linux-kernel - [PATCH v4] leds: pwm: check result of led_pwm_set() in led_pwm

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Date:   Mon, 23 Mar 2020 06:24:47 +0000
From:   Denis Osterland-Heim <denis.osterland@...hl.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v4] leds: pwm: check result of led_pwm_set() in led_pwm_add()

led_pwm_set() now returns an error when setting the PWM fails.

Cc: Uwe Kleine-König <uwe@...ine-koenig.org>
Signed-off-by: Denis Osterland-Heim <Denis.Osterland@...hl.com>
---
 drivers/leds/leds-pwm.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 6caf8bea8cd5..07eab2d8b7c7 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -91,15 +91,21 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
 	pwm_init_state(led_data->pwm, &led_data->pwmstate);
 
 	ret = devm_led_classdev_register(dev, &led_data->cdev);
-	if (ret == 0) {
-		priv->num_leds++;
-		led_pwm_set(&led_data->cdev, led_data->cdev.brightness);
-	} else {
+	if (ret) {
 		dev_err(dev, "failed to register PWM led for %s: %d\n",
 			led->name, ret);
+		return ret;
 	}
 
-	return ret;
+	ret = led_pwm_set(&led_data->cdev, led_data->cdev.brightness);
+	if (ret) {
+		dev_err(dev, "failed to set led PWM value for %s: %d",
+			led->name, ret);
+		return ret;
+	}
+
+	priv->num_leds++;
+	return 0;
 }
 
 static int led_pwm_create_fwnode(struct device *dev, struct led_pwm_priv *priv)
-- 
2.25.2



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