static int dst_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone){	struct dst_state* state = fe->demodulator_priv;	state->tone = tone;	if (state->dst_type != DST_TYPE_IS_SAT)		return 0;	switch (tone) {		case SEC_TONE_OFF:			if (state->type_flags & DST_TYPE_HAS_OBS_REGS)			    state->tx_tuna[2] = 0x00;			else			    state->tx_tuna[2] = 0xff;			break;		case SEC_TONE_ON:			state->tx_tuna[2] = 0x02;			break;		default:			return -EINVAL;	}	dst_tone_power_cmd(state);	return 0;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/a427de6f72bc0d83ebb1d87f9003c5e1009f21cd/dst.c/buggy/drivers/media/dvb/bt8xx/dst.c