@@ -478,11 +478,6 @@ unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
return 0;
}
- if (irq_domain_is_hierarchy(domain)) {
- virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, irq_data);
- return virq <= 0 ? 0 : virq;
- }
-
/* If domain has no translation, then we assume interrupt line */
if (domain->ops->xlate == NULL)
hwirq = irq_data->args[0];
@@ -492,10 +487,24 @@ unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
return 0;
}
- /* Create mapping */
- virq = irq_create_mapping(domain, hwirq);
- if (!virq)
- return virq;
+ if (irq_domain_is_hierarchy(domain)) {
+ /*
+ * If we've already configured this interrupt,
+ * don't do it again, or hell will break loose.
+ */
+ virq = irq_find_mapping(domain, hwirq);
+ if (virq)
+ return virq;
+
+ virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, irq_data);
+ if (virq <= 0)
+ return 0;
+ } else {
+ /* Create mapping */
+ virq = irq_create_mapping(domain, hwirq);
+ if (!virq)
+ return virq;
+ }
/* Set type if specified and different than the current one */
if (type != IRQ_TYPE_NONE &&
It is possible to call irq_create_of_mapping to create/translate the same IRQ from DT for multiple times. Perform irq_find_mapping check and set_type for hierarchy irqdomain in irq_create_of_mapping() to avoid duplicate these functionality in all outer most irqdomain. Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com> --- kernel/irq/irqdomain.c | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-)