From 4e4210402639f16dfbfa5ba277aeb88fff401cec Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 30 Aug 2019 18:08:19 +0300
Subject: [PATCH] leds: trigger: gpio: GPIO 0 is valid
Git-commit: 4e4210402639f16dfbfa5ba277aeb88fff401cec
Patch-mainline: v5.4-rc1
References: git-fixes

Allow all valid GPIOs to be used in the driver.

Fixes: 17354bfe8527 ("leds: Add gpio-led trigger")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/leds/trigger/ledtrig-gpio.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/leds/trigger/ledtrig-gpio.c b/drivers/leds/trigger/ledtrig-gpio.c
index 33cc99a1a16a..dc64679b1a92 100644
--- a/drivers/leds/trigger/ledtrig-gpio.c
+++ b/drivers/leds/trigger/ledtrig-gpio.c
@@ -131,10 +131,10 @@ static ssize_t gpio_trig_gpio_store(struct device *dev,
 	if (gpio_data->gpio == gpio)
 		return n;
 
-	if (!gpio) {
-		if (gpio_data->gpio != 0)
+	if (!gpio_is_valid(gpio)) {
+		if (gpio_is_valid(gpio_data->gpio))
 			free_irq(gpio_to_irq(gpio_data->gpio), led);
-		gpio_data->gpio = 0;
+		gpio_data->gpio = gpio;
 		return n;
 	}
 
@@ -144,7 +144,7 @@ static ssize_t gpio_trig_gpio_store(struct device *dev,
 	if (ret) {
 		dev_err(dev, "request_irq failed with error %d\n", ret);
 	} else {
-		if (gpio_data->gpio != 0)
+		if (gpio_is_valid(gpio_data->gpio))
 			free_irq(gpio_to_irq(gpio_data->gpio), led);
 		gpio_data->gpio = gpio;
 		/* After changing the GPIO, we need to update the LED. */
@@ -172,6 +172,8 @@ static int gpio_trig_activate(struct led_classdev *led)
 		return -ENOMEM;
 
 	gpio_data->led = led;
+	gpio_data->gpio = -ENOENT;
+
 	led_set_trigger_data(led, gpio_data);
 
 	return 0;
@@ -181,7 +183,7 @@ static void gpio_trig_deactivate(struct led_classdev *led)
 {
 	struct gpio_trig_data *gpio_data = led_get_trigger_data(led);
 
-	if (gpio_data->gpio != 0)
+	if (gpio_is_valid(gpio_data->gpio))
 		free_irq(gpio_to_irq(gpio_data->gpio), led);
 	kfree(gpio_data);
 }
-- 
2.16.4