From 5d884b97c5143f0d4097cefefbf9f7f755fd54fa Mon Sep 17 00:00:00 2001
From: Thomas Viehweger <patchesThomas.Vie@web.de>
Date: Wed, 2 Mar 2011 23:00:20 +0100
Subject: staging: lirc: fix for "lirc_dev: lirc_register_driver: driver
 pointer must be not NULL!"

Unable to load the module lirc_parallel without the attached patch.

Signed-off-by: Thomas Viehweger <patchesThomas.Vie@web.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/staging/lirc/lirc_parallel.c | 72 ++++++++++++++++++++++++++++++++++--
 1 file changed, 68 insertions(+), 4 deletions(-)

(limited to 'drivers/staging')

diff --git a/drivers/staging/lirc/lirc_parallel.c b/drivers/staging/lirc/lirc_parallel.c
index 2f668a8a0c41..832522c290cb 100644
--- a/drivers/staging/lirc/lirc_parallel.c
+++ b/drivers/staging/lirc/lirc_parallel.c
@@ -42,6 +42,7 @@
 
 #include <linux/poll.h>
 #include <linux/parport.h>
+#include <linux/platform_device.h>
 
 #include <media/lirc.h>
 #include <media/lirc_dev.h>
@@ -580,6 +581,40 @@ static struct lirc_driver driver = {
        .owner		= THIS_MODULE,
 };
 
+static struct platform_device *lirc_parallel_dev;
+
+static int __devinit lirc_parallel_probe(struct platform_device *dev)
+{
+	return 0;
+}
+
+static int __devexit lirc_parallel_remove(struct platform_device *dev)
+{
+	return 0;
+}
+
+static int lirc_parallel_suspend(struct platform_device *dev,
+                                 pm_message_t state)
+{
+	return 0;
+}
+
+static int lirc_parallel_resume(struct platform_device *dev)
+{
+	return 0;
+}
+
+static struct platform_driver lirc_parallel_driver = {
+	.probe	= lirc_parallel_probe,
+	.remove	= __devexit_p(lirc_parallel_remove),
+	.suspend	= lirc_parallel_suspend,
+	.resume	= lirc_parallel_resume,
+	.driver	= {
+		.name	= LIRC_DRIVER_NAME,
+		.owner	= THIS_MODULE,
+	},
+};
+
 static int pf(void *handle);
 static void kf(void *handle);
 
@@ -608,11 +643,30 @@ static void kf(void *handle)
 
 static int __init lirc_parallel_init(void)
 {
+	int result;
+
+	result = platform_driver_register(&lirc_parallel_driver);
+	if (result) {
+		printk("platform_driver_register returned %d\n", result);
+		return result;
+	}
+
+	lirc_parallel_dev = platform_device_alloc(LIRC_DRIVER_NAME, 0);
+	if (!lirc_parallel_dev) {
+		result = -ENOMEM;
+		goto exit_driver_unregister;
+	}
+
+	result = platform_device_add(lirc_parallel_dev);
+	if (result)
+		goto exit_device_put;
+
 	pport = parport_find_base(io);
 	if (pport == NULL) {
 		printk(KERN_NOTICE "%s: no port at %x found\n",
 		       LIRC_DRIVER_NAME, io);
-		return -ENXIO;
+		result = -ENXIO;
+		goto exit_device_put;
 	}
 	ppdevice = parport_register_device(pport, LIRC_DRIVER_NAME,
 					   pf, kf, irq_handler, 0, NULL);
@@ -620,7 +674,8 @@ static int __init lirc_parallel_init(void)
 	if (ppdevice == NULL) {
 		printk(KERN_NOTICE "%s: parport_register_device() failed\n",
 		       LIRC_DRIVER_NAME);
-		return -ENXIO;
+		result = -ENXIO;
+		goto exit_device_put;
 	}
 	if (parport_claim(ppdevice) != 0)
 		goto skip_init;
@@ -638,7 +693,8 @@ static int __init lirc_parallel_init(void)
 		is_claimed = 0;
 		parport_release(pport);
 		parport_unregister_device(ppdevice);
-		return -EIO;
+		result = -EIO;
+		goto exit_device_put;
 	}
 
 #endif
@@ -649,16 +705,24 @@ static int __init lirc_parallel_init(void)
 	is_claimed = 0;
 	parport_release(ppdevice);
  skip_init:
+	driver.dev = &lirc_parallel_dev->dev;
 	driver.minor = lirc_register_driver(&driver);
 	if (driver.minor < 0) {
 		printk(KERN_NOTICE "%s: register_chrdev() failed\n",
 		       LIRC_DRIVER_NAME);
 		parport_unregister_device(ppdevice);
-		return -EIO;
+		result = -EIO;
+		goto exit_device_put;
 	}
 	printk(KERN_INFO "%s: installed using port 0x%04x irq %d\n",
 	       LIRC_DRIVER_NAME, io, irq);
 	return 0;
+
+exit_device_put:
+	platform_device_put(lirc_parallel_dev);
+exit_driver_unregister:
+	platform_driver_unregister(&lirc_parallel_driver);
+	return result;
 }
 
 static void __exit lirc_parallel_exit(void)
-- 
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