[PATCH] leds: lm3532: propagate enable GPIO errors

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

devm_gpiod_get_optional() returns NULL when the optional GPIO is not
present, but may return -EPROBE_DEFER or other errors.

lm3532_parse_node() currently treats GPIO lookup errors as if the GPIO
were not present.

Check the return value and propagate errors from the enable GPIO lookup.

Fixes: bc1b8492c764 ("leds: lm3532: Introduce the lm3532 LED driver")
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 drivers/leds/leds-lm3532.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c
index b51496910b08..a3bc9680dc4c 100644
--- a/drivers/leds/leds-lm3532.c
+++ b/drivers/leds/leds-lm3532.c
@@ -560,7 +560,8 @@ static int lm3532_parse_node(struct lm3532_data *priv)
 	priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev,
 						   "enable", GPIOD_OUT_LOW);
 	if (IS_ERR(priv->enable_gpio))
-		priv->enable_gpio = NULL;
+		return dev_err_probe(&priv->client->dev, PTR_ERR(priv->enable_gpio),
+				     "failed to get enable GPIO\n");
 
 	if (priv->enable_gpio) {
 		ret = devm_add_action(&priv->client->dev, gpio_set_low_action, priv);
-- 
2.43.0