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Commit 49dca5ae authored by Alexander Holler's avatar Alexander Holler Committed by Linus Torvalds
Browse files

leds: heartbeat: stop on shutdown 



A halted kernel should not show a heartbeat.

[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: default avatarAlexander Holler <holler@ahsoftware.de>
Cc: Shuah Khan <shuahkhan@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Bryan Wu <bryan.wu@canonical.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6335f8fa

drivers/leds/ledtrig-heartbeat.c

+27 −1
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/timer.h>

#include <linux/sched.h>

#include <linux/leds.h>

#include <linux/reboot.h>

#include "leds.h"



struct heartbeat_trig_data {
@@ -103,13 +104,38 @@ static struct led_trigger heartbeat_led_trigger = { 
	.deactivate = heartbeat_trig_deactivate,

};



static int heartbeat_reboot_notifier(struct notifier_block *nb,

				     unsigned long code, void *unused)

{

	led_trigger_unregister(&heartbeat_led_trigger);

	return NOTIFY_DONE;

}



static struct notifier_block heartbeat_reboot_nb = {

	.notifier_call = heartbeat_reboot_notifier,

};



static struct notifier_block heartbeat_panic_nb = {

	.notifier_call = heartbeat_reboot_notifier,

};



static int __init heartbeat_trig_init(void)

{

	return led_trigger_register(&heartbeat_led_trigger);

	int rc = led_trigger_register(&heartbeat_led_trigger);



	if (!rc) {

		atomic_notifier_chain_register(&panic_notifier_list,

					       &heartbeat_panic_nb);

		register_reboot_notifier(&heartbeat_reboot_nb);

	}

	return rc;

}



static void __exit heartbeat_trig_exit(void)

{

	unregister_reboot_notifier(&heartbeat_reboot_nb);

	atomic_notifier_chain_unregister(&panic_notifier_list,

					 &heartbeat_panic_nb);

	led_trigger_unregister(&heartbeat_led_trigger);

}