gb_spi_transfer
struct gb_spi_transfer *gb_xfer;
headers_size = (count + 1) * sizeof(struct gb_spi_transfer);
headers_size = (count + 1) * sizeof(struct gb_spi_transfer);
return data_max - (tx_size + sizeof(struct gb_spi_transfer));
struct gb_spi_transfer transfers[]; /* count of these */