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Commit e9867c56 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Provide create_irq_nr() for dynamic IRQ creation by number. 



This just reworks the existing create_irq_on_node() in to the new
create_irq_nr() which is generally exposed. This permits boards that
haven't converted over to sparseirq to try and use their existing ranges,
rather than having arbitrary vectors assigned to them.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent b4f74767

drivers/sh/intc.c

+16 −12
Original line number Diff line number Diff line
@@ -872,7 +872,7 @@ device_initcall(register_intc_sysdevs); 
/*

 * Dynamic IRQ allocation and deallocation

 */

static unsigned int create_irq_on_node(unsigned int irq_want, int node)

unsigned int create_irq_nr(unsigned int irq_want, int node)

{

	unsigned int irq = 0, new;

	unsigned long flags;
@@ -881,13 +881,19 @@ static unsigned int create_irq_on_node(unsigned int irq_want, int node) 
	spin_lock_irqsave(&vector_lock, flags);



	/*

	 * First try the wanted IRQ, then scan.

	 * First try the wanted IRQ

	 */

	if (test_and_set_bit(irq_want, intc_irq_map)) {

	if (test_and_set_bit(irq_want, intc_irq_map) == 0) {

		new = irq_want;

	} else {

		/* .. then fall back to scanning. */

		new = find_first_zero_bit(intc_irq_map, nr_irqs);

		if (unlikely(new == nr_irqs))

			goto out_unlock;



		__set_bit(new, intc_irq_map);

	}



	desc = irq_to_desc_alloc_node(new, node);

	if (unlikely(!desc)) {

		pr_info("can't get irq_desc for %d\n", new);
@@ -895,9 +901,7 @@ static unsigned int create_irq_on_node(unsigned int irq_want, int node) 
	}



	desc = move_irq_desc(desc, node);

		__set_bit(new, intc_irq_map);

	irq = new;

	}



out_unlock:

	spin_unlock_irqrestore(&vector_lock, flags);
@@ -913,7 +917,7 @@ int create_irq(void) 
	int nid = cpu_to_node(smp_processor_id());

	int irq;



	irq = create_irq_on_node(NR_IRQS_LEGACY, nid);

	irq = create_irq_nr(NR_IRQS_LEGACY, nid);

	if (irq == 0)

		irq = -1;