SPI_TRANSFER_BUF_LEN
priv->spi_tx_buf = devm_kzalloc(&spi->dev, SPI_TRANSFER_BUF_LEN,
priv->spi_rx_buf = devm_kzalloc(&spi->dev, SPI_TRANSFER_BUF_LEN,
u8 buf[SPI_TRANSFER_BUF_LEN];
SPI_TRANSFER_BUF_LEN);
SPI_TRANSFER_BUF_LEN - 1);
mcp251x_spi_trans(spi, SPI_TRANSFER_BUF_LEN);
memcpy(buf, priv->spi_rx_buf, SPI_TRANSFER_BUF_LEN);
u8 buf[SPI_TRANSFER_BUF_LEN];
if (len > SPI_TRANSFER_BUF_LEN - 1 || len <= 0)
u8 spi_transfer_buf[SPI_TRANSFER_BUF_LEN];