HI3110_RX_BUF_LEN
hi3110_spi_trans(spi, HI3110_RX_BUF_LEN);
memcpy(buf, priv->spi_rx_buf + 1, HI3110_RX_BUF_LEN - 1);
u8 buf[HI3110_RX_BUF_LEN - 1];
priv->spi_tx_buf = devm_kzalloc(&spi->dev, HI3110_RX_BUF_LEN,
priv->spi_rx_buf = devm_kzalloc(&spi->dev, HI3110_RX_BUF_LEN,