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leds: triggers: Return from led_trigger_set() if there is nothing to do

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If led_trigger_set() is called with "trig" argument set to NULL, and there
is no trigger to remove then the function should return immediately so
as to avoid doing unnecessary allocation and sending uevent.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Reported-by: Daniel Romell <daro@hms.se>
Acked-by Daniel Romell <daro@hms.se>
This commit is contained in:
Jacek Anaszewski 2016-09-18 20:24:29 +02:00 committed by Jacek Anaszewski
parent 74b69e5246
commit fbfa197afd
1 changed files with 3 additions and 0 deletions
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3
drivers/leds/led-triggers.c
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@ -110,6 +110,9 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trig)
char *envp[2];
const char *name;
if (!led_cdev->trigger && !trig)
return;
name = trig ? trig->name : "none";
event = kasprintf(GFP_KERNEL, "TRIGGER=%s", name);