kernel: Replace ledtrig-netdev with upstream backport

The ledtrig-netdev was added to upstream Linux kernel 4.16, replace our
own version with the patch based on the upstream version.
This will remove the ledtrig-netdev support from kernel 3.18, because I
not want to spend time on backporting it to 3.18. This will make it
easier to use the upstream version with kernel 4.19, by just not
applying this patch.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

7 files changed, 1178 insertions, 615 deletions

diff --git a/target/linux/adm5120/patches-3.18/009-adm5120_leds_switch_trigger.patch b/target/linux/adm5120/patches-3.18/009-adm5120_leds_switch_trigger.patch
index f6dbdfc87d..4e37616f81 100644
--- a/target/linux/adm5120/patches-3.18/009-adm5120_leds_switch_trigger.patch
+++ b/target/linux/adm5120/patches-3.18/009-adm5120_leds_switch_trigger.patch
@@ -15,8 +15,8 @@
  endif # NEW_LEDS
 --- a/drivers/leds/Makefile
 +++ b/drivers/leds/Makefile
-@@ -63,3 +63,4 @@ obj-$(CONFIG_LEDS_DAC124S085)		+= leds-d
+@@ -62,3 +62,4 @@ obj-$(CONFIG_LEDS_DAC124S085)		+= leds-d
+ 
  # LED Triggers
  obj-$(CONFIG_LEDS_TRIGGERS)		+= trigger/
- obj-$(CONFIG_LEDS_TRIGGER_NETDEV)	+= ledtrig-netdev.o
 +obj-$(CONFIG_LEDS_TRIGGER_ADM5120_SWITCH) += ledtrig-adm5120-switch.o
diff --git a/target/linux/generic/backport-4.14/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch b/target/linux/generic/backport-4.14/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch
new file mode 100644
index 0000000000..b7d680a11b
--- /dev/null
+++ b/target/linux/generic/backport-4.14/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch
@@ -0,0 +1,588 @@
+From 06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 Mon Sep 17 00:00:00 2001
+From: Ben Whitten <ben.whitten@gmail.com>
+Date: Sun, 10 Dec 2017 21:17:55 +0000
+Subject: [PATCH] leds: trigger: Introduce a NETDEV trigger
+
+This commit introduces a NETDEV trigger for named device
+activity. Available triggers are link, rx, and tx.
+
+Signed-off-by: Ben Whitten <ben.whitten@gmail.com>
+Acked-by: Pavel Machek <pavel@ucw.cz>
+Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
+---
+ .../ABI/testing/sysfs-class-led-trigger-netdev     |  45 ++
+ drivers/leds/trigger/Kconfig                       |   7 +
+ drivers/leds/trigger/Makefile                      |   1 +
+ drivers/leds/trigger/ledtrig-netdev.c              | 496 +++++++++++++++++++++
+ 4 files changed, 549 insertions(+)
+ create mode 100644 Documentation/ABI/testing/sysfs-class-led-trigger-netdev
+ create mode 100644 drivers/leds/trigger/ledtrig-netdev.c
+
+--- /dev/null
++++ b/Documentation/ABI/testing/sysfs-class-led-trigger-netdev
+@@ -0,0 +1,45 @@
++What:		/sys/class/leds/<led>/device_name
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Specifies the network device name to monitor.
++
++What:		/sys/class/leds/<led>/interval
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Specifies the duration of the LED blink in milliseconds.
++		Defaults to 50 ms.
++
++What:		/sys/class/leds/<led>/link
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Signal the link state of the named network device.
++		If set to 0 (default), the LED's normal state is off.
++		If set to 1, the LED's normal state reflects the link state
++		of the named network device.
++		Setting this value also immediately changes the LED state.
++
++What:		/sys/class/leds/<led>/tx
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Signal transmission of data on the named network device.
++		If set to 0 (default), the LED will not blink on transmission.
++		If set to 1, the LED will blink for the milliseconds specified
++		in interval to signal transmission.
++
++What:		/sys/class/leds/<led>/rx
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Signal reception of data on the named network device.
++		If set to 0 (default), the LED will not blink on reception.
++		If set to 1, the LED will blink for the milliseconds specified
++		in interval to signal reception.
+--- a/drivers/leds/trigger/Kconfig
++++ b/drivers/leds/trigger/Kconfig
+@@ -126,4 +126,11 @@ config LEDS_TRIGGER_PANIC
+ 	  a different trigger.
+ 	  If unsure, say Y.
+ 
++config LEDS_TRIGGER_NETDEV
++	tristate "LED Netdev Trigger"
++	depends on NET && LEDS_TRIGGERS
++	help
++	  This allows LEDs to be controlled by network device activity.
++	  If unsure, say Y.
++
+ endif # LEDS_TRIGGERS
+--- a/drivers/leds/trigger/Makefile
++++ b/drivers/leds/trigger/Makefile
+@@ -11,3 +11,4 @@ obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON)	+=
+ obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT)	+= ledtrig-transient.o
+ obj-$(CONFIG_LEDS_TRIGGER_CAMERA)	+= ledtrig-camera.o
+ obj-$(CONFIG_LEDS_TRIGGER_PANIC)	+= ledtrig-panic.o
++obj-$(CONFIG_LEDS_TRIGGER_NETDEV)	+= ledtrig-netdev.o
+--- /dev/null
++++ b/drivers/leds/trigger/ledtrig-netdev.c
+@@ -0,0 +1,496 @@
++// SPDX-License-Identifier: GPL-2.0
++// Copyright 2017 Ben Whitten <ben.whitten@gmail.com>
++// Copyright 2007 Oliver Jowett <oliver@opencloud.com>
++//
++// LED Kernel Netdev Trigger
++//
++// Toggles the LED to reflect the link and traffic state of a named net device
++//
++// Derived from ledtrig-timer.c which is:
++//  Copyright 2005-2006 Openedhand Ltd.
++//  Author: Richard Purdie <rpurdie@openedhand.com>
++
++#include <linux/atomic.h>
++#include <linux/ctype.h>
++#include <linux/device.h>
++#include <linux/init.h>
++#include <linux/jiffies.h>
++#include <linux/kernel.h>
++#include <linux/leds.h>
++#include <linux/list.h>
++#include <linux/module.h>
++#include <linux/netdevice.h>
++#include <linux/spinlock.h>
++#include <linux/timer.h>
++#include "../leds.h"
++
++/*
++ * Configurable sysfs attributes:
++ *
++ * device_name - network device name to monitor
++ * interval - duration of LED blink, in milliseconds
++ * link -  LED's normal state reflects whether the link is up
++ *         (has carrier) or not
++ * tx -  LED blinks on transmitted data
++ * rx -  LED blinks on receive data
++ *
++ */
++
++struct led_netdev_data {
++	spinlock_t lock;
++
++	struct delayed_work work;
++	struct notifier_block notifier;
++
++	struct led_classdev *led_cdev;
++	struct net_device *net_dev;
++
++	char device_name[IFNAMSIZ];
++	atomic_t interval;
++	unsigned int last_activity;
++
++	unsigned long mode;
++#define NETDEV_LED_LINK	0
++#define NETDEV_LED_TX	1
++#define NETDEV_LED_RX	2
++#define NETDEV_LED_MODE_LINKUP	3
++};
++
++enum netdev_led_attr {
++	NETDEV_ATTR_LINK,
++	NETDEV_ATTR_TX,
++	NETDEV_ATTR_RX
++};
++
++static void set_baseline_state(struct led_netdev_data *trigger_data)
++{
++	int current_brightness;
++	struct led_classdev *led_cdev = trigger_data->led_cdev;
++
++	current_brightness = led_cdev->brightness;
++	if (current_brightness)
++		led_cdev->blink_brightness = current_brightness;
++	if (!led_cdev->blink_brightness)
++		led_cdev->blink_brightness = led_cdev->max_brightness;
++
++	if (!test_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode))
++		led_set_brightness(led_cdev, LED_OFF);
++	else {
++		if (test_bit(NETDEV_LED_LINK, &trigger_data->mode))
++			led_set_brightness(led_cdev,
++					   led_cdev->blink_brightness);
++		else
++			led_set_brightness(led_cdev, LED_OFF);
++
++		/* If we are looking for RX/TX start periodically
++		 * checking stats
++		 */
++		if (test_bit(NETDEV_LED_TX, &trigger_data->mode) ||
++		    test_bit(NETDEV_LED_RX, &trigger_data->mode))
++			schedule_delayed_work(&trigger_data->work, 0);
++	}
++}
++
++static ssize_t device_name_show(struct device *dev,
++				struct device_attribute *attr, char *buf)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	ssize_t len;
++
++	spin_lock_bh(&trigger_data->lock);
++	len = sprintf(buf, "%s\n", trigger_data->device_name);
++	spin_unlock_bh(&trigger_data->lock);
++
++	return len;
++}
++
++static ssize_t device_name_store(struct device *dev,
++				 struct device_attribute *attr, const char *buf,
++				 size_t size)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	if (size >= IFNAMSIZ)
++		return -EINVAL;
++
++	cancel_delayed_work_sync(&trigger_data->work);
++
++	spin_lock_bh(&trigger_data->lock);
++
++	if (trigger_data->net_dev) {
++		dev_put(trigger_data->net_dev);
++		trigger_data->net_dev = NULL;
++	}
++
++	strncpy(trigger_data->device_name, buf, size);
++	if (size > 0 && trigger_data->device_name[size - 1] == '\n')
++		trigger_data->device_name[size - 1] = 0;
++
++	if (trigger_data->device_name[0] != 0)
++		trigger_data->net_dev =
++		    dev_get_by_name(&init_net, trigger_data->device_name);
++
++	clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
++	if (trigger_data->net_dev != NULL)
++		if (netif_carrier_ok(trigger_data->net_dev))
++			set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
++
++	trigger_data->last_activity = 0;
++
++	set_baseline_state(trigger_data);
++	spin_unlock_bh(&trigger_data->lock);
++
++	return size;
++}
++
++static DEVICE_ATTR_RW(device_name);
++
++static ssize_t netdev_led_attr_show(struct device *dev, char *buf,
++	enum netdev_led_attr attr)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	int bit;
++
++	switch (attr) {
++	case NETDEV_ATTR_LINK:
++		bit = NETDEV_LED_LINK;
++		break;
++	case NETDEV_ATTR_TX:
++		bit = NETDEV_LED_TX;
++		break;
++	case NETDEV_ATTR_RX:
++		bit = NETDEV_LED_RX;
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	return sprintf(buf, "%u\n", test_bit(bit, &trigger_data->mode));
++}
++
++static ssize_t netdev_led_attr_store(struct device *dev, const char *buf,
++	size_t size, enum netdev_led_attr attr)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	unsigned long state;
++	int ret;
++	int bit;
++
++	ret = kstrtoul(buf, 0, &state);
++	if (ret)
++		return ret;
++
++	switch (attr) {
++	case NETDEV_ATTR_LINK:
++		bit = NETDEV_LED_LINK;
++		break;
++	case NETDEV_ATTR_TX:
++		bit = NETDEV_LED_TX;
++		break;
++	case NETDEV_ATTR_RX:
++		bit = NETDEV_LED_RX;
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	cancel_delayed_work_sync(&trigger_data->work);
++
++	if (state)
++		set_bit(bit, &trigger_data->mode);
++	else
++		clear_bit(bit, &trigger_data->mode);
++
++	set_baseline_state(trigger_data);
++
++	return size;
++}
++
++static ssize_t link_show(struct device *dev,
++	struct device_attribute *attr, char *buf)
++{
++	return netdev_led_attr_show(dev, buf, NETDEV_ATTR_LINK);
++}
++
++static ssize_t link_store(struct device *dev,
++	struct device_attribute *attr, const char *buf, size_t size)
++{
++	return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_LINK);
++}
++
++static DEVICE_ATTR_RW(link);
++
++static ssize_t tx_show(struct device *dev,
++	struct device_attribute *attr, char *buf)
++{
++	return netdev_led_attr_show(dev, buf, NETDEV_ATTR_TX);
++}
++
++static ssize_t tx_store(struct device *dev,
++	struct device_attribute *attr, const char *buf, size_t size)
++{
++	return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_TX);
++}
++
++static DEVICE_ATTR_RW(tx);
++
++static ssize_t rx_show(struct device *dev,
++	struct device_attribute *attr, char *buf)
++{
++	return netdev_led_attr_show(dev, buf, NETDEV_ATTR_RX);
++}
++
++static ssize_t rx_store(struct device *dev,
++	struct device_attribute *attr, const char *buf, size_t size)
++{
++	return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_RX);
++}
++
++static DEVICE_ATTR_RW(rx);
++
++static ssize_t interval_show(struct device *dev,
++			     struct device_attribute *attr, char *buf)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	return sprintf(buf, "%u\n",
++		       jiffies_to_msecs(atomic_read(&trigger_data->interval)));
++}
++
++static ssize_t interval_store(struct device *dev,
++			      struct device_attribute *attr, const char *buf,
++			      size_t size)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	unsigned long value;
++	int ret;
++
++	ret = kstrtoul(buf, 0, &value);
++	if (ret)
++		return ret;
++
++	/* impose some basic bounds on the timer interval */
++	if (value >= 5 && value <= 10000) {
++		cancel_delayed_work_sync(&trigger_data->work);
++
++		atomic_set(&trigger_data->interval, msecs_to_jiffies(value));
++		set_baseline_state(trigger_data);	/* resets timer */
++	}
++
++	return size;
++}
++
++static DEVICE_ATTR_RW(interval);
++
++static int netdev_trig_notify(struct notifier_block *nb,
++			      unsigned long evt, void *dv)
++{
++	struct net_device *dev =
++		netdev_notifier_info_to_dev((struct netdev_notifier_info *)dv);
++	struct led_netdev_data *trigger_data = container_of(nb,
++							    struct
++							    led_netdev_data,
++							    notifier);
++
++	if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE
++	    && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER
++	    && evt != NETDEV_CHANGENAME)
++		return NOTIFY_DONE;
++
++	if (strcmp(dev->name, trigger_data->device_name))
++		return NOTIFY_DONE;
++
++	cancel_delayed_work_sync(&trigger_data->work);
++
++	spin_lock_bh(&trigger_data->lock);
++
++	clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
++	switch (evt) {
++	case NETDEV_REGISTER:
++		if (trigger_data->net_dev)
++			dev_put(trigger_data->net_dev);
++		dev_hold(dev);
++		trigger_data->net_dev = dev;
++		break;
++	case NETDEV_CHANGENAME:
++	case NETDEV_UNREGISTER:
++		if (trigger_data->net_dev) {
++			dev_put(trigger_data->net_dev);
++			trigger_data->net_dev = NULL;
++		}
++		break;
++	case NETDEV_UP:
++	case NETDEV_CHANGE:
++		if (netif_carrier_ok(dev))
++			set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
++		break;
++	}
++
++	set_baseline_state(trigger_data);
++
++	spin_unlock_bh(&trigger_data->lock);
++
++	return NOTIFY_DONE;
++}
++
++/* here's the real work! */
++static void netdev_trig_work(struct work_struct *work)
++{
++	struct led_netdev_data *trigger_data = container_of(work,
++							    struct
++							    led_netdev_data,
++							    work.work);
++	struct rtnl_link_stats64 *dev_stats;
++	unsigned int new_activity;
++	struct rtnl_link_stats64 temp;
++	unsigned long interval;
++	int invert;
++
++	/* If we dont have a device, insure we are off */
++	if (!trigger_data->net_dev) {
++		led_set_brightness(trigger_data->led_cdev, LED_OFF);
++		return;
++	}
++
++	/* If we are not looking for RX/TX then return  */
++	if (!test_bit(NETDEV_LED_TX, &trigger_data->mode) &&
++	    !test_bit(NETDEV_LED_RX, &trigger_data->mode))
++		return;
++
++	dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
++	new_activity =
++	    (test_bit(NETDEV_LED_TX, &trigger_data->mode) ?
++		dev_stats->tx_packets : 0) +
++	    (test_bit(NETDEV_LED_RX, &trigger_data->mode) ?
++		dev_stats->rx_packets : 0);
++
++	if (trigger_data->last_activity != new_activity) {
++		led_stop_software_blink(trigger_data->led_cdev);
++
++		invert = test_bit(NETDEV_LED_LINK, &trigger_data->mode);
++		interval = jiffies_to_msecs(
++				atomic_read(&trigger_data->interval));
++		/* base state is ON (link present) */
++		led_blink_set_oneshot(trigger_data->led_cdev,
++				      &interval,
++				      &interval,
++				      invert);
++		trigger_data->last_activity = new_activity;
++	}
++
++	schedule_delayed_work(&trigger_data->work,
++			(atomic_read(&trigger_data->interval)*2));
++}
++
++static void netdev_trig_activate(struct led_classdev *led_cdev)
++{
++	struct led_netdev_data *trigger_data;
++	int rc;
++
++	trigger_data = kzalloc(sizeof(struct led_netdev_data), GFP_KERNEL);
++	if (!trigger_data)
++		return;
++
++	spin_lock_init(&trigger_data->lock);
++
++	trigger_data->notifier.notifier_call = netdev_trig_notify;
++	trigger_data->notifier.priority = 10;
++
++	INIT_DELAYED_WORK(&trigger_data->work, netdev_trig_work);
++
++	trigger_data->led_cdev = led_cdev;
++	trigger_data->net_dev = NULL;
++	trigger_data->device_name[0] = 0;
++
++	trigger_data->mode = 0;
++	atomic_set(&trigger_data->interval, msecs_to_jiffies(50));
++	trigger_data->last_activity = 0;
++
++	led_cdev->trigger_data = trigger_data;
++
++	rc = device_create_file(led_cdev->dev, &dev_attr_device_name);
++	if (rc)
++		goto err_out;
++	rc = device_create_file(led_cdev->dev, &dev_attr_link);
++	if (rc)
++		goto err_out_device_name;
++	rc = device_create_file(led_cdev->dev, &dev_attr_rx);
++	if (rc)
++		goto err_out_link;
++	rc = device_create_file(led_cdev->dev, &dev_attr_tx);
++	if (rc)
++		goto err_out_rx;
++	rc = device_create_file(led_cdev->dev, &dev_attr_interval);
++	if (rc)
++		goto err_out_tx;
++	rc = register_netdevice_notifier(&trigger_data->notifier);
++	if (rc)
++		goto err_out_interval;
++	return;
++
++err_out_interval:
++	device_remove_file(led_cdev->dev, &dev_attr_interval);
++err_out_tx:
++	device_remove_file(led_cdev->dev, &dev_attr_tx);
++err_out_rx:
++	device_remove_file(led_cdev->dev, &dev_attr_rx);
++err_out_link:
++	device_remove_file(led_cdev->dev, &dev_attr_link);
++err_out_device_name:
++	device_remove_file(led_cdev->dev, &dev_attr_device_name);
++err_out:
++	led_cdev->trigger_data = NULL;
++	kfree(trigger_data);
++}
++
++static void netdev_trig_deactivate(struct led_classdev *led_cdev)
++{
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	if (trigger_data) {
++		unregister_netdevice_notifier(&trigger_data->notifier);
++
++		device_remove_file(led_cdev->dev, &dev_attr_device_name);
++		device_remove_file(led_cdev->dev, &dev_attr_link);
++		device_remove_file(led_cdev->dev, &dev_attr_rx);
++		device_remove_file(led_cdev->dev, &dev_attr_tx);
++		device_remove_file(led_cdev->dev, &dev_attr_interval);
++
++		cancel_delayed_work_sync(&trigger_data->work);
++
++		if (trigger_data->net_dev)
++			dev_put(trigger_data->net_dev);
++
++		kfree(trigger_data);
++	}
++}
++
++static struct led_trigger netdev_led_trigger = {
++	.name = "netdev",
++	.activate = netdev_trig_activate,
++	.deactivate = netdev_trig_deactivate,
++};
++
++static int __init netdev_trig_init(void)
++{
++	return led_trigger_register(&netdev_led_trigger);
++}
++
++static void __exit netdev_trig_exit(void)
++{
++	led_trigger_unregister(&netdev_led_trigger);
++}
++
++module_init(netdev_trig_init);
++module_exit(netdev_trig_exit);
++
++MODULE_AUTHOR("Ben Whitten <ben.whitten@gmail.com>");
++MODULE_AUTHOR("Oliver Jowett <oliver@opencloud.com>");
++MODULE_DESCRIPTION("Netdev LED trigger");
++MODULE_LICENSE("GPL v2");
diff --git a/target/linux/generic/backport-4.9/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch b/target/linux/generic/backport-4.9/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch
new file mode 100644
index 0000000000..bd58df63c0
--- /dev/null
+++ b/target/linux/generic/backport-4.9/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch
@@ -0,0 +1,588 @@
+From 06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 Mon Sep 17 00:00:00 2001
+From: Ben Whitten <ben.whitten@gmail.com>
+Date: Sun, 10 Dec 2017 21:17:55 +0000
+Subject: [PATCH] leds: trigger: Introduce a NETDEV trigger
+
+This commit introduces a NETDEV trigger for named device
+activity. Available triggers are link, rx, and tx.
+
+Signed-off-by: Ben Whitten <ben.whitten@gmail.com>
+Acked-by: Pavel Machek <pavel@ucw.cz>
+Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
+---
+ .../ABI/testing/sysfs-class-led-trigger-netdev     |  45 ++
+ drivers/leds/trigger/Kconfig                       |   7 +
+ drivers/leds/trigger/Makefile                      |   1 +
+ drivers/leds/trigger/ledtrig-netdev.c              | 496 +++++++++++++++++++++
+ 4 files changed, 549 insertions(+)
+ create mode 100644 Documentation/ABI/testing/sysfs-class-led-trigger-netdev
+ create mode 100644 drivers/leds/trigger/ledtrig-netdev.c
+
+--- /dev/null
++++ b/Documentation/ABI/testing/sysfs-class-led-trigger-netdev
+@@ -0,0 +1,45 @@
++What:		/sys/class/leds/<led>/device_name
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Specifies the network device name to monitor.
++
++What:		/sys/class/leds/<led>/interval
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Specifies the duration of the LED blink in milliseconds.
++		Defaults to 50 ms.
++
++What:		/sys/class/leds/<led>/link
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Signal the link state of the named network device.
++		If set to 0 (default), the LED's normal state is off.
++		If set to 1, the LED's normal state reflects the link state
++		of the named network device.
++		Setting this value also immediately changes the LED state.
++
++What:		/sys/class/leds/<led>/tx
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Signal transmission of data on the named network device.
++		If set to 0 (default), the LED will not blink on transmission.
++		If set to 1, the LED will blink for the milliseconds specified
++		in interval to signal transmission.
++
++What:		/sys/class/leds/<led>/rx
++Date:		Dec 2017
++KernelVersion:	4.16
++Contact:	linux-leds@vger.kernel.org
++Description:
++		Signal reception of data on the named network device.
++		If set to 0 (default), the LED will not blink on reception.
++		If set to 1, the LED will blink for the milliseconds specified
++		in interval to signal reception.
+--- a/drivers/leds/trigger/Kconfig
++++ b/drivers/leds/trigger/Kconfig
+@@ -126,4 +126,11 @@ config LEDS_TRIGGER_PANIC
+ 	  a different trigger.
+ 	  If unsure, say Y.
+ 
++config LEDS_TRIGGER_NETDEV
++	tristate "LED Netdev Trigger"
++	depends on NET && LEDS_TRIGGERS
++	help
++	  This allows LEDs to be controlled by network device activity.
++	  If unsure, say Y.
++
+ endif # LEDS_TRIGGERS
+--- a/drivers/leds/trigger/Makefile
++++ b/drivers/leds/trigger/Makefile
+@@ -10,3 +10,4 @@ obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON)	+=
+ obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT)	+= ledtrig-transient.o
+ obj-$(CONFIG_LEDS_TRIGGER_CAMERA)	+= ledtrig-camera.o
+ obj-$(CONFIG_LEDS_TRIGGER_PANIC)	+= ledtrig-panic.o
++obj-$(CONFIG_LEDS_TRIGGER_NETDEV)	+= ledtrig-netdev.o
+--- /dev/null
++++ b/drivers/leds/trigger/ledtrig-netdev.c
+@@ -0,0 +1,496 @@
++// SPDX-License-Identifier: GPL-2.0
++// Copyright 2017 Ben Whitten <ben.whitten@gmail.com>
++// Copyright 2007 Oliver Jowett <oliver@opencloud.com>
++//
++// LED Kernel Netdev Trigger
++//
++// Toggles the LED to reflect the link and traffic state of a named net device
++//
++// Derived from ledtrig-timer.c which is:
++//  Copyright 2005-2006 Openedhand Ltd.
++//  Author: Richard Purdie <rpurdie@openedhand.com>
++
++#include <linux/atomic.h>
++#include <linux/ctype.h>
++#include <linux/device.h>
++#include <linux/init.h>
++#include <linux/jiffies.h>
++#include <linux/kernel.h>
++#include <linux/leds.h>
++#include <linux/list.h>
++#include <linux/module.h>
++#include <linux/netdevice.h>
++#include <linux/spinlock.h>
++#include <linux/timer.h>
++#include "../leds.h"
++
++/*
++ * Configurable sysfs attributes:
++ *
++ * device_name - network device name to monitor
++ * interval - duration of LED blink, in milliseconds
++ * link -  LED's normal state reflects whether the link is up
++ *         (has carrier) or not
++ * tx -  LED blinks on transmitted data
++ * rx -  LED blinks on receive data
++ *
++ */
++
++struct led_netdev_data {
++	spinlock_t lock;
++
++	struct delayed_work work;
++	struct notifier_block notifier;
++
++	struct led_classdev *led_cdev;
++	struct net_device *net_dev;
++
++	char device_name[IFNAMSIZ];
++	atomic_t interval;
++	unsigned int last_activity;
++
++	unsigned long mode;
++#define NETDEV_LED_LINK	0
++#define NETDEV_LED_TX	1
++#define NETDEV_LED_RX	2
++#define NETDEV_LED_MODE_LINKUP	3
++};
++
++enum netdev_led_attr {
++	NETDEV_ATTR_LINK,
++	NETDEV_ATTR_TX,
++	NETDEV_ATTR_RX
++};
++
++static void set_baseline_state(struct led_netdev_data *trigger_data)
++{
++	int current_brightness;
++	struct led_classdev *led_cdev = trigger_data->led_cdev;
++
++	current_brightness = led_cdev->brightness;
++	if (current_brightness)
++		led_cdev->blink_brightness = current_brightness;
++	if (!led_cdev->blink_brightness)
++		led_cdev->blink_brightness = led_cdev->max_brightness;
++
++	if (!test_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode))
++		led_set_brightness(led_cdev, LED_OFF);
++	else {
++		if (test_bit(NETDEV_LED_LINK, &trigger_data->mode))
++			led_set_brightness(led_cdev,
++					   led_cdev->blink_brightness);
++		else
++			led_set_brightness(led_cdev, LED_OFF);
++
++		/* If we are looking for RX/TX start periodically
++		 * checking stats
++		 */
++		if (test_bit(NETDEV_LED_TX, &trigger_data->mode) ||
++		    test_bit(NETDEV_LED_RX, &trigger_data->mode))
++			schedule_delayed_work(&trigger_data->work, 0);
++	}
++}
++
++static ssize_t device_name_show(struct device *dev,
++				struct device_attribute *attr, char *buf)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	ssize_t len;
++
++	spin_lock_bh(&trigger_data->lock);
++	len = sprintf(buf, "%s\n", trigger_data->device_name);
++	spin_unlock_bh(&trigger_data->lock);
++
++	return len;
++}
++
++static ssize_t device_name_store(struct device *dev,
++				 struct device_attribute *attr, const char *buf,
++				 size_t size)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	if (size >= IFNAMSIZ)
++		return -EINVAL;
++
++	cancel_delayed_work_sync(&trigger_data->work);
++
++	spin_lock_bh(&trigger_data->lock);
++
++	if (trigger_data->net_dev) {
++		dev_put(trigger_data->net_dev);
++		trigger_data->net_dev = NULL;
++	}
++
++	strncpy(trigger_data->device_name, buf, size);
++	if (size > 0 && trigger_data->device_name[size - 1] == '\n')
++		trigger_data->device_name[size - 1] = 0;
++
++	if (trigger_data->device_name[0] != 0)
++		trigger_data->net_dev =
++		    dev_get_by_name(&init_net, trigger_data->device_name);
++
++	clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
++	if (trigger_data->net_dev != NULL)
++		if (netif_carrier_ok(trigger_data->net_dev))
++			set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
++
++	trigger_data->last_activity = 0;
++
++	set_baseline_state(trigger_data);
++	spin_unlock_bh(&trigger_data->lock);
++
++	return size;
++}
++
++static DEVICE_ATTR_RW(device_name);
++
++static ssize_t netdev_led_attr_show(struct device *dev, char *buf,
++	enum netdev_led_attr attr)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	int bit;
++
++	switch (attr) {
++	case NETDEV_ATTR_LINK:
++		bit = NETDEV_LED_LINK;
++		break;
++	case NETDEV_ATTR_TX:
++		bit = NETDEV_LED_TX;
++		break;
++	case NETDEV_ATTR_RX:
++		bit = NETDEV_LED_RX;
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	return sprintf(buf, "%u\n", test_bit(bit, &trigger_data->mode));
++}
++
++static ssize_t netdev_led_attr_store(struct device *dev, const char *buf,
++	size_t size, enum netdev_led_attr attr)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	unsigned long state;
++	int ret;
++	int bit;
++
++	ret = kstrtoul(buf, 0, &state);
++	if (ret)
++		return ret;
++
++	switch (attr) {
++	case NETDEV_ATTR_LINK:
++		bit = NETDEV_LED_LINK;
++		break;
++	case NETDEV_ATTR_TX:
++		bit = NETDEV_LED_TX;
++		break;
++	case NETDEV_ATTR_RX:
++		bit = NETDEV_LED_RX;
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	cancel_delayed_work_sync(&trigger_data->work);
++
++	if (state)
++		set_bit(bit, &trigger_data->mode);
++	else
++		clear_bit(bit, &trigger_data->mode);
++
++	set_baseline_state(trigger_data);
++
++	return size;
++}
++
++static ssize_t link_show(struct device *dev,
++	struct device_attribute *attr, char *buf)
++{
++	return netdev_led_attr_show(dev, buf, NETDEV_ATTR_LINK);
++}
++
++static ssize_t link_store(struct device *dev,
++	struct device_attribute *attr, const char *buf, size_t size)
++{
++	return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_LINK);
++}
++
++static DEVICE_ATTR_RW(link);
++
++static ssize_t tx_show(struct device *dev,
++	struct device_attribute *attr, char *buf)
++{
++	return netdev_led_attr_show(dev, buf, NETDEV_ATTR_TX);
++}
++
++static ssize_t tx_store(struct device *dev,
++	struct device_attribute *attr, const char *buf, size_t size)
++{
++	return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_TX);
++}
++
++static DEVICE_ATTR_RW(tx);
++
++static ssize_t rx_show(struct device *dev,
++	struct device_attribute *attr, char *buf)
++{
++	return netdev_led_attr_show(dev, buf, NETDEV_ATTR_RX);
++}
++
++static ssize_t rx_store(struct device *dev,
++	struct device_attribute *attr, const char *buf, size_t size)
++{
++	return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_RX);
++}
++
++static DEVICE_ATTR_RW(rx);
++
++static ssize_t interval_show(struct device *dev,
++			     struct device_attribute *attr, char *buf)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	return sprintf(buf, "%u\n",
++		       jiffies_to_msecs(atomic_read(&trigger_data->interval)));
++}
++
++static ssize_t interval_store(struct device *dev,
++			      struct device_attribute *attr, const char *buf,
++			      size_t size)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	unsigned long value;
++	int ret;
++
++	ret = kstrtoul(buf, 0, &value);
++	if (ret)
++		return ret;
++
++	/* impose some basic bounds on the timer interval */
++	if (value >= 5 && value <= 10000) {
++		cancel_delayed_work_sync(&trigger_data->work);
++
++		atomic_set(&trigger_data->interval, msecs_to_jiffies(value));
++		set_baseline_state(trigger_data);	/* resets timer */
++	}
++
++	return size;
++}
++
++static DEVICE_ATTR_RW(interval);
++
++static int netdev_trig_notify(struct notifier_block *nb,
++			      unsigned long evt, void *dv)
++{
++	struct net_device *dev =
++		netdev_notifier_info_to_dev((struct netdev_notifier_info *)dv);
++	struct led_netdev_data *trigger_data = container_of(nb,
++							    struct
++							    led_netdev_data,
++							    notifier);
++
++	if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE
++	    && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER
++	    && evt != NETDEV_CHANGENAME)
++		return NOTIFY_DONE;
++
++	if (strcmp(dev->name, trigger_data->device_name))
++		return NOTIFY_DONE;
++
++	cancel_delayed_work_sync(&trigger_data->work);
++
++	spin_lock_bh(&trigger_data->lock);
++
++	clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
++	switch (evt) {
++	case NETDEV_REGISTER:
++		if (trigger_data->net_dev)
++			dev_put(trigger_data->net_dev);
++		dev_hold(dev);
++		trigger_data->net_dev = dev;
++		break;
++	case NETDEV_CHANGENAME:
++	case NETDEV_UNREGISTER:
++		if (trigger_data->net_dev) {
++			dev_put(trigger_data->net_dev);
++			trigger_data->net_dev = NULL;
++		}
++		break;
++	case NETDEV_UP:
++	case NETDEV_CHANGE:
++		if (netif_carrier_ok(dev))
++			set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
++		break;
++	}
++
++	set_baseline_state(trigger_data);
++
++	spin_unlock_bh(&trigger_data->lock);
++
++	return NOTIFY_DONE;
++}
++
++/* here's the real work! */
++static void netdev_trig_work(struct work_struct *work)
++{
++	struct led_netdev_data *trigger_data = container_of(work,
++							    struct
++							    led_netdev_data,
++							    work.work);
++	struct rtnl_link_stats64 *dev_stats;
++	unsigned int new_activity;
++	struct rtnl_link_stats64 temp;
++	unsigned long interval;
++	int invert;
++
++	/* If we dont have a device, insure we are off */
++	if (!trigger_data->net_dev) {
++		led_set_brightness(trigger_data->led_cdev, LED_OFF);
++		return;
++	}
++
++	/* If we are not looking for RX/TX then return  */
++	if (!test_bit(NETDEV_LED_TX, &trigger_data->mode) &&
++	    !test_bit(NETDEV_LED_RX, &trigger_data->mode))
++		return;
++
++	dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
++	new_activity =
++	    (test_bit(NETDEV_LED_TX, &trigger_data->mode) ?
++		dev_stats->tx_packets : 0) +
++	    (test_bit(NETDEV_LED_RX, &trigger_data->mode) ?
++		dev_stats->rx_packets : 0);
++
++	if (trigger_data->last_activity != new_activity) {
++		led_stop_software_blink(trigger_data->led_cdev);
++
++		invert = test_bit(NETDEV_LED_LINK, &trigger_data->mode);
++		interval = jiffies_to_msecs(
++				atomic_read(&trigger_data->interval));
++		/* base state is ON (link present) */
++		led_blink_set_oneshot(trigger_data->led_cdev,
++				      &interval,
++				      &interval,
++				      invert);
++		trigger_data->last_activity = new_activity;
++	}
++
++	schedule_delayed_work(&trigger_data->work,
++			(atomic_read(&trigger_data->interval)*2));
++}
++
++static void netdev_trig_activate(struct led_classdev *led_cdev)
++{
++	struct led_netdev_data *trigger_data;
++	int rc;
++
++	trigger_data = kzalloc(sizeof(struct led_netdev_data), GFP_KERNEL);
++	if (!trigger_data)
++		return;
++
++	spin_lock_init(&trigger_data->lock);
++
++	trigger_data->notifier.notifier_call = netdev_trig_notify;
++	trigger_data->notifier.priority = 10;
++
++	INIT_DELAYED_WORK(&trigger_data->work, netdev_trig_work);
++
++	trigger_data->led_cdev = led_cdev;
++	trigger_data->net_dev = NULL;
++	trigger_data->device_name[0] = 0;
++
++	trigger_data->mode = 0;
++	atomic_set(&trigger_data->interval, msecs_to_jiffies(50));
++	trigger_data->last_activity = 0;
++
++	led_cdev->trigger_data = trigger_data;
++
++	rc = device_create_file(led_cdev->dev, &dev_attr_device_name);
++	if (rc)
++		goto err_out;
++	rc = device_create_file(led_cdev->dev, &dev_attr_link);
++	if (rc)
++		goto err_out_device_name;
++	rc = device_create_file(led_cdev->dev, &dev_attr_rx);
++	if (rc)
++		goto err_out_link;
++	rc = device_create_file(led_cdev->dev, &dev_attr_tx);
++	if (rc)
++		goto err_out_rx;
++	rc = device_create_file(led_cdev->dev, &dev_attr_interval);
++	if (rc)
++		goto err_out_tx;
++	rc = register_netdevice_notifier(&trigger_data->notifier);
++	if (rc)
++		goto err_out_interval;
++	return;
++
++err_out_interval:
++	device_remove_file(led_cdev->dev, &dev_attr_interval);
++err_out_tx:
++	device_remove_file(led_cdev->dev, &dev_attr_tx);
++err_out_rx:
++	device_remove_file(led_cdev->dev, &dev_attr_rx);
++err_out_link:
++	device_remove_file(led_cdev->dev, &dev_attr_link);
++err_out_device_name:
++	device_remove_file(led_cdev->dev, &dev_attr_device_name);
++err_out:
++	led_cdev->trigger_data = NULL;
++	kfree(trigger_data);
++}
++
++static void netdev_trig_deactivate(struct led_classdev *led_cdev)
++{
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	if (trigger_data) {
++		unregister_netdevice_notifier(&trigger_data->notifier);
++
++		device_remove_file(led_cdev->dev, &dev_attr_device_name);
++		device_remove_file(led_cdev->dev, &dev_attr_link);
++		device_remove_file(led_cdev->dev, &dev_attr_rx);
++		device_remove_file(led_cdev->dev, &dev_attr_tx);
++		device_remove_file(led_cdev->dev, &dev_attr_interval);
++
++		cancel_delayed_work_sync(&trigger_data->work);
++
++		if (trigger_data->net_dev)
++			dev_put(trigger_data->net_dev);
++
++		kfree(trigger_data);
++	}
++}
++
++static struct led_trigger netdev_led_trigger = {
++	.name = "netdev",
++	.activate = netdev_trig_activate,
++	.deactivate = netdev_trig_deactivate,
++};
++
++static int __init netdev_trig_init(void)
++{
++	return led_trigger_register(&netdev_led_trigger);
++}
++
++static void __exit netdev_trig_exit(void)
++{
++	led_trigger_unregister(&netdev_led_trigger);
++}
++
++module_init(netdev_trig_init);
++module_exit(netdev_trig_exit);
++
++MODULE_AUTHOR("Ben Whitten <ben.whitten@gmail.com>");
++MODULE_AUTHOR("Oliver Jowett <oliver@opencloud.com>");
++MODULE_DESCRIPTION("Netdev LED trigger");
++MODULE_LICENSE("GPL v2");
diff --git a/target/linux/generic/files/drivers/leds/ledtrig-netdev.c b/target/linux/generic/files/drivers/leds/ledtrig-netdev.c
deleted file mode 100644
index 8d3249010d..0000000000
--- a/target/linux/generic/files/drivers/leds/ledtrig-netdev.c
+++ /dev/null
@@ -1,444 +0,0 @@
-/*
- * LED Kernel Netdev Trigger
- *
- * Toggles the LED to reflect the link and traffic state of a named net device
- *
- * Copyright 2007 Oliver Jowett <oliver@opencloud.com>
- *
- * Derived from ledtrig-timer.c which is:
- *  Copyright 2005-2006 Openedhand Ltd.
- *  Author: Richard Purdie <rpurdie@openedhand.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 <linux/module.h>
-#include <linux/jiffies.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/device.h>
-#include <linux/netdevice.h>
-#include <linux/timer.h>
-#include <linux/ctype.h>
-#include <linux/leds.h>
-
-#include "leds.h"
-
-/*
- * Configurable sysfs attributes:
- *
- * device_name - network device name to monitor
- *
- * interval - duration of LED blink, in milliseconds
- *
- * mode - either "none" (LED is off) or a space separated list of one or more of:
- *   link: LED's normal state reflects whether the link is up (has carrier) or not
- *   tx:   LED blinks on transmitted data
- *   rx:   LED blinks on receive data
- *
- * Some suggestions:
- *
- *  Simple link status LED:
- *  $ echo netdev >someled/trigger
- *  $ echo eth0 >someled/device_name
- *  $ echo link >someled/mode
- *
- *  Ethernet-style link/activity LED:
- *  $ echo netdev >someled/trigger
- *  $ echo eth0 >someled/device_name
- *  $ echo "link tx rx" >someled/mode
- *
- *  Modem-style tx/rx LEDs:
- *  $ echo netdev >led1/trigger
- *  $ echo ppp0 >led1/device_name
- *  $ echo tx >led1/mode
- *  $ echo netdev >led2/trigger
- *  $ echo ppp0 >led2/device_name
- *  $ echo rx >led2/mode
- *
- */
-
-#define MODE_LINK 1
-#define MODE_TX   2
-#define MODE_RX   4
-
-struct led_netdev_data {
-	spinlock_t lock;
-
-	struct delayed_work work;
-	struct notifier_block notifier;
-
-	struct led_classdev *led_cdev;
-	struct net_device *net_dev;
-
-	char device_name[IFNAMSIZ];
-	unsigned interval;
-	unsigned mode;
-	unsigned link_up;
-	unsigned last_activity;
-};
-
-static void set_baseline_state(struct led_netdev_data *trigger_data)
-{
-	if ((trigger_data->mode & MODE_LINK) != 0 && trigger_data->link_up)
-		led_set_brightness(trigger_data->led_cdev, LED_FULL);
-	else
-		led_set_brightness(trigger_data->led_cdev, LED_OFF);
-
-	if ((trigger_data->mode & (MODE_TX | MODE_RX)) != 0 && trigger_data->link_up)
-		schedule_delayed_work(&trigger_data->work, trigger_data->interval);
-}
-
-static ssize_t led_device_name_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct led_classdev *led_cdev = dev_get_drvdata(dev);
-	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
-
-	spin_lock_bh(&trigger_data->lock);
-	sprintf(buf, "%s\n", trigger_data->device_name);
-	spin_unlock_bh(&trigger_data->lock);
-
-	return strlen(buf) + 1;
-}
-
-static ssize_t led_device_name_store(struct device *dev,
-		struct device_attribute *attr, const char *buf, size_t size)
-{
-	struct led_classdev *led_cdev = dev_get_drvdata(dev);
-	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
-
-	if (size >= IFNAMSIZ)
-		return -EINVAL;
-
-	cancel_delayed_work_sync(&trigger_data->work);
-
-	spin_lock_bh(&trigger_data->lock);
-
-	strcpy(trigger_data->device_name, buf);
-	if (size > 0 && trigger_data->device_name[size-1] == '\n')
-		trigger_data->device_name[size-1] = 0;
-	trigger_data->link_up = 0;
-	trigger_data->last_activity = 0;
-
-	if (trigger_data->device_name[0] != 0) {
-		/* check for existing device to update from */
-		trigger_data->net_dev = dev_get_by_name(&init_net, trigger_data->device_name);
-		if (trigger_data->net_dev != NULL)
-			trigger_data->link_up = (dev_get_flags(trigger_data->net_dev) & IFF_LOWER_UP) != 0;
-	}
-
-	set_baseline_state(trigger_data);
-	spin_unlock_bh(&trigger_data->lock);
-
-	return size;
-}
-
-static DEVICE_ATTR(device_name, 0644, led_device_name_show, led_device_name_store);
-
-static ssize_t led_mode_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct led_classdev *led_cdev = dev_get_drvdata(dev);
-	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
-
-	spin_lock_bh(&trigger_data->lock);
-
-	if (trigger_data->mode == 0) {
-		strcpy(buf, "none\n");
-	} else {
-		if (trigger_data->mode & MODE_LINK)
-			strcat(buf, "link ");
-		if (trigger_data->mode & MODE_TX)
-			strcat(buf, "tx ");
-		if (trigger_data->mode & MODE_RX)
-			strcat(buf, "rx ");
-		strcat(buf, "\n");
-	}
-
-	spin_unlock_bh(&trigger_data->lock);
-
-	return strlen(buf)+1;
-}
-
-static ssize_t led_mode_store(struct device *dev,
-		struct device_attribute *attr, const char *buf, size_t size)
-{
-	struct led_classdev *led_cdev = dev_get_drvdata(dev);
-	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
-	char copybuf[128];
-	int new_mode = -1;
-	char *p, *token;
-
-	/* take a copy since we don't want to trash the inbound buffer when using strsep */
-	strncpy(copybuf, buf, sizeof(copybuf));
-	copybuf[sizeof(copybuf) - 1] = 0;
-	p = copybuf;
-
-	while ((token = strsep(&p, " \t\n")) != NULL) {
-		if (!*token)
-			continue;
-
-		if (new_mode == -1)
-			new_mode = 0;
-
-		if (!strcmp(token, "none"))
-			new_mode = 0;
-		else if (!strcmp(token, "tx"))
-			new_mode |= MODE_TX;
-		else if (!strcmp(token, "rx"))
-			new_mode |= MODE_RX;
-		else if (!strcmp(token, "link"))
-			new_mode |= MODE_LINK;
-		else
-			return -EINVAL;
-	}
-
-	if (new_mode == -1)
-		return -EINVAL;
-
-	cancel_delayed_work_sync(&trigger_data->work);
-
-	spin_lock_bh(&trigger_data->lock);
-	trigger_data->mode = new_mode;
-	set_baseline_state(trigger_data);
-	spin_unlock_bh(&trigger_data->lock);
-
-	return size;
-}
-
-static DEVICE_ATTR(mode, 0644, led_mode_show, led_mode_store);
-
-static ssize_t led_interval_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct led_classdev *led_cdev = dev_get_drvdata(dev);
-	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
-
-	spin_lock_bh(&trigger_data->lock);
-	sprintf(buf, "%u\n", jiffies_to_msecs(trigger_data->interval));
-	spin_unlock_bh(&trigger_data->lock);
-
-	return strlen(buf) + 1;
-}
-
-static ssize_t led_interval_store(struct device *dev,
-		struct device_attribute *attr, const char *buf, size_t size)
-{
-	struct led_classdev *led_cdev = dev_get_drvdata(dev);
-	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
-	int ret = -EINVAL;
-	char *after;
-	unsigned long value = simple_strtoul(buf, &after, 10);
-	size_t count = after - buf;
-
-	if (isspace(*after))
-		count++;
-
-	/* impose some basic bounds on the timer interval */
-	if (count == size && value >= 5 && value <= 10000) {
-		cancel_delayed_work_sync(&trigger_data->work);
-
-		spin_lock_bh(&trigger_data->lock);
-		trigger_data->interval = msecs_to_jiffies(value);
-		set_baseline_state(trigger_data); /* resets timer */
-		spin_unlock_bh(&trigger_data->lock);
-
-		ret = count;
-	}
-
-	return ret;
-}
-
-static DEVICE_ATTR(interval, 0644, led_interval_show, led_interval_store);
-
-static int netdev_trig_notify(struct notifier_block *nb,
-			      unsigned long evt,
-			      void *dv)
-{
-	struct net_device *dev = netdev_notifier_info_to_dev((struct netdev_notifier_info *) dv);
-	struct led_netdev_data *trigger_data = container_of(nb, struct led_netdev_data, notifier);
-
-	if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER && evt != NETDEV_CHANGENAME)
-		return NOTIFY_DONE;
-
-	if (strcmp(dev->name, trigger_data->device_name))
-		return NOTIFY_DONE;
-
-	cancel_delayed_work_sync(&trigger_data->work);
-
-	spin_lock_bh(&trigger_data->lock);
-
-	if (evt == NETDEV_REGISTER || evt == NETDEV_CHANGENAME) {
-		if (trigger_data->net_dev != NULL)
-			dev_put(trigger_data->net_dev);
-
-		dev_hold(dev);
-		trigger_data->net_dev = dev;
-		trigger_data->link_up = 0;
-		goto done;
-	}
-
-	if (evt == NETDEV_UNREGISTER && trigger_data->net_dev != NULL) {
-		dev_put(trigger_data->net_dev);
-		trigger_data->net_dev = NULL;
-		goto done;
-	}
-
-	/* UP / DOWN / CHANGE */
-
-	trigger_data->link_up = (evt != NETDEV_DOWN && netif_carrier_ok(dev));
-	set_baseline_state(trigger_data);
-
-done:
-	spin_unlock_bh(&trigger_data->lock);
-	return NOTIFY_DONE;
-}
-
-/* here's the real work! */
-static void netdev_trig_work(struct work_struct *work)
-{
-	struct led_netdev_data *trigger_data = container_of(work, struct led_netdev_data, work.work);
-	struct rtnl_link_stats64 *dev_stats;
-	unsigned new_activity;
-	struct rtnl_link_stats64 temp;
-
-	if (!trigger_data->link_up || !trigger_data->net_dev || (trigger_data->mode & (MODE_TX | MODE_RX)) == 0) {
-		/* we don't need to do timer work, just reflect link state. */
-		led_set_brightness(trigger_data->led_cdev, ((trigger_data->mode & MODE_LINK) != 0 && trigger_data->link_up) ? LED_FULL : LED_OFF);
-		return;
-	}
-
-	dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
-	new_activity =
-		((trigger_data->mode & MODE_TX) ? dev_stats->tx_packets : 0) +
-		((trigger_data->mode & MODE_RX) ? dev_stats->rx_packets : 0);
-
-	if (trigger_data->mode & MODE_LINK) {
-		/* base state is ON (link present) */
-		/* if there's no link, we don't get this far and the LED is off */
-
-		/* OFF -> ON always */
-		/* ON -> OFF on activity */
-		if (trigger_data->led_cdev->brightness == LED_OFF) {
-			led_set_brightness(trigger_data->led_cdev, LED_FULL);
-		} else if (trigger_data->last_activity != new_activity) {
-			led_set_brightness(trigger_data->led_cdev, LED_OFF);
-		}
-	} else {
-		/* base state is OFF */
-		/* ON -> OFF always */
-		/* OFF -> ON on activity */
-		if (trigger_data->led_cdev->brightness == LED_FULL) {
-			led_set_brightness(trigger_data->led_cdev, LED_OFF);
-		} else if (trigger_data->last_activity != new_activity) {
-			led_set_brightness(trigger_data->led_cdev, LED_FULL);
-		}
-	}
-
-	trigger_data->last_activity = new_activity;
-	schedule_delayed_work(&trigger_data->work, trigger_data->interval);
-}
-
-static void netdev_trig_activate(struct led_classdev *led_cdev)
-{
-	struct led_netdev_data *trigger_data;
-	int rc;
-
-	trigger_data = kzalloc(sizeof(struct led_netdev_data), GFP_KERNEL);
-	if (!trigger_data)
-		return;
-
-	spin_lock_init(&trigger_data->lock);
-
-	trigger_data->notifier.notifier_call = netdev_trig_notify;
-	trigger_data->notifier.priority = 10;
-
-	INIT_DELAYED_WORK(&trigger_data->work, netdev_trig_work);
-
-	trigger_data->led_cdev = led_cdev;
-	trigger_data->net_dev = NULL;
-	trigger_data->device_name[0] = 0;
-
-	trigger_data->mode = 0;
-	trigger_data->interval = msecs_to_jiffies(50);
-	trigger_data->link_up = 0;
-	trigger_data->last_activity = 0;
-
-	led_cdev->trigger_data = trigger_data;
-
-	rc = device_create_file(led_cdev->dev, &dev_attr_device_name);
-	if (rc)
-		goto err_out;
-	rc = device_create_file(led_cdev->dev, &dev_attr_mode);
-	if (rc)
-		goto err_out_device_name;
-	rc = device_create_file(led_cdev->dev, &dev_attr_interval);
-	if (rc)
-		goto err_out_mode;
-
-	register_netdevice_notifier(&trigger_data->notifier);
-	return;
-
-err_out_mode:
-	device_remove_file(led_cdev->dev, &dev_attr_mode);
-err_out_device_name:
-	device_remove_file(led_cdev->dev, &dev_attr_device_name);
-err_out:
-	led_cdev->trigger_data = NULL;
-	kfree(trigger_data);
-}
-
-static void netdev_trig_deactivate(struct led_classdev *led_cdev)
-{
-	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
-
-	if (trigger_data) {
-		unregister_netdevice_notifier(&trigger_data->notifier);
-
-		device_remove_file(led_cdev->dev, &dev_attr_device_name);
-		device_remove_file(led_cdev->dev, &dev_attr_mode);
-		device_remove_file(led_cdev->dev, &dev_attr_interval);
-
-		cancel_delayed_work_sync(&trigger_data->work);
-
-		spin_lock_bh(&trigger_data->lock);
-
-		if (trigger_data->net_dev) {
-			dev_put(trigger_data->net_dev);
-			trigger_data->net_dev = NULL;
-		}
-
-		spin_unlock_bh(&trigger_data->lock);
-
-		kfree(trigger_data);
-	}
-}
-
-static struct led_trigger netdev_led_trigger = {
-	.name     = "netdev",
-	.activate = netdev_trig_activate,
-	.deactivate = netdev_trig_deactivate,
-};
-
-static int __init netdev_trig_init(void)
-{
-	return led_trigger_register(&netdev_led_trigger);
-}
-
-static void __exit netdev_trig_exit(void)
-{
-	led_trigger_unregister(&netdev_led_trigger);
-}
-
-module_init(netdev_trig_init);
-module_exit(netdev_trig_exit);
-
-MODULE_AUTHOR("Oliver Jowett <oliver@opencloud.com>");
-MODULE_DESCRIPTION("Netdev LED trigger");
-MODULE_LICENSE("GPL");
diff --git a/target/linux/generic/pending-3.18/831-ledtrig_netdev.patch b/target/linux/generic/pending-3.18/831-ledtrig_netdev.patch
deleted file mode 100644
index 3b46b4a9f4..0000000000
--- a/target/linux/generic/pending-3.18/831-ledtrig_netdev.patch
+++ /dev/null
@@ -1,21 +0,0 @@
---- a/drivers/leds/trigger/Kconfig
-+++ b/drivers/leds/trigger/Kconfig
-@@ -108,4 +108,11 @@ config LEDS_TRIGGER_CAMERA
- 	  This enables direct flash/torch on/off by the driver, kernel space.
- 	  If unsure, say Y.
- 
-+config LEDS_TRIGGER_NETDEV
-+	tristate "LED Netdev Trigger"
-+	depends on NET && LEDS_TRIGGERS
-+	help
-+	  This allows LEDs to be controlled by network device activity.
-+	  If unsure, say Y.
-+
- endif # LEDS_TRIGGERS
---- a/drivers/leds/Makefile
-+++ b/drivers/leds/Makefile
-@@ -62,3 +62,4 @@ obj-$(CONFIG_LEDS_DAC124S085)		+= leds-d
- 
- # LED Triggers
- obj-$(CONFIG_LEDS_TRIGGERS)		+= trigger/
-+obj-$(CONFIG_LEDS_TRIGGER_NETDEV)	+= ledtrig-netdev.o
diff --git a/target/linux/generic/pending-4.14/831-ledtrig_netdev.patch b/target/linux/generic/pending-4.14/831-ledtrig_netdev.patch
deleted file mode 100644
index a12e6dba96..0000000000
--- a/target/linux/generic/pending-4.14/831-ledtrig_netdev.patch
+++ /dev/null
@@ -1,74 +0,0 @@
-From: Alexey Brodkin <abrodkin@synopsys.com>
-Subject: usb: Remove annoying warning about bogus URB
-
-When ath9k-htc Wi-Fi dongle is used with generic OHCI controller
-infinite stream of warnings appears in debug console like this:
--------------------------->8----------------------
-usb 1-1: new full-speed USB device number 2 using ohci-platform
-usb 1-1: ath9k_htc: Firmware ath9k_htc/htc_9271-1.4.0.fw requested
-usb 1-1: ath9k_htc: Transferred FW: ath9k_htc/htc_9271-1.4.0.fw, size:
-51008
-------------[ cut here ]------------
-WARNING: CPU: 0 PID: 19 at drivers/usb/core/urb.c:449
-usb_submit_urb+0x1b4/0x498()
-usb 1-1: BOGUS urb xfer, pipe 1 != type 3
-Modules linked in:
-CPU: 0 PID: 19 Comm: kworker/0:1 Not tainted
-4.4.0-rc4-00017-g00e2d79-dirty #3
-Workqueue: events request_firmware_work_func
-
-Stack Trace:
-arc_unwind_core.constprop.1+0xa4/0x110
----[ end trace 649ef8c342817fc2 ]---
-------------[ cut here ]------------
-WARNING: CPU: 0 PID: 19 at drivers/usb/core/urb.c:449
-usb_submit_urb+0x1b4/0x498()
-usb 1-1: BOGUS urb xfer, pipe 1 != type 3
-Modules linked in:
-CPU: 0 PID: 19 Comm: kworker/0:1 Tainted: G        W
-4.4.0-rc4-00017-g00e2d79-dirty #3
-Workqueue: events request_firmware_work_func
-
-Stack Trace:
-arc_unwind_core.constprop.1+0xa4/0x110
----[ end trace 649ef8c342817fc3 ]---
-------------[ cut here ]------------
--------------------------->8----------------------
-
-There're some discussions in mailing lists proposing to disable
-that particular check alltogether and magically all seem to work
-fine with muted warning.
-
-Anyways new thread on that regard could be found here:
-http://lists.infradead.org/pipermail/linux-snps-arc/2016-July/001310.html
-
-Let's see what comes out of that new discussion, hopefully patching
-of generic USB stuff won't be required then.
-
-Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
----
- drivers/leds/Makefile        | 1 +
- drivers/leds/trigger/Kconfig | 7 +++++++
- 2 files changed, 8 insertions(+)
-
---- a/drivers/leds/Makefile
-+++ b/drivers/leds/Makefile
-@@ -82,3 +82,4 @@ obj-$(CONFIG_LEDS_USER)			+= uleds.o
- 
- # LED Triggers
- obj-$(CONFIG_LEDS_TRIGGERS)		+= trigger/
-+obj-$(CONFIG_LEDS_TRIGGER_NETDEV)	+= ledtrig-netdev.o
---- a/drivers/leds/trigger/Kconfig
-+++ b/drivers/leds/trigger/Kconfig
-@@ -126,4 +126,11 @@ config LEDS_TRIGGER_PANIC
- 	  a different trigger.
- 	  If unsure, say Y.
- 
-+config LEDS_TRIGGER_NETDEV
-+	tristate "LED Netdev Trigger"
-+	depends on NET && LEDS_TRIGGERS
-+	help
-+	  This allows LEDs to be controlled by network device activity.
-+	  If unsure, say Y.
-+
- endif # LEDS_TRIGGERS
diff --git a/target/linux/generic/pending-4.9/831-ledtrig_netdev.patch b/target/linux/generic/pending-4.9/831-ledtrig_netdev.patch
deleted file mode 100644
index 037ec9bb2d..0000000000
--- a/target/linux/generic/pending-4.9/831-ledtrig_netdev.patch
+++ /dev/null
@@ -1,74 +0,0 @@
-From: Alexey Brodkin <abrodkin@synopsys.com>
-Subject: usb: Remove annoying warning about bogus URB
-
-When ath9k-htc Wi-Fi dongle is used with generic OHCI controller
-infinite stream of warnings appears in debug console like this:
--------------------------->8----------------------
-usb 1-1: new full-speed USB device number 2 using ohci-platform
-usb 1-1: ath9k_htc: Firmware ath9k_htc/htc_9271-1.4.0.fw requested
-usb 1-1: ath9k_htc: Transferred FW: ath9k_htc/htc_9271-1.4.0.fw, size:
-51008
-------------[ cut here ]------------
-WARNING: CPU: 0 PID: 19 at drivers/usb/core/urb.c:449
-usb_submit_urb+0x1b4/0x498()
-usb 1-1: BOGUS urb xfer, pipe 1 != type 3
-Modules linked in:
-CPU: 0 PID: 19 Comm: kworker/0:1 Not tainted
-4.4.0-rc4-00017-g00e2d79-dirty #3
-Workqueue: events request_firmware_work_func
-
-Stack Trace:
-arc_unwind_core.constprop.1+0xa4/0x110
----[ end trace 649ef8c342817fc2 ]---
-------------[ cut here ]------------
-WARNING: CPU: 0 PID: 19 at drivers/usb/core/urb.c:449
-usb_submit_urb+0x1b4/0x498()
-usb 1-1: BOGUS urb xfer, pipe 1 != type 3
-Modules linked in:
-CPU: 0 PID: 19 Comm: kworker/0:1 Tainted: G        W
-4.4.0-rc4-00017-g00e2d79-dirty #3
-Workqueue: events request_firmware_work_func
-
-Stack Trace:
-arc_unwind_core.constprop.1+0xa4/0x110
----[ end trace 649ef8c342817fc3 ]---
-------------[ cut here ]------------
--------------------------->8----------------------
-
-There're some discussions in mailing lists proposing to disable
-that particular check alltogether and magically all seem to work
-fine with muted warning.
-
-Anyways new thread on that regard could be found here:
-http://lists.infradead.org/pipermail/linux-snps-arc/2016-July/001310.html
-
-Let's see what comes out of that new discussion, hopefully patching
-of generic USB stuff won't be required then.
-
-Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
----
- drivers/leds/Makefile        | 1 +
- drivers/leds/trigger/Kconfig | 7 +++++++
- 2 files changed, 8 insertions(+)
-
---- a/drivers/leds/Makefile
-+++ b/drivers/leds/Makefile
-@@ -77,3 +77,4 @@ obj-$(CONFIG_LEDS_DAC124S085)		+= leds-d
- 
- # LED Triggers
- obj-$(CONFIG_LEDS_TRIGGERS)		+= trigger/
-+obj-$(CONFIG_LEDS_TRIGGER_NETDEV)	+= ledtrig-netdev.o
---- a/drivers/leds/trigger/Kconfig
-+++ b/drivers/leds/trigger/Kconfig
-@@ -126,4 +126,11 @@ config LEDS_TRIGGER_PANIC
- 	  a different trigger.
- 	  If unsure, say Y.
- 
-+config LEDS_TRIGGER_NETDEV
-+	tristate "LED Netdev Trigger"
-+	depends on NET && LEDS_TRIGGERS
-+	help
-+	  This allows LEDs to be controlled by network device activity.
-+	  If unsure, say Y.
-+
- endif # LEDS_TRIGGERS