genirq: Always apply cpu online mask

If the affinity had been set by the user, then a later request_irq()
will honour that setting. But online cpus can have changed. So apply
the online mask and for this case as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/irq/manage.c

@@ -256,6 +256,8 @@ EXPORT_SYMBOL_GPL(irq_set_affinity_notifier);
  */
 static int setup_affinity(unsigned int irq, struct irq_desc *desc)
 {
+	struct cpumask *set = irq_default_affinity;
+
 	/* Excludes PER_CPU and NO_BALANCE interrupts */
 	if (!irq_can_set_affinity(irq))
 		return 0;
@@ -265,15 +267,13 @@ static int setup_affinity(unsigned int irq, struct irq_desc *desc)
 	 * one of the targets is online.
 	 */
 	if (desc->status & (IRQ_AFFINITY_SET)) {
-		if (cpumask_any_and(desc->irq_data.affinity, cpu_online_mask)
-		    < nr_cpu_ids)
-			goto set_affinity;
+		if (cpumask_intersects(desc->irq_data.affinity,
+				       cpu_online_mask))
+			set = desc->irq_data.affinity;
 		else
 			desc->status &= ~IRQ_AFFINITY_SET;
 	}
-
-	cpumask_and(desc->irq_data.affinity, cpu_online_mask, irq_default_affinity);
-set_affinity:
+	cpumask_and(desc->irq_data.affinity, cpu_online_mask, set);
 	desc->irq_data.chip->irq_set_affinity(&desc->irq_data, desc->irq_data.affinity, false);
 
 	return 0;