static void __init intc_subgroup_init_one()

in intc/virq.c [145:188]

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

static void __init intc_subgroup_init_one(struct intc_desc *desc,
					  struct intc_desc_int *d,
					  struct intc_subgroup *subgroup)
{
	struct intc_map_entry *mapped;
	unsigned int pirq;
	unsigned long flags;
	int i;

	mapped = radix_tree_lookup(&d->tree, subgroup->parent_id);
	if (!mapped) {
		WARN_ON(1);
		return;
	}

	pirq = mapped - intc_irq_xlate;

	raw_spin_lock_irqsave(&d->lock, flags);

	for (i = 0; i < ARRAY_SIZE(subgroup->enum_ids); i++) {
		struct intc_subgroup_entry *entry;
		int err;

		if (!subgroup->enum_ids[i])
			continue;

		entry = kmalloc(sizeof(*entry), GFP_NOWAIT);
		if (!entry)
			break;

		entry->pirq = pirq;
		entry->enum_id = subgroup->enum_ids[i];
		entry->handle = intc_subgroup_data(subgroup, d, i);

		err = radix_tree_insert(&d->tree, entry->enum_id, entry);
		if (unlikely(err < 0))
			break;

		radix_tree_tag_set(&d->tree, entry->enum_id,
				   INTC_TAG_VIRQ_NEEDS_ALLOC);
	}

	raw_spin_unlock_irqrestore(&d->lock, flags);
}