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leds: heartbeat: stop on shutdown 

A halted kernel should not show a heartbeat.

[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Alexander 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Alexander Holler 2012-05-29 15:07:29 -07:00 committed by Linus Torvalds
parent 6335f8fa97
commit 49dca5aebf
1 changed files with 27 additions and 1 deletions
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28
drivers/leds/ledtrig-heartbeat.c
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@ -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);
}