_RC_EVT_DRP_AVAIL] = {
 		.handler = uwbd_evt_handle_rc_drp_avail,
 		.name = "DRP_AVAILABILITY_CHANGE"
 	},
 	[UWB_RC_EVT_DRP] = {
 		.handler = uwbd_evt_handle_rc_drp,
 		.name = "DRP"
 	},
 	[UWB_RC_EVT_DEV_ADDR_CONFLICT] = {
 		.handler = uwbd_evt_handle_rc_dev_addr_conflict,
 		.name = "DEV_ADDR_CONFLICT",
 	},
 };


 struct uwbd_evt_type_handler {
 	const char *name;
 	struct uwbd_event *uwbd_events;
 	size_t size;
 };

 /* Table of handlers for each UWBD Event type. */
 static struct uwbd_evt_type_handler uwbd_urc_evt_type_handlers[] = {
 	[UWB_RC_CET_GENERAL] = {
 		.name        = "URC",
 		.uwbd_events = uwbd_urc_events,
 		.size        = ARRAY_SIZE(uwbd_urc_events),
 	},
 };

 static const struct uwbd_event uwbd_message_handlers[] = {
 	[UWB_EVT_MSG_RESET] = {
 		.handler = uwbd_msg_handle_reset,
 		.name = "reset",
 	},
 };

 /*
  * Handle an URC event passed to the UWB Daemon
  *
  * @evt: the event to handle
  * @returns: 0 if the event can be kfreed, !0 on the contrary
  *           (somebody else took ownership) [coincidentally, returning
  *           a <0 errno code will free it :)].
  *
  * Looks up the two indirection tables (one for the type, one for the
  * subtype) to decide which function handles it and then calls the
  * handler.
  *
  * The event structure passed to the event handler has the radio
  * controller in @evt->rc referenced. The reference will be dropped
  * once the handler returns, so if it needs it for longer (async),
  * it'll need to take another one.
  */
 static
 int uwbd_event_handle_urc(struct uwb_event *evt)
 {
 	int result = -EINVAL;
 	struct uwbd_evt_type_handler *type_table;
 	uwbd_evt_handler_f handler;
 	u8 type, context;
 	u16 event;

 	type = evt->notif.rceb->bEventType;
 	event = le16_to_cpu(evt->notif.rceb->wEvent);
 	context = evt->notif.rceb->bEventContext;

 	if (type >= ARRAY_SIZE(uwbd_urc_evt_type_handlers))
 		goto out;
 	type_table = &uwbd_urc_evt_type_handlers[type];
 	if (type_table->uwbd_events == NULL)
 		goto out;
 	if (event >= type_table->size)
 		goto out;
 	handler = type_table->uwbd_events[event].handler;
 	if (handler == NULL)
 		goto out;

 	result = (*handler)(evt);
 out:
 	if (result < 0)
 		dev_err(&evt->rc->uwb_dev.dev,
 			"UWBD: event 0x%02x/%04x/%02x, handling failed: %d\n",
 			type, event, context, result);
 	return result;
 }

 static void uwbd_event_handle_message(struct uwb_event *evt)
 {
 	struct uwb_rc *rc;
 	int result;

 	rc = evt->rc;

 	if (evt->message < 0 || evt->message >= ARRAY_SIZE(uwbd_message_handlers)) {
 		dev_err(&rc->uwb_dev.dev, "UWBD: invalid message type %d\n", evt->message);
 		return;
 	}

 	result = uwbd_message_handlers[evt->message].handler(evt);
 	if (result < 0)
 		dev_err(&rc->uwb_dev.dev, "UWBD: '%s' message failed: %d\n",
 			uwbd_message_handlers[evt->message].name, result);
 }

 static void uwbd_event_handle(struct uwb_event *evt)
 {
 	struct uwb_rc *rc;
 	int should_keep;

 	rc = evt->rc;

 	if (rc->ready) {
 		switch (evt->type) {
 		case UWB_EVT_TYPE_NOTIF:
 			should_keep = uwbd_event_handle_urc(evt);
 			if (should_keep <= 0)
 				kfree(evt->notif.rceb);
 			break;
 		case UWB_EVT_TYPE_MSG:
 			uwbd_event_handle_message(evt);
 			break;
 		default:
 			dev_err(&rc->uwb_dev.dev, "UWBD: invalid event type %d\n", evt->type);
 			break;
 		}
 	}

 	__uwb_rc_put(rc);	/* for the __uwb_rc_get() in uwb_rc_notif_cb() */
 }

 /**
  * UWB Daemon
  *
  * Listens to all UWB notifications and takes care to track the state
  * of the UWB neighboorhood for the kernel. When we do a run, we
  * spinlock, move the list to a private copy and release the
  * lock. Hold it as little as possible. Not a conflict: it is
  * guaranteed we own the events in the private list.
  *
  * FIXME: should change so we don't have a 1HZ timer all the time, but
  *        only if there are devices.
  */
 static int uwbd(void *param)
 {
 	struct uwb_rc *rc = param;
 	unsigned long flags;
 	struct uwb_event *evt;
 	int should_stop = 0;

 	while (1) {
 		wait_event_interruptible_timeout(
 			rc->uwbd.wq,
 			!list_empty(&rc->uwbd.event_list)
 			  || (should_stop = kthread_should_stop()),
 			HZ);
 		if (should_stop)
 			break;
 		try_to_freeze();

 		spin_lock_irqsave(&rc->uwbd.event_list_lock, flags);
 		if (!list_empty(&rc->uwbd.event_list)) {
 			evt = list_first_entry(&rc->uwbd.event_list, struct uwb_event, list_node);
 			list_del(&evt->list_node);
 		} else
 			evt = NULL;
 		spin_unlock_irqrestore(&rc->uwbd.event_list_lock, flags);

 		if (evt) {
 			uwbd_event_handle(evt);
 			kfree(evt);
 		}

 		uwb_beca_purge(rc);	/* Purge devices that left */
 	}
 	return 0;
 }


 /** Start the UWB daemon */
 void uwbd_start(struct uwb_rc *rc)
 {
 	rc->uwbd.task = kthread_run(uwbd, rc, "uwbd");
 	if (rc->uwbd.task == NULL)
 		printk(KERN_ERR "UWB: Cannot start management daemon; "
 		       "UWB won't work\n");
 	else
 		rc->uwbd.pid = rc->uwbd.task->pid;
 }

 /* Stop the UWB daemon and free any unprocessed events */
 void uwbd_stop(struct uwb_rc *rc)
 {
 	kthread_stop(rc->uwbd.task);
 	uwbd_flush(rc);
 }

 /*
  * Queue an event for the management daemon
  *
  * When some lower layer receives an event, it uses this function to
  * push it forward to the UWB daemon.
  *
  * Once you pass the event, you don't own it any more, but the daemon
  * does. It will uwb_event_free() it when done, so make sure you
  * uwb_event_alloc()ed it or bad things will happen.
  *
  * If the daemon is not running, we just free the event.
  */
 void uwbd_event_queue(struct uwb_event *evt)
 {
 	struct uwb_rc *rc = evt->rc;
 	unsigned long flags;

 	spin_lock_irqsave(&rc->uwbd.event_list_lock, flags);
 	if (rc->uwbd.pid != 0) {
 		list_add(&evt->list_node, &rc->uwbd.event_list);
 		wake_up_all(&rc->uwbd.wq);
 	} else {
 		__uwb_rc_put(evt->rc);
 		if (evt->type == UWB_EVT_TYPE_NOTIF)
 			kfree(evt->notif.rceb);
 		kfree(evt);
 	}
 	spin_unlock_irqrestore(&rc->uwbd.event_list_lock, flags);
 	return;
 }

 void uwbd_flush(struct uwb_rc *rc)
 {
 	struct uwb_event *evt, *nxt;

 	spin_lock_irq(&rc->uwbd.event_list_lock);
 	list_for_each_entry_safe(evt, nxt, &rc->uwbd.event_list, list_node) {
 		if (evt->rc == rc) {
 			__uwb_rc_put(rc);
 			list_del(&evt->list_node);
 			if (evt->type == UWB_EVT_TYPE_NOTIF)
 				kfree(evt->notif.rceb);
 			kfree(evt);
 		}
 	}
 	spin_unlock_irq(&rc->uwbd.event_list_lock);
 }
	/*
	* Ultra Wide Band
	* Neighborhood Management Daemon
	*
	* Copyright (C) 2005-2006 Intel Corporation
	* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License version
	* 2 as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	* 02110-1301, USA.
	*
	*
	* This daemon takes care of maintaing information that describes the
	* UWB neighborhood that the radios in this machine can see. It also
	* keeps a tab of which devices are visible, makes sure each HC sits
	* on a different channel to avoid interfering, etc.
	*
	* Different drivers (radio controller, device, any API in general)
	* communicate with this daemon through an event queue. Daemon wakes
	* up, takes a list of events and handles them one by one; handling
	* function is extracted from a table based on the event's type and
	* subtype. Events are freed only if the handling function says so.
	*
	* . Lock protecting the event list has to be an spinlock and locked
	* with IRQSAVE because it might be called from an interrupt
	* context (ie: when events arrive and the notification drops
	* down from the ISR).
	*
	* . UWB radio controller drivers queue events to the daemon using
	* uwbd_event_queue(). They just get the event, chew it to make it
	* look like UWBD likes it and pass it in a buffer allocated with
	* uwb_event_alloc().
	*
	* EVENTS
	*
	* Events have a type, a subtype, a length, some other stuff and the
	* data blob, which depends on the event. The header is 'struct
	* uwb_event'; for payloads, see 'struct uwbd_evt_*'.
	*
	* EVENT HANDLER TABLES
	*
	* To find a handling function for an event, the type is used to index
	* a subtype-table in the type-table. The subtype-table is indexed
	* with the subtype to get the function that handles the event. Start
	* with the main type-table 'uwbd_evt_type_handler'.
	*
	* DEVICES
	*
	* Devices are created when a bunch of beacons have been received and
	* it is stablished that the device has stable radio presence. CREATED
	* only, not configured. Devices are ONLY configured when an
	* Application-Specific IE Probe is receieved, in which the device
	* declares which Protocol ID it groks. Then the device is CONFIGURED
	* (and the driver->probe() stuff of the device model is invoked).
	*
	* Devices are considered disconnected when a certain number of
	* beacons are not received in an amount of time.
	*
	* Handler functions are called normally uwbd_evt_handle_*().
	*/
	#include <linux/kthread.h>
	#include <linux/module.h>
	#include <linux/freezer.h>

	#include "uwb-internal.h"

	/*
	* UWBD Event handler function signature
	*
	* Return !0 if the event needs not to be freed (ie the handler
	* takes/took care of it). 0 means the daemon code will free the
	* event.
	*
	* @evt->rc is already referenced and guaranteed to exist. See
	* uwb_evt_handle().
	*/
	typedef int (uwbd_evt_handler_f)(struct uwb_event );

	/**
	* Properties of a UWBD event
	*
	* @handler: the function that will handle this event
	* @name: text name of event
	*/
	struct uwbd_event {
	uwbd_evt_handler_f handler;
	const char *name;
	};

	/* Table of handlers for and properties of the UWBD Radio Control Events */
	static struct uwbd_event uwbd_urc_events[] = {
	[UWB_RC_EVT_IE_RCV] = {
	.handler = uwbd_evt_handle_rc_ie_rcv,
	.name = "IE_RECEIVED"
	},
	[UWB_RC_EVT_BEACON] = {
	.handler = uwbd_evt_handle_rc_beacon,
	.name = "BEACON_RECEIVED"
	},
	[UWB_RC_EVT_BEACON_SIZE] = {
	.handler = uwbd_evt_handle_rc_beacon_size,
	.name = "BEACON_SIZE_CHANGE"
	},
	[UWB_RC_EVT_BPOIE_CHANGE] = {
	.handler = uwbd_evt_handle_rc_bpoie_change,
	.name = "BPOIE_CHANGE"
	},
	[UWB_RC_EVT_BP_SLOT_CHANGE] = {
	.handler = uwbd_evt_handle_rc_bp_slot_change,
	.name = "BP_SLOT_CHANGE"
	},
	[UWB_RC_EVT_DRP_AVAIL] = {
	.handler = uwbd_evt_handle_rc_drp_avail,
	.name = "DRP_AVAILABILITY_CHANGE"
	},
	[UWB_RC_EVT_DRP] = {
	.handler = uwbd_evt_handle_rc_drp,
	.name = "DRP"
	},
	[UWB_RC_EVT_DEV_ADDR_CONFLICT] = {
	.handler = uwbd_evt_handle_rc_dev_addr_conflict,
	.name = "DEV_ADDR_CONFLICT",
	},
	};



	struct uwbd_evt_type_handler {
	const char *name;
	struct uwbd_event *uwbd_events;
	size_t size;
	};

	/* Table of handlers for each UWBD Event type. */
	static struct uwbd_evt_type_handler uwbd_urc_evt_type_handlers[] = {
	[UWB_RC_CET_GENERAL] = {
	.name = "URC",
	.uwbd_events = uwbd_urc_events,
	.size = ARRAY_SIZE(uwbd_urc_events),
	},
	};

	static const struct uwbd_event uwbd_message_handlers[] = {
	[UWB_EVT_MSG_RESET] = {
	.handler = uwbd_msg_handle_reset,
	.name = "reset",
	},
	};

	/*
	* Handle an URC event passed to the UWB Daemon
	*
	* @evt: the event to handle
	* @returns: 0 if the event can be kfreed, !0 on the contrary
	* (somebody else took ownership) [coincidentally, returning
	* a <0 errno code will free it :)].
	*
	* Looks up the two indirection tables (one for the type, one for the
	* subtype) to decide which function handles it and then calls the
	* handler.
	*
	* The event structure passed to the event handler has the radio
	* controller in @evt->rc referenced. The reference will be dropped
	* once the handler returns, so if it needs it for longer (async),
	* it'll need to take another one.
	*/
	static
	int uwbd_event_handle_urc(struct uwb_event *evt)
	{
	int result = -EINVAL;
	struct uwbd_evt_type_handler *type_table;
	uwbd_evt_handler_f handler;
	u8 type, context;
	u16 event;

	type = evt->notif.rceb->bEventType;
	event = le16_to_cpu(evt->notif.rceb->wEvent);
	context = evt->notif.rceb->bEventContext;

	if (type >= ARRAY_SIZE(uwbd_urc_evt_type_handlers))
	goto out;
	type_table = &uwbd_urc_evt_type_handlers[type];
	if (type_table->uwbd_events == NULL)
	goto out;
	if (event >= type_table->size)
	goto out;
	handler = type_table->uwbd_events[event].handler;
	if (handler == NULL)
	goto out;

	result = (*handler)(evt);
	out:
	if (result < 0)
	dev_err(&evt->rc->uwb_dev.dev,
	"UWBD: event 0x%02x/%04x/%02x, handling failed: %d\n",
	type, event, context, result);
	return result;
	}

	static void uwbd_event_handle_message(struct uwb_event *evt)
	{
	struct uwb_rc *rc;
	int result;

	rc = evt->rc;

	if (evt->message < 0 \|\| evt->message >= ARRAY_SIZE(uwbd_message_handlers)) {
	dev_err(&rc->uwb_dev.dev, "UWBD: invalid message type %d\n", evt->message);
	return;
	}

	result = uwbd_message_handlers[evt->message].handler(evt);
	if (result < 0)
	dev_err(&rc->uwb_dev.dev, "UWBD: '%s' message failed: %d\n",
	uwbd_message_handlers[evt->message].name, result);
	}

	static void uwbd_event_handle(struct uwb_event *evt)
	{
	struct uwb_rc *rc;
	int should_keep;

	rc = evt->rc;

	if (rc->ready) {
	switch (evt->type) {
	case UWB_EVT_TYPE_NOTIF:
	should_keep = uwbd_event_handle_urc(evt);
	if (should_keep <= 0)
	kfree(evt->notif.rceb);
	break;
	case UWB_EVT_TYPE_MSG:
	uwbd_event_handle_message(evt);
	break;
	default:
	dev_err(&rc->uwb_dev.dev, "UWBD: invalid event type %d\n", evt->type);
	break;
	}
	}

	__uwb_rc_put(rc); /* for the __uwb_rc_get() in uwb_rc_notif_cb() */
	}

	/**
	* UWB Daemon
	*
	* Listens to all UWB notifications and takes care to track the state
	* of the UWB neighboorhood for the kernel. When we do a run, we
	* spinlock, move the list to a private copy and release the
	* lock. Hold it as little as possible. Not a conflict: it is
	* guaranteed we own the events in the private list.
	*
	* FIXME: should change so we don't have a 1HZ timer all the time, but
	* only if there are devices.
	*/
	static int uwbd(void *param)
	{
	struct uwb_rc *rc = param;
	unsigned long flags;
	struct uwb_event *evt;
	int should_stop = 0;

	while (1) {
	wait_event_interruptible_timeout(
	rc->uwbd.wq,
	!list_empty(&rc->uwbd.event_list)
	\|\| (should_stop = kthread_should_stop()),
	HZ);
	if (should_stop)
	break;
	try_to_freeze();

	spin_lock_irqsave(&rc->uwbd.event_list_lock, flags);
	if (!list_empty(&rc->uwbd.event_list)) {
	evt = list_first_entry(&rc->uwbd.event_list, struct uwb_event, list_node);
	list_del(&evt->list_node);
	} else
	evt = NULL;
	spin_unlock_irqrestore(&rc->uwbd.event_list_lock, flags);

	if (evt) {
	uwbd_event_handle(evt);
	kfree(evt);
	}

	uwb_beca_purge(rc); /* Purge devices that left */
	}
	return 0;
	}


	/** Start the UWB daemon */
	void uwbd_start(struct uwb_rc *rc)
	{
	rc->uwbd.task = kthread_run(uwbd, rc, "uwbd");
	if (rc->uwbd.task == NULL)
	printk(KERN_ERR "UWB: Cannot start management daemon; "
	"UWB won't work\n");
	else
	rc->uwbd.pid = rc->uwbd.task->pid;
	}

	/* Stop the UWB daemon and free any unprocessed events */
	void uwbd_stop(struct uwb_rc *rc)
	{
	kthread_stop(rc->uwbd.task);
	uwbd_flush(rc);
	}

	/*
	* Queue an event for the management daemon
	*
	* When some lower layer receives an event, it uses this function to
	* push it forward to the UWB daemon.
	*
	* Once you pass the event, you don't own it any more, but the daemon
	* does. It will uwb_event_free() it when done, so make sure you
	* uwb_event_alloc()ed it or bad things will happen.
	*
	* If the daemon is not running, we just free the event.
	*/
	void uwbd_event_queue(struct uwb_event *evt)
	{
	struct uwb_rc *rc = evt->rc;
	unsigned long flags;

	spin_lock_irqsave(&rc->uwbd.event_list_lock, flags);
	if (rc->uwbd.pid != 0) {
	list_add(&evt->list_node, &rc->uwbd.event_list);
	wake_up_all(&rc->uwbd.wq);
	} else {
	__uwb_rc_put(evt->rc);
	if (evt->type == UWB_EVT_TYPE_NOTIF)
	kfree(evt->notif.rceb);
	kfree(evt);
	}
	spin_unlock_irqrestore(&rc->uwbd.event_list_lock, flags);
	return;
	}

	void uwbd_flush(struct uwb_rc *rc)
	{
	struct uwb_event evt, nxt;

	spin_lock_irq(&rc->uwbd.event_list_lock);
	list_for_each_entry_safe(evt, nxt, &rc->uwbd.event_list, list_node) {
	if (evt->rc == rc) {
	__uwb_rc_put(rc);
	list_del(&evt->list_node);
	if (evt->type == UWB_EVT_TYPE_NOTIF)
	kfree(evt->notif.rceb);
	kfree(evt);
	}
	}
	spin_unlock_irq(&rc->uwbd.event_list_lock);
	}