From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Fri, 26 May 2017 13:17:46 +0000 (+0200)
Subject: leds: trigger: gpio: Refresh LED state after GPIO change
X-Git-Tag: v4.13-rc1~140^2~3
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=71afe3cb1e8fdf89556047e03bcbcd731f1ab108;p=linux.git

leds: trigger: gpio: Refresh LED state after GPIO change

The new GPIO may have a different state than the old one.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
---

diff --git a/drivers/leds/trigger/ledtrig-gpio.c b/drivers/leds/trigger/ledtrig-gpio.c
index 51288a45fbcb..93d6b82e6437 100644
--- a/drivers/leds/trigger/ledtrig-gpio.c
+++ b/drivers/leds/trigger/ledtrig-gpio.c
@@ -170,6 +170,8 @@ static ssize_t gpio_trig_gpio_store(struct device *dev,
 		if (gpio_data->gpio != 0)
 			free_irq(gpio_to_irq(gpio_data->gpio), led);
 		gpio_data->gpio = gpio;
+		/* After changing the GPIO, we need to update the LED. */
+		schedule_work(&gpio_data->work);
 	}
 
 	return ret ? ret : n;