static void ipoctal_irq_rx()

in devices/ipoctal.c [158:201]

• 34 lines of code
• 7 McCabe index (conditional complexity)

static void ipoctal_irq_rx(struct ipoctal_channel *channel, u8 sr)
{
	struct tty_port *port = &channel->tty_port;
	unsigned char value;
	unsigned char flag;
	u8 isr;

	do {
		value = ioread8(&channel->regs->r.rhr);
		flag = TTY_NORMAL;
		/* Error: count statistics */
		if (sr & SR_ERROR) {
			iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);

			if (sr & SR_OVERRUN_ERROR) {
				channel->stats.overrun_err++;
				/* Overrun doesn't affect the current character*/
				tty_insert_flip_char(port, 0, TTY_OVERRUN);
			}
			if (sr & SR_PARITY_ERROR) {
				channel->stats.parity_err++;
				flag = TTY_PARITY;
			}
			if (sr & SR_FRAMING_ERROR) {
				channel->stats.framing_err++;
				flag = TTY_FRAME;
			}
			if (sr & SR_RECEIVED_BREAK) {
				channel->stats.rcv_break++;
				flag = TTY_BREAK;
			}
		}
		tty_insert_flip_char(port, value, flag);

		/* Check if there are more characters in RX FIFO
		 * If there are more, the isr register for this channel
		 * has enabled the RxRDY|FFULL bit.
		 */
		isr = ioread8(&channel->block_regs->r.isr);
		sr = ioread8(&channel->regs->r.sr);
	} while (isr & channel->isr_rx_rdy_mask);

	tty_flip_buffer_push(port);
}