int reset_control_deassert()

in core.c [529:565]

• 24 lines of code
• 9 McCabe index (conditional complexity)

int reset_control_deassert(struct reset_control *rstc)
{
	if (!rstc)
		return 0;

	if (WARN_ON(IS_ERR(rstc)))
		return -EINVAL;

	if (reset_control_is_array(rstc))
		return reset_control_array_deassert(rstc_to_array(rstc));

	if (rstc->shared) {
		if (WARN_ON(atomic_read(&rstc->triggered_count) != 0))
			return -EINVAL;

		if (atomic_inc_return(&rstc->deassert_count) != 1)
			return 0;
	} else {
		if (!rstc->acquired) {
			WARN(1, "reset %s (ID: %u) is not acquired\n",
			     rcdev_name(rstc->rcdev), rstc->id);
			return -EPERM;
		}
	}

	/*
	 * If the reset controller does not implement .deassert(), we assume
	 * that it handles self-deasserting reset lines via .reset(). In that
	 * case, the reset lines are deasserted by default. If that is not the
	 * case, the reset controller driver should implement .deassert() and
	 * return -ENOTSUPP.
	 */
	if (!rstc->rcdev->ops->deassert)
		return 0;

	return rstc->rcdev->ops->deassert(rstc->rcdev, rstc->id);
}