leds: trigger: gpio: Avoid warning on update of inverted

If the GPIO has not been configured yet, writing to inverted will raise a kernel warning. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Pavel Machek <[email protected]>
tadfisher · Jul 12, 2020 · 5ad79c2 · 5ad79c2
1 parent 14d3e74
commit 5ad79c2
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/leds/trigger/ledtrig-gpio.c b/drivers/leds/trigger/ledtrig-gpio.c
@@ -99,7 +99,8 @@ static ssize_t gpio_trig_inverted_store(struct device *dev,
 	gpio_data->inverted = inverted;
 
 	/* After inverting, we need to update the LED. */
-	gpio_trig_irq(0, led);
+	if (gpio_is_valid(gpio_data->gpio))
+		gpio_trig_irq(0, led);
 
 	return n;
 }