/* used by HDLC layer to take control over HDLC device from hw driver*/
int (*attach)(struct net_device *dev,
unsigned short encoding, unsigned short parity);
/* used by HDLC layer to take control over HDLC device from hw driver*/
int (*attach)(struct net_device *dev,
unsigned short encoding, unsigned short parity);
/* May be used by hardware driver to gain control over HDLC device */
void detach_hdlc_protocol(struct net_device *dev);
/* May be used by hardware driver to gain control over HDLC device */
void detach_hdlc_protocol(struct net_device *dev);