ATH6KL_FWLOG_PAYLOAD_SIZE
if (WARN_ON(len > ATH6KL_FWLOG_PAYLOAD_SIZE))
slot_len = sizeof(*slot) + ATH6KL_FWLOG_PAYLOAD_SIZE;
memset(slot->payload + len, 0, ATH6KL_FWLOG_PAYLOAD_SIZE - len);
buf = kmalloc(ATH6KL_FWLOG_PAYLOAD_SIZE, GFP_KERNEL);