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

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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: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-02-02 17:35:13 +09:00
parent b4f74767a0
commit e9867c5699
1 changed files with 16 additions and 12 deletions
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28
drivers/sh/intc.c
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@ -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;
@ -881,24 +881,28 @@ 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;
desc = irq_to_desc_alloc_node(new, node);
if (unlikely(!desc)) {
pr_info("can't get irq_desc for %d\n", new);
goto out_unlock;
}
desc = move_irq_desc(desc, node);
__set_bit(new, intc_irq_map);
irq = new;
}
desc = irq_to_desc_alloc_node(new, node);
if (unlikely(!desc)) {
pr_info("can't get irq_desc for %d\n", new);
goto out_unlock;
}
desc = move_irq_desc(desc, node);
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;