SCSI_REMOVAL_PREVENT
scmd->cmnd[4] = SCSI_REMOVAL_PREVENT;
sdev->locked = (state == SCSI_REMOVAL_PREVENT);
return scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
do_lock ? SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);