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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 <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/8a61e229-5388-46c7-919a-4d18cc7362b2@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Heiner Kallweit 2023-12-16 21:05:33 +01:00 committed by Greg Kroah-Hartman
parent 2cb659ef0a
commit 7d1c4e5809
1 changed files with 4 additions and 1 deletions
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5
drivers/leds/trigger/ledtrig-panic.c
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@ -64,10 +64,13 @@ static long led_panic_blink(int state)
static int __init ledtrig_panic_init(void) static int __init ledtrig_panic_init(void)
{ {
led_trigger_register_simple("panic", &trigger);
if (!trigger)
return -ENOMEM;
atomic_notifier_chain_register(&panic_notifier_list, atomic_notifier_chain_register(&panic_notifier_list,
&led_trigger_panic_nb); &led_trigger_panic_nb);
led_trigger_register_simple("panic", &trigger);
panic_blink = led_panic_blink; panic_blink = led_panic_blink;
return 0; return 0;
} }