MBOX_MAX_BUF_SZ
mbox_info->mbox = kzalloc(MBOX_MAX_BUF_SZ, GFP_KERNEL);
mbox_info->buf_out = kzalloc(MBOX_MAX_BUF_SZ, GFP_KERNEL);
rcv_mbox_temp->mbox = kmemdup(recv_mbox->mbox, MBOX_MAX_BUF_SZ,
rcv_mbox_temp->buf_out = kzalloc(MBOX_MAX_BUF_SZ, GFP_KERNEL);
u16 out_size = MBOX_MAX_BUF_SZ;
size = mq->depth * MBOX_MAX_BUF_SZ;
dma_free_coherent(hwdev->dev, mq->depth * MBOX_MAX_BUF_SZ,
msg_ch->resp_msg.msg = kzalloc(MBOX_MAX_BUF_SZ, GFP_KERNEL);
msg_ch->recv_msg.msg = kzalloc(MBOX_MAX_BUF_SZ, GFP_KERNEL);
(MBOX_MAX_BUF_SZ - MBOX_SEQ_ID_MAX_VAL * MBOX_SEG_LEN)
offset = mq->prod_idx * MBOX_MAX_BUF_SZ;