1 files changed, 22 insertions, 7 deletions

diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index 1fec0f9b1508..679e7bbbbcd6 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -2216,10 +2216,9 @@ static void set_ir_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
 asmlinkage void smp_irq_move_cleanup_interrupt(void)
 {
         unsigned vector, me;
+
         ack_APIC_irq();
-#ifdef CONFIG_X86_64
         exit_idle();
-#endif
         irq_enter();
 
         me = smp_processor_id();
@@ -3755,7 +3754,9 @@ int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
 void __init setup_ioapic_dest(void)
 {
         int pin, ioapic, irq, irq_entry;
+        struct irq_desc *desc;
         struct irq_cfg *cfg;
+        cpumask_t mask;
 
         if (skip_ioapic_setup == 1)
                 return;
@@ -3772,16 +3773,30 @@ void __init setup_ioapic_dest(void)
                          * cpu is online.
                          */
                         cfg = irq_cfg(irq);
-                        if (!cfg->vector)
+                        if (!cfg->vector) {
                                 setup_IO_APIC_irq(ioapic, pin, irq,
                                                   irq_trigger(irq_entry),
                                                   irq_polarity(irq_entry));
+                                continue;
+
+                        }
+
+                        /*
+                         * Honour affinities which have been set in early boot
+                         */
+                        desc = irq_to_desc(irq);
+                        if (desc->status &
+                            (IRQ_NO_BALANCING | IRQ_AFFINITY_SET))
+                                mask = desc->affinity;
+                        else
+                                mask = TARGET_CPUS;
+
 #ifdef CONFIG_INTR_REMAP
-                        else if (intr_remapping_enabled)
-                                set_ir_ioapic_affinity_irq(irq, TARGET_CPUS);
-#endif
+                        if (intr_remapping_enabled)
+                                set_ir_ioapic_affinity_irq(irq, mask);
                         else
-                                set_ioapic_affinity_irq(irq, TARGET_CPUS);
+#endif
+                                set_ioapic_affinity_irq(irq, mask);
                 }
 
         }