Driver Core: misc: add nodename support for misc devices.

This adds support for misc devices to report their requested nodename to
userspace.  It also updates a number of misc drivers to provide the
needed subdirectory and device name to be used for them.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index a5e0db9..62c99fa 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -168,7 +168,6 @@
 	.open		= misc_open,
 };
 
-
 /**
  *	misc_register	-	register a miscellaneous device
  *	@misc: device structure
@@ -217,8 +216,8 @@
 		misc_minors[misc->minor >> 3] |= 1 << (misc->minor & 7);
 	dev = MKDEV(MISC_MAJOR, misc->minor);
 
-	misc->this_device = device_create(misc_class, misc->parent, dev, NULL,
-					  "%s", misc->name);
+	misc->this_device = device_create(misc_class, misc->parent, dev,
+					  misc, "%s", misc->name);
 	if (IS_ERR(misc->this_device)) {
 		err = PTR_ERR(misc->this_device);
 		goto out;
@@ -264,6 +263,15 @@
 EXPORT_SYMBOL(misc_register);
 EXPORT_SYMBOL(misc_deregister);
 
+static char *misc_nodename(struct device *dev)
+{
+	struct miscdevice *c = dev_get_drvdata(dev);
+
+	if (c->devnode)
+		return kstrdup(c->devnode, GFP_KERNEL);
+	return NULL;
+}
+
 static int __init misc_init(void)
 {
 	int err;
@@ -279,6 +287,7 @@
 	err = -EIO;
 	if (register_chrdev(MISC_MAJOR,"misc",&misc_fops))
 		goto fail_printk;
+	misc_class->nodename = misc_nodename;
 	return 0;
 
 fail_printk: