WMI_MGMT_SEND_DOWNLD_LEN
buf_len = frame->len < WMI_MGMT_SEND_DOWNLD_LEN ?
frame->len : WMI_MGMT_SEND_DOWNLD_LEN;
buf_len = min_t(int, frame->len, WMI_MGMT_SEND_DOWNLD_LEN);