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of/irq: optimize device node matching loop in of_irq_init() 

Currently, of_irq_init() iterates over interrupt controller nodes
with for_each_matching_node(), and then gets each init function with
of_match_node() later.

This routine can be optimized with for_each_matching_node_and_match().
It allows to get the interrupt controller node and its init function
at the same time, saving __of_match_node() callings.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Masahiro Yamada 2015-11-24 22:10:26 +09:00 committed by Rob Herring
parent e9e5f63650
commit 264041e379
1 changed files with 13 additions and 14 deletions
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27
drivers/of/irq.c
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@ -472,6 +472,7 @@ EXPORT_SYMBOL_GPL(of_irq_to_resource_table);
struct of_intc_desc {
struct list_head list;
of_irq_init_cb_t irq_init_cb;
struct device_node *dev;
struct device_node *interrupt_parent;
};
@ -485,6 +486,7 @@ struct of_intc_desc {
*/
void __init of_irq_init(const struct of_device_id *matches)
{
const struct of_device_id *match;
struct device_node *np, *parent = NULL;
struct of_intc_desc *desc, *temp_desc;
struct list_head intc_desc_list, intc_parent_list;
@ -492,10 +494,15 @@ void __init of_irq_init(const struct of_device_id *matches)
INIT_LIST_HEAD(&intc_desc_list);
INIT_LIST_HEAD(&intc_parent_list);
for_each_matching_node(np, matches) {
for_each_matching_node_and_match(np, matches, &match) {
if (!of_find_property(np, "interrupt-controller", NULL) ||
!of_device_is_available(np))
continue;
if (WARN(!match->data, "of_irq_init: no init function for %s\n",
match->compatible))
continue;
/*
* Here, we allocate and populate an of_intc_desc with the node
* pointer, interrupt-parent device_node etc.
@ -506,6 +513,7 @@ void __init of_irq_init(const struct of_device_id *matches)
goto err;
}
desc->irq_init_cb = match->data;
desc->dev = of_node_get(np);
desc->interrupt_parent = of_irq_find_parent(np);
if (desc->interrupt_parent == np)
@ -525,27 +533,18 @@ void __init of_irq_init(const struct of_device_id *matches)
* The assumption is that NULL parent means a root controller.
*/
list_for_each_entry_safe(desc, temp_desc, &intc_desc_list, list) {
const struct of_device_id *match;
int ret;
of_irq_init_cb_t irq_init_cb;
if (desc->interrupt_parent != parent)
continue;
list_del(&desc->list);
match = of_match_node(matches, desc->dev);
if (WARN(!match->data,
"of_irq_init: no init function for %s\n",
match->compatible)) {
kfree(desc);
continue;
}
pr_debug("of_irq_init: init %s @ %p, parent %p\n",
match->compatible,
pr_debug("of_irq_init: init %s (%p), parent %p\n",
desc->dev->full_name,
desc->dev, desc->interrupt_parent);
irq_init_cb = (of_irq_init_cb_t)match->data;
ret = irq_init_cb(desc->dev, desc->interrupt_parent);
ret = desc->irq_init_cb(desc->dev,
desc->interrupt_parent);
if (ret) {
kfree(desc);
continue;