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| author | Paul Mundt <lethal@linux-sh.org> | 2010-02-02 17:35:13 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-02-02 17:35:13 +0900 |
| commit | e9867c569970d8afb4b882bafbbe81426bd46333 (patch) | |
| tree | 9d3f1cafaa9bbb7cf1f989fc9726704463c51646 | |
| parent | b4f74767a04e175c028336e06507fcc05f5a8618 (diff) | |
| download | linux-e9867c569970d8afb4b882bafbbe81426bd46333.tar.gz linux-e9867c569970d8afb4b882bafbbe81426bd46333.tar.bz2 linux-e9867c569970d8afb4b882bafbbe81426bd46333.zip | |
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: Paul Mundt <lethal@linux-sh.org>
| -rw-r--r-- | drivers/sh/intc.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c index d5d7f23c19a5..7d286aedaeeb 100644 --- a/drivers/sh/intc.c +++ b/drivers/sh/intc.c @@ -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; |