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Commit cf2be8ba authored by Marc Zyngier's avatar Marc Zyngier
Browse files

irqchip/gic-v3-its: Rework LPI freeing 



Rework LPI deallocation so that it can be reused by the v4 support
code.

Reviewed-by: default avatarEric Auger <eric.auger@redhat.com>
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 7c297a2d

drivers/irqchip/irq-gic-v3-its.c

+7 −6
Original line number Diff line number Diff line
@@ -881,16 +881,15 @@ static unsigned long *its_lpi_alloc_chunks(int nr_irqs, int *base, int *nr_ids) 
	return bitmap;

}



static void its_lpi_free(struct event_lpi_map *map)

static void its_lpi_free_chunks(unsigned long *bitmap, int base, int nr_ids)

{

	int base = map->lpi_base;

	int nr_ids = map->nr_lpis;

	int lpi;



	spin_lock(&lpi_lock);



	for (lpi = base; lpi < (base + nr_ids); lpi += IRQS_PER_CHUNK) {

		int chunk = its_lpi_to_chunk(lpi);



		BUG_ON(chunk > lpi_chunks);

		if (test_bit(chunk, lpi_bitmap)) {

			clear_bit(chunk, lpi_bitmap);
@@ -901,8 +900,7 @@ static void its_lpi_free(struct event_lpi_map *map) 


	spin_unlock(&lpi_lock);



	kfree(map->lpi_map);

	kfree(map->col_map);

	kfree(bitmap);

}



static struct page *its_allocate_prop_table(gfp_t gfp_flags)
@@ -1674,7 +1672,10 @@ static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq, 
	/* If all interrupts have been freed, start mopping the floor */

	if (bitmap_empty(its_dev->event_map.lpi_map,

			 its_dev->event_map.nr_lpis)) {

		its_lpi_free(&its_dev->event_map);

		its_lpi_free_chunks(its_dev->event_map.lpi_map,

				    its_dev->event_map.lpi_base,

				    its_dev->event_map.nr_lpis);

		kfree(its_dev->event_map.col_map);



		/* Unmap device/itt */

		its_send_mapd(its_dev, 0);