Driver Core: raw: add nodename for raw devices

This adds support to the raw driver to report the proper device name to
userspace for the raw devices.
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>

drivers/char/raw.c

@@ -261,6 +261,11 @@ static const struct file_operations raw_ctl_fops = {
 
 static struct cdev raw_cdev;
 
+static char *raw_nodename(struct device *dev)
+{
+	return kasprintf(GFP_KERNEL, "raw/%s", dev_name(dev));
+}
+
 static int __init raw_init(void)
 {
 	dev_t dev = MKDEV(RAW_MAJOR, 0);
@@ -284,6 +289,7 @@ static int __init raw_init(void)
 		ret = PTR_ERR(raw_class);
 		goto error_region;
 	}
+	raw_class->nodename = raw_nodename;
 	device_create(raw_class, NULL, MKDEV(RAW_MAJOR, 0), NULL, "rawctl");
 
 	return 0;