[Linux-parport] [PATCH 2.6.6-rc1] Add class support to drivers/char/ppdev.c

[Hanna Linder]

Here is a patch to add class support to drivers/char/ppdev.c. I have verified
it compiles and works on my system. 

Please test or consider for inclusion.

Thanks

Hanna Linder
IBM Linux Technology Center
--------
diff -Nrup linux-2.6.6-rc1/drivers/char/ppdev.c linux-2.6.6-rc1p/drivers/char/ppdev.c
--- linux-2.6.6-rc1/drivers/char/ppdev.c	2004-04-14 18:36:01.000000000 -0700
+++ linux-2.6.6-rc1p/drivers/char/ppdev.c	2004-04-27 14:56:56.000000000 -0700
@@ -84,6 +84,8 @@ struct pp_struct {
 	long default_inactivity;
 };
 
+static struct class_simple *ppdev_class;
+
 /* pp_struct.flags bitfields */
 #define PP_CLAIMED    (1<<0)
 #define PP_EXCL       (1<<1)
@@ -752,29 +754,53 @@ static struct file_operations pp_fops = 
 
 static int __init ppdev_init (void)
 {
-	int i;
+	int i, err = 0;
 
 	if (register_chrdev (PP_MAJOR, CHRDEV, &pp_fops)) {
 		printk (KERN_WARNING CHRDEV ": unable to get major %d\n",
 			PP_MAJOR);
-		return -EIO;
+		err = -EIO;
+		goto out;
+	}
+	ppdev_class = class_simple_create(THIS_MODULE, CHRDEV);
+	if (IS_ERR(ppdev_class)) {
+		err = PTR_ERR(ppdev_class);
+		goto out_chrdev;
 	}
 	devfs_mk_dir("parports");
 	for (i = 0; i < PARPORT_MAX; i++) {
-		devfs_mk_cdev(MKDEV(PP_MAJOR, i),
+		class_simple_device_add(ppdev_class, MKDEV(PP_MAJOR, i), 
+				NULL, "parport%d", i);
+		err = devfs_mk_cdev(MKDEV(PP_MAJOR, i),
 				S_IFCHR | S_IRUGO | S_IWUGO, "parports/%d", i);
+		if (err) 
+			goto out_class;
 	}
 
 	printk (KERN_INFO PP_VERSION "\n");
-	return 0;
+	err = 0;
+	goto out;
+
+out_class:
+	for (i = 0; i < PARPORT_MAX; i++) 
+		class_simple_device_remove(MKDEV(PP_MAJOR, i));
+	class_simple_destroy(ppdev_class);
+out_chrdev:
+	unregister_chrdev(PP_MAJOR, CHRDEV);
+out:
+	return err;
+
 }
 
 static void __exit ppdev_cleanup (void)
 {
 	int i;
 	/* Clean up all parport stuff */
-	for (i = 0; i < PARPORT_MAX; i++)
+	for (i = 0; i < PARPORT_MAX; i++) {
+		class_simple_device_remove(MKDEV(PP_MAJOR, i));
 		devfs_remove("parports/%d", i);
+	}
+	class_simple_destroy(ppdev_class);
 	devfs_remove("parports");
 	unregister_chrdev (PP_MAJOR, CHRDEV);
 }