Just because CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK is selected doesn't mean that all the interrupts are using the effective affinity mask. For a number of them, this mask is likely to be empty.
In order to deal with this, let's restrict the use of the effective affinity mask to these interrupts that have been configured as "single target". Signed-off-by: Marc Zyngier <[email protected]> --- include/linux/irq.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/irq.h b/include/linux/irq.h index d2d543794093..af1510642b8a 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -781,7 +781,10 @@ static inline struct cpumask *irq_data_get_affinity_mask(struct irq_data *d) static inline struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d) { - return d->common->effective_affinity; + if (irqd_is_single_target(d)) + return d->common->effective_affinity; + else + return d->common->affinity; } static inline void irq_data_update_effective_affinity(struct irq_data *d, const struct cpumask *m) -- 2.11.0
