pktcdvd: remove broken dev_t export of class devices

The pktcdvd created class devices only export some sysfs files,
but have no char dev_t registered in the driver.

At class device creation time they copy the dev_t value of the
block device to the char device, wich will register a new char
device in the driver core and userspace, with a conflicting dev_t
value.

In many cases the class devices dev_t just points to a random
USB device. This fixes the sysfs "duplicate entry" errors.
Signed-off-by: NKay Sievers <kay.sievers@vrfy.org>
Acked-by: NPeter Osterlund <petero2@telia.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/block/pktcdvd.c

@@ -302,7 +302,7 @@ static struct kobj_type kobj_pkt_type_wqueue = {
 static void pkt_sysfs_dev_new(struct pktcdvd_device *pd)
 {
 	if (class_pktcdvd) {
-		pd->dev = device_create(class_pktcdvd, NULL, pd->pkt_dev, NULL,
+		pd->dev = device_create(class_pktcdvd, NULL, MKDEV(0, 0), NULL,
 					"%s", pd->name);
 		if (IS_ERR(pd->dev))
 			pd->dev = NULL;