[patch] Fix error handling in sysfs registration

[Matthew Dobson <colpatch@us.ibm.com>]

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The cpu, memblk, and node driver/device registration should be a little 
more clean in the way it handles registration failures.  Or at least 
*consistent* amongst the topology elements.  Right now, failures are 
either silent, obscure, or leave things in an inconsistent state.

Cheers!

-Matt

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diff -Nur --exclude-from=/usr/src/.dontdiff linux-2.5.64-vanilla/drivers/base/cpu.c linux-2.5.64-sysfs_cleanup/drivers/base/cpu.c
--- linux-2.5.64-vanilla/drivers/base/cpu.c	Tue Mar  4 19:29:15 2003
+++ linux-2.5.64-sysfs_cleanup/drivers/base/cpu.c	Mon Mar 17 14:08:59 2003
@@ -48,6 +48,9 @@
 
 int __init cpu_dev_init(void)
 {
-	devclass_register(&cpu_devclass);
-	return driver_register(&cpu_driver);
+	int error;
+	if (!(error = devclass_register(&cpu_devclass)))
+		if (error = driver_register(&cpu_driver))
+			devclass_unregister(&cpu_devclass);
+	return error;
 }
diff -Nur --exclude-from=/usr/src/.dontdiff linux-2.5.64-vanilla/drivers/base/memblk.c linux-2.5.64-sysfs_cleanup/drivers/base/memblk.c
--- linux-2.5.64-vanilla/drivers/base/memblk.c	Tue Mar  4 19:29:54 2003
+++ linux-2.5.64-sysfs_cleanup/drivers/base/memblk.c	Mon Mar 17 14:09:42 2003
@@ -47,9 +47,12 @@
 }
 
 
-static int __init register_memblk_type(void)
+int __init register_memblk_type(void)
 {
-	int error = devclass_register(&memblk_devclass);
-	return error ? error : driver_register(&memblk_driver);
+	int error;
+	if (!(error = devclass_register(&memblk_devclass)))
+		if (error = driver_register(&memblk_driver))
+			devclass_unregister(&memblk_devclass);
+	return error;
 }
 postcore_initcall(register_memblk_type);
diff -Nur --exclude-from=/usr/src/.dontdiff linux-2.5.64-vanilla/drivers/base/node.c linux-2.5.64-sysfs_cleanup/drivers/base/node.c
--- linux-2.5.64-vanilla/drivers/base/node.c	Tue Mar  4 19:29:00 2003
+++ linux-2.5.64-sysfs_cleanup/drivers/base/node.c	Mon Mar 17 14:09:52 2003
@@ -89,9 +89,12 @@
 }
 
 
-static int __init register_node_type(void)
+int __init register_node_type(void)
 {
-	int error = devclass_register(&node_devclass);
-	return error ? error : driver_register(&node_driver);
+	int error;
+	if (!(error = devclass_register(&node_devclass)))
+		if (error = driver_register(&node_driver))
+			devclass_unregister(&node_devclass);
+	return error;
 }
 postcore_initcall(register_node_type);