4.19-stable review patch. If anyone has any objections, please let me know.
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From: Heiner Kallweit hkallweit1@gmail.com
[ 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 --- drivers/leds/trigger/ledtrig-panic.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/leds/trigger/ledtrig-panic.c b/drivers/leds/trigger/ledtrig-panic.c index d735526b9db4..2fc04418a87e 100644 --- a/drivers/leds/trigger/ledtrig-panic.c +++ b/drivers/leds/trigger/ledtrig-panic.c @@ -67,10 +67,13 @@ 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; }