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irqdomain: Make ops->map hook optional 

There isn't a really compelling reason to force ->map to be populated,
so allow it to be left unset.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Rob Herring <rob.herring@calxeda.com>
This commit is contained in:
Grant Likely 2012-06-03 22:04:39 -07:00
parent 7325570471
commit aed98048bd
1 changed files with 4 additions and 10 deletions
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14
kernel/irq/irqdomain.c
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@ -205,7 +205,8 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
* one can then use irq_create_mapping() to
* explicitly change them
*/
ops->map(domain, irq, hwirq);
if (ops->map)
ops->map(domain, irq, hwirq);
/* Clear norequest flags */
irq_clear_status_flags(irq, IRQ_NOREQUEST);
@ -340,8 +341,8 @@ static int irq_setup_virq(struct irq_domain *domain, unsigned int virq,
irq_data->hwirq = hwirq;
irq_data->domain = domain;
if (domain->ops->map(domain, virq, hwirq)) {
pr_debug("irq-%i==>hwirq-0x%lx mapping failed\n", virq, hwirq);
if (domain->ops->map && domain->ops->map(domain, virq, hwirq)) {
pr_err("irq-%i==>hwirq-0x%lx mapping failed\n", virq, hwirq);
irq_data->domain = NULL;
irq_data->hwirq = 0;
return -1;
@ -763,12 +764,6 @@ static int __init irq_debugfs_init(void)
__initcall(irq_debugfs_init);
#endif /* CONFIG_IRQ_DOMAIN_DEBUG */
static int irq_domain_simple_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hwirq)
{
return 0;
}
/**
* irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
*
@ -831,7 +826,6 @@ int irq_domain_xlate_onetwocell(struct irq_domain *d,
EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
const struct irq_domain_ops irq_domain_simple_ops = {
.map = irq_domain_simple_map,
.xlate = irq_domain_xlate_onetwocell,
};
EXPORT_SYMBOL_GPL(irq_domain_simple_ops);