The FIP VLAN frame consists of an ethernet header followed by the FIP VLAN frame, so we need to skip the ethernet header if we want to check the FIP opcode. Signed-off-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>