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authorPaul Mundt <lethal@linux-sh.org>2010-02-02 17:35:13 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-02-02 17:35:13 +0900
commite9867c569970d8afb4b882bafbbe81426bd46333 (patch)
tree9d3f1cafaa9bbb7cf1f989fc9726704463c51646 /drivers/sh
parentb4f74767a04e175c028336e06507fcc05f5a8618 (diff)
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>
Diffstat (limited to 'drivers/sh')
-rw-r--r--drivers/sh/intc.c28
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;