RESP_LEN
if (resp[RESP_LEN] != GET_RESP_LEN) {
dev_err(dev, "Unexpected get brightness response length: %d\n", resp[RESP_LEN]);
case RESP_LEN: /* Length byte */
dell_bl->resp_len = dell_bl->resp[RESP_LEN];
dev_dbg(dev, "Firmware version: %.*s\n", resp[RESP_LEN] - 3, resp + RESP_DATA);
PRINT_MIS_word(asd_ha, RESP_LEN);
PRINT_LMIP_word(asd_ha, lseq, RESP_LEN);