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: [PATCH] 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>
---
drivers/misc/gpio_led.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/gpio_led.c b/drivers/misc/gpio_led.c
index 3fedddc8b5a..de2041956b8 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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