/*
 * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.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.
 */

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#include "leds.h"

DEFINE_LED_TRIGGER(bt_power_led_trigger);

struct hci_basic_led_trigger {
	struct led_trigger	led_trigger;
	struct hci_dev		*hdev;
};

#define to_hci_basic_led_trigger(arg) container_of(arg, \
			struct hci_basic_led_trigger, led_trigger)

void hci_leds_update_powered(struct hci_dev *hdev, bool enabled)
{
	if (hdev->power_led)
		led_trigger_event(hdev->power_led,
				  enabled ? LED_FULL : LED_OFF);

	if (!enabled) {
		struct hci_dev *d;

		read_lock(&hci_dev_list_lock);

		list_for_each_entry(d, &hci_dev_list, list) {
			if (test_bit(HCI_UP, &d->flags))
				enabled = true;
		}

		read_unlock(&hci_dev_list_lock);
	}

	led_trigger_event(bt_power_led_trigger, enabled ? LED_FULL : LED_OFF);
}

static void power_activate(struct led_classdev *led_cdev)
{
	struct hci_basic_led_trigger *htrig;
	bool powered;

	htrig = to_hci_basic_led_trigger(led_cdev->trigger);
	powered = test_bit(HCI_UP, &htrig->hdev->flags);

	led_trigger_event(led_cdev->trigger, powered ? LED_FULL : LED_OFF);
}

static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,
			void (*activate)(struct led_classdev *led_cdev),
			const char *name)
{
	struct hci_basic_led_trigger *htrig;

	htrig =	devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL);
	if (!htrig)
		return NULL;

	htrig->hdev = hdev;
	htrig->led_trigger.activate = activate;
	htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
						 "%s-%s", hdev->name,
						 name);
	if (!htrig->led_trigger.name)
		goto err_alloc;

	if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger))
		goto err_register;

	return &htrig->led_trigger;

err_register:
	devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name);
err_alloc:
	devm_kfree(&hdev->dev, htrig);
	return NULL;
}

void hci_leds_init(struct hci_dev *hdev)
{
	/* initialize power_led */
	hdev->power_led = led_allocate_basic(hdev, power_activate, "power");
}

void bt_leds_init(void)
{
	led_trigger_register_simple("bluetooth-power", &bt_power_led_trigger);
}

void bt_leds_cleanup(void)
{
	led_trigger_unregister_simple(bt_power_led_trigger);
}
/linux/net-next.git/log/tools/testing/selftests/drivers'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='7a7b5df84b6b4e5d599c7289526eed96541a0654'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/testing?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>testing</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>selftests</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/drivers?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>drivers</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='7a7b5df84b6b4e5d599c7289526eed96541a0654'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Johan Hovold &lt;johan@kernel.org&gt;</td><td class='right'>2017-01-30 11:26:38 +0100</td></tr>
<tr><th>committer</th><td>Jiri Kosina &lt;jkosina@suse.cz&gt;</td><td class='right'>2017-01-31 12:59:32 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/drivers?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>7a7b5df84b6b4e5d599c7289526eed96541a0654</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/testing/selftests/drivers?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>cf7514c7ddf4410fe37ca9099a2785e1cf08fa7d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/testing/selftests/drivers?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>tools/testing/selftests/drivers</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/drivers?h=nds-private-remove&amp;id=877a021e08ccb6434718c0cc781fdf943c884cc0'>877a021e08ccb6434718c0cc781fdf943c884cc0</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/testing/selftests/drivers?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654&amp;id2=877a021e08ccb6434718c0cc781fdf943c884cc0'>diff</a>)</td></tr></table>
<div class='commit-subject'>HID: cp2112: fix sleep-while-atomic</div><div class='commit-msg'>A recent commit fixing DMA-buffers on stack added a shared transfer
buffer protected by a spinlock. This is broken as the USB HID request
callbacks can sleep. Fix this up by replacing the spinlock with a mutex.

Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable")
Cc: stable &lt;stable@vger.kernel.org&gt;	# 4.9
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Reviewed-by: Benjamin Tissoires &lt;benjamin.tissoires@redhat.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>Diffstat</a> (limited to 'tools/testing/selftests/drivers')</div><table summary='diffstat' class='diffstat'>