static int ipoctal_write_tty()

in devices/ipoctal.c [462:483]

• 14 lines of code
• 2 McCabe index (conditional complexity)

static int ipoctal_write_tty(struct tty_struct *tty,
			     const unsigned char *buf, int count)
{
	struct ipoctal_channel *channel = tty->driver_data;
	unsigned int char_copied;

	char_copied = ipoctal_copy_write_buffer(channel, buf, count);

	/* As the IP-OCTAL 485 only supports half duplex, do it manually */
	if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) {
		iowrite8(CR_DISABLE_RX, &channel->regs->w.cr);
		channel->rx_enable = 0;
		iowrite8(CR_CMD_ASSERT_RTSN, &channel->regs->w.cr);
	}

	/*
	 * Send a packet and then disable TX to avoid failure after several send
	 * operations
	 */
	iowrite8(CR_ENABLE_TX, &channel->regs->w.cr);
	return char_copied;
}