The startup vs. setaffinity ordering of interrupts depends on the
IRQF_NOAUTOEN flag. Chained interrupts are not getting any affinity
assignment at all.

A regular interrupt is started up and then the affinity is set. A
IRQF_NOAUTOEN marked interrupt is not started up, but the affinity is set
nevertheless.

Move the affinity setup to startup_irq() so the ordering is always the same
and chained interrupts get the proper default affinity assigned as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/irq/chip.c   |    2 ++
 kernel/irq/manage.c |   15 ++++++---------
 2 files changed, 8 insertions(+), 9 deletions(-)

--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -213,6 +213,8 @@ int irq_startup(struct irq_desc *desc, b
 			irq_enable(desc);
 		}
 		irq_state_set_started(desc);
+		/* Set default affinity mask once everything is setup */
+		irq_setup_affinity(desc);
 	}
 
 	if (resend)
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1325,6 +1325,12 @@ static int
 		if (new->flags & IRQF_ONESHOT)
 			desc->istate |= IRQS_ONESHOT;
 
+		/* Exclude IRQ from balancing if requested */
+		if (new->flags & IRQF_NOBALANCING) {
+			irq_settings_set_no_balancing(desc);
+			irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
+		}
+
 		if (irq_settings_can_autoenable(desc)) {
 			irq_startup(desc, true);
 		} else {
@@ -1339,15 +1345,6 @@ static int
 			desc->depth = 1;
 		}
 
-		/* Exclude IRQ from balancing if requested */
-		if (new->flags & IRQF_NOBALANCING) {
-			irq_settings_set_no_balancing(desc);
-			irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
-		}
-
-		/* Set default affinity mask once everything is setup */
-		irq_setup_affinity(desc);
-
 	} else if (new->flags & IRQF_TRIGGER_MASK) {
 		unsigned int nmsk = new->flags & IRQF_TRIGGER_MASK;
 		unsigned int omsk = irqd_get_trigger_type(&desc->irq_data);