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-rw-r--r--kernel/irq/irqdomain.c37
1 files changed, 32 insertions, 5 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 8798b6c9e945..f3ff1eb8dd09 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -588,15 +588,42 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
if (irq_domain_translate(domain, fwspec, &hwirq, &type))
return 0;
- if (irq_domain_is_hierarchy(domain)) {
+ /*
+ * WARN if the irqchip returns a type with bits
+ * outside the sense mask set and clear these bits.
+ */
+ if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK))
+ type &= IRQ_TYPE_SENSE_MASK;
+
+ /*
+ * 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) {
/*
- * If we've already configured this interrupt,
- * don't do it again, or hell will break loose.
+ * If the trigger type is not specified or matches the
+ * current trigger type then we are done so return the
+ * interrupt number.
*/
- virq = irq_find_mapping(domain, hwirq);
- if (virq)
+ if (type == IRQ_TYPE_NONE || type == irq_get_trigger_type(virq))
return virq;
+ /*
+ * If the trigger type has not been set yet, then set
+ * it now and return the interrupt number.
+ */
+ if (irq_get_trigger_type(virq) == IRQ_TYPE_NONE) {
+ irq_set_irq_type(virq, type);
+ return virq;
+ }
+
+ pr_warn("type mismatch, failed to map hwirq-%lu for %s!\n",
+ hwirq, of_node_full_name(to_of_node(fwspec->fwnode)));
+ return 0;
+ }
+
+ if (irq_domain_is_hierarchy(domain)) {
virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec);
if (virq <= 0)
return 0;