Merge "irqdomain: Implement and expose API to clear IRQ mapping for radix tree"

#include <linux/of.h>

#include <linux/mutex.h>

#include <linux/radix-tree.h>

#include <linux/slab.h>

#include <linux/irq.h>

struct device_node;

struct irq_domain;

extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec);

extern void irq_dispose_mapping(unsigned int virq);

/**

* irq_dispose_all_tree_mappings() - Unmaps all interrupts from a domain

* @domain: domain owning the interrupt range

*

* This routine helps unmap all the interrupts that were mapped to the

* domain using a radix tree.

*/

static inline void irq_dispose_all_tree_mappings(

					struct irq_domain *domain)

{

	struct irq_data **irq_data;

	unsigned int num_irqs = 0;

	unsigned int max_irqs = domain->mapcount;

	unsigned int index = 0;

	if (!max_irqs)

		return;

	irq_data = kcalloc(max_irqs, sizeof(*irq_data), GFP_KERNEL);

	if (!irq_data)

		return;

	rcu_read_lock();

	num_irqs = radix_tree_gang_lookup(&domain->revmap_tree,

					(void **)irq_data, 0, max_irqs);

	rcu_read_unlock();

	for (index = 0; index < num_irqs; index++)

		irq_dispose_mapping(irq_data[index]->irq);

	kfree(irq_data);

}

/**

 * irq_linear_revmap() - Find a linux irq from a hw irq number.

 * @domain: domain owning this hardware interrupt