- irq_desc[irq].affinity = cpumask_of_cpu(cpu);
- irq_desc[irq].chip->set_affinity(irq, cpumask_of_cpu(cpu));
+ struct irq_desc *desc = irq_desc + irq;
+ cpumask_t mask = cpumask_of_cpu(cpu);
+
+ spin_lock_irq(&desc->lock);
+ desc->affinity = mask;
+ desc->chip->set_affinity(irq, mask);
+ spin_unlock_irq(&desc->lock);