openwrtv4/target/linux/brcm2708/patches-3.10/0103-lirc_rpi-Don-t-register-with-lirc_dev-if-we-can-t-cl.patch

From 72ce4c24efeac1b3260b3b10ec7cbc2701dcef5a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Du=C5=A1an=20Dragi=C4=87?= <dragic.dusan@gmail.com>
Date: Wed, 25 Sep 2013 18:44:05 +0200
Subject: [PATCH 103/174] lirc_rpi: Don't register with lirc_dev if we can't
 claim gpio pins

Currently the lirc_rpi module always registers a new lirc device.
In case the gpio pins can't be claimed it exits without unregistering.

Skip registering with lirc_dev if pins can't be claimed.
Also, don't free gpio pins that we haven't claimed.
---
 drivers/staging/media/lirc/lirc_rpi.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- a/drivers/staging/media/lirc/lirc_rpi.c
+++ b/drivers/staging/media/lirc/lirc_rpi.c
@@ -590,8 +590,6 @@ static int __init lirc_rpi_init(void)
 
 static void lirc_rpi_exit(void)
 {
-	gpio_free(gpio_out_pin);
-	gpio_free(gpio_in_pin);
 	platform_device_unregister(lirc_rpi_dev);
 	platform_driver_unregister(&lirc_rpi_driver);
 	lirc_buffer_free(&rbuf);
@@ -623,6 +621,10 @@ static int __init lirc_rpi_init_module(v
 		goto exit_rpi;
 	}
 
+	result = init_port();
+	if (result < 0)
+		goto exit_rpi;
+
 	driver.features = LIRC_CAN_SET_SEND_DUTY_CYCLE |
 			  LIRC_CAN_SET_SEND_CARRIER |
 			  LIRC_CAN_SEND_PULSE |
@@ -640,10 +642,6 @@ static int __init lirc_rpi_init_module(v
 
 	printk(KERN_INFO LIRC_DRIVER_NAME ": driver registered!\n");
 
-	result = init_port();
-	if (result < 0)
-		goto exit_rpi;
-
 	return 0;
 
 	exit_rpi:
@@ -654,6 +652,9 @@ static int __init lirc_rpi_init_module(v
 
 static void __exit lirc_rpi_exit_module(void)
 {
+	gpio_free(gpio_out_pin);
+	gpio_free(gpio_in_pin);
+
 	lirc_rpi_exit();
 
 	lirc_unregister_driver(driver.minor);