static int fsi_slave_handle_error()

in fsi-core.c [285:343]

• 43 lines of code
• 11 McCabe index (conditional complexity)

static int fsi_slave_handle_error(struct fsi_slave *slave, bool write,
				  uint32_t addr, size_t size)
{
	struct fsi_master *master = slave->master;
	int rc, link;
	uint32_t reg;
	uint8_t id, send_delay, echo_delay;

	if (discard_errors)
		return -1;

	link = slave->link;
	id = slave->id;

	dev_dbg(&slave->dev, "handling error on %s to 0x%08x[%zd]",
			write ? "write" : "read", addr, size);

	/* try a simple clear of error conditions, which may fail if we've lost
	 * communication with the slave
	 */
	rc = fsi_slave_report_and_clear_errors(slave);
	if (!rc)
		return 0;

	/* send a TERM and retry */
	if (master->term) {
		rc = master->term(master, link, id);
		if (!rc) {
			rc = fsi_master_read(master, link, id, 0,
					&reg, sizeof(reg));
			if (!rc)
				rc = fsi_slave_report_and_clear_errors(slave);
			if (!rc)
				return 0;
		}
	}

	send_delay = slave->t_send_delay;
	echo_delay = slave->t_echo_delay;

	/* getting serious, reset the slave via BREAK */
	rc = fsi_master_break(master, link);
	if (rc)
		return rc;

	slave->t_send_delay = send_delay;
	slave->t_echo_delay = echo_delay;

	rc = fsi_slave_set_smode(slave);
	if (rc)
		return rc;

	if (master->link_config)
		master->link_config(master, link,
				    slave->t_send_delay,
				    slave->t_echo_delay);

	return fsi_slave_report_and_clear_errors(slave);
}