net: ipvtap: fix template string argument of device_create() call

The last argument of device_create() call should be a template string.
The tap_name variable should be the argument to the string, but not the
argument of the call itself.  We should add the template string and turn
tap_name into its argument.
Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipvlan/ipvtap.c

@@ -162,7 +162,7 @@ static int ipvtap_device_event(struct notifier_block *unused,
 
 		devt = MKDEV(MAJOR(ipvtap_major), vlantap->tap.minor);
 		classdev = device_create(&ipvtap_class, &dev->dev, devt,
-					 dev, tap_name);
+					 dev, "%s", tap_name);
 		if (IS_ERR(classdev)) {
 			tap_free_minor(ipvtap_major, &vlantap->tap);
 			return notifier_from_errno(PTR_ERR(classdev));