diff options
| author | Alexander Holler <holler@ahsoftware.de> | 2012-05-29 15:07:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-29 16:22:32 -0700 |
| commit | 49dca5aebfdeadd4bf27b6cb4c60392147dc35a4 (patch) | |
| tree | 99172a77186076842dce396469ea9d50f4d16c9f /drivers/leds | |
| parent | 6335f8fa974bc284da0f55877935538e1d7b55eb (diff) | |
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>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/ledtrig-heartbeat.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/leds/ledtrig-heartbeat.c b/drivers/leds/ledtrig-heartbeat.c index 1aacf4c6c3e..41dc76db431 100644 --- a/drivers/leds/ledtrig-heartbeat.c +++ b/drivers/leds/ledtrig-heartbeat.c @@ -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); } |