can: remove obsolete empty ioctl() handler

With commit c7cbdbf2 ("net: rework SIOCGSTAMP ioctl handling") the only
ioctl function in can_ioctl() has been removed.

As this SIOCGSTAMP ioctl command is now handled in net/socket.c we can entirely
remove the CAN specific ioctl functions.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

include/linux/can/core.h

@@ -57,6 +57,5 @@ extern void can_rx_unregister(struct net *net, struct net_device *dev,
 			      void *data);
 
 extern int can_send(struct sk_buff *skb, int loop);
-extern int can_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 
 #endif /* !_CAN_CORE_H */

net/can/af_can.c

@@ -87,15 +87,6 @@ static atomic_t skbcounter = ATOMIC_INIT(0);
  * af_can socket functions
  */
 
-int can_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
-	switch (cmd) {
-	default:
-		return -ENOIOCTLCMD;
-	}
-}
-EXPORT_SYMBOL(can_ioctl);
-
 static void can_sock_destruct(struct sock *sk)
 {
 	skb_queue_purge(&sk->sk_receive_queue);

net/can/bcm.c

@@ -1688,7 +1688,7 @@ static const struct proto_ops bcm_ops = {
 	.accept        = sock_no_accept,
 	.getname       = sock_no_getname,
 	.poll          = datagram_poll,
-	.ioctl         = can_ioctl,	/* use can_ioctl() from af_can.c */
+	.ioctl         = sock_no_ioctl,
 	.gettstamp     = sock_gettstamp,
 	.listen        = sock_no_listen,
 	.shutdown      = sock_no_shutdown,

net/can/raw.c

@@ -845,7 +845,7 @@ static const struct proto_ops raw_ops = {
 	.accept        = sock_no_accept,
 	.getname       = raw_getname,
 	.poll          = datagram_poll,
-	.ioctl         = can_ioctl,	/* use can_ioctl() from af_can.c */
+	.ioctl         = sock_no_ioctl,
 	.gettstamp     = sock_gettstamp,
 	.listen        = sock_no_listen,
 	.shutdown      = sock_no_shutdown,