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leds: trigger: panic: Don't register panic notifier if creating the trigger failed

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[ Upstream commit afacb21834bb02785ddb0c3ec197208803b74faa ]

It doesn't make sense to register the panic notifier if creating the
panic trigger failed.

Signed-off-by: Heiner Kallweit <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Heiner Kallweit 2023-12-16 21:05:33 +01:00 • committed by Greg Kroah-Hartman
commit ddd1f258f0
1 changed files with 4 additions and 1 deletions
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5
drivers/leds/trigger/ledtrig-panic.c
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@ -63,10 +63,13 @@ static long led_panic_blink(int state)
static int __init ledtrig_panic_init(void)
{
led_trigger_register_simple("panic", &trigger);
if (!trigger)
return -ENOMEM;
atomic_notifier_chain_register(&panic_notifier_list,
&led_trigger_panic_nb);
led_trigger_register_simple("panic", &trigger);
panic_blink = led_panic_blink;
return 0;
}