IFX_SPI_FIFO_SIZE 517 drivers/tty/serial/ifx6x60.c return IFX_SPI_FIFO_SIZE - kfifo_len(&ifx_dev->tx_fifo); IFX_SPI_FIFO_SIZE 824 drivers/tty/serial/ifx6x60.c if (kfifo_alloc(&ifx_dev->tx_fifo, IFX_SPI_FIFO_SIZE, GFP_KERNEL)) {