From 6516f81b64c71ab2be61f304d0e13dd84f730484 Mon Sep 17 00:00:00 2001
From: Igor Grinberg <grinberg@compulab.co.il>
Date: Fri, 8 Nov 2013 01:03:51 +0200
Subject: gpio_led: check gpio_request() return value

Add a check for the gpio_request() function return value and do not try
to configure the GPIO if the gpio_request() call fails.
Also, print an error message indicating the gpio_request() has failed.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Tested-by: Ilya Ledvich <ilya@compulab.co.il>

diff --git a/drivers/misc/gpio_led.c b/drivers/misc/gpio_led.c
index 3fedddc..de20419 100644
--- a/drivers/misc/gpio_led.c
+++ b/drivers/misc/gpio_led.c
@@ -11,7 +11,11 @@
 
 void __led_init(led_id_t mask, int state)
 {
-	gpio_request(mask, "gpio_led");
+	if (gpio_request(mask, "gpio_led") != 0) {
+		printf("%s: failed requesting GPIO%lu!\n", __func__, mask);
+		return;
+	}
+
 	gpio_direction_output(mask, state == STATUS_LED_ON);
 }
 
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