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Subject[PATCH] leds: trigger: gpio: Avoid warning on update of inverted
Date
From: Jan Kiszka <jan.kiszka@siemens.com>

If the GPIO has not been configured yet, writing to inverted will raise
a kernel warning.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
drivers/leds/trigger/ledtrig-gpio.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/leds/trigger/ledtrig-gpio.c b/drivers/leds/trigger/ledtrig-gpio.c
index dc64679b1a92..0120faa3dafa 100644
--- 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;
}
--
2.26.2
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