On Fri, 9 Sep 2016, Alexandre TORGUE wrote: > +static void stm32_exti_free(struct irq_domain *d, unsigned int virq, > + unsigned int nr_irqs) > +{ > + struct irq_data *data = irq_get_irq_data(virq); > + > + irq_gc_mask_clr_bit(data->parent_data); I have a hard time to understand this. The irq domain is not hierarchical. > + irq_domain_reset_irq_data(data); > + domain = irq_domain_add_linear(node, nr_exti, > + &irq_exti_domain_ops, NULL); It's a simple linear domain. So how can data->parent_data be a valid irq_data pointer? Answer: It can't! But it doesn't blow up in your face simply because the alloc/free callbacks are never invoked for simple non hierarchical domains. So you should have removed that stuff after copying some other irqchip driver. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html