x86 / PM: Set IRQCHIP_SKIP_SET_WAKE for IOAPIC IRQ chip objects

Set the IRQCHIP_SKIP_SET_WAKE for IOAPIC IRQ chip objects so that
interrupts from them can work as wakeup interrupts for suspend-to-idle.

After this change, running enable_irq_wake() on one of the IRQs in
question will succeed and IRQD_WAKEUP_STATE will be set for it, so
all of the suspend-to-idle wakeup mechanics introduced previously
will work for it automatically.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 337ce5a9b15c86bb7e9ea7747749fed1aee0d2d7..1183d545da1e95a56233f39baf8047a38c77fe22 100644 (file)
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2623,6 +2623,7 @@ static struct irq_chip ioapic_chip __read_mostly = {
        .irq_eoi                = ack_apic_level,
        .irq_set_affinity       = native_ioapic_set_affinity,
        .irq_retrigger          = ioapic_retrigger_irq,
+       .flags                  = IRQCHIP_SKIP_SET_WAKE,
 };
 
 static inline void init_IO_APIC_traps(void)
@@ -3173,6 +3174,7 @@ static struct irq_chip msi_chip = {
        .irq_ack                = ack_apic_edge,
        .irq_set_affinity       = msi_set_affinity,
        .irq_retrigger          = ioapic_retrigger_irq,
+       .flags                  = IRQCHIP_SKIP_SET_WAKE,
 };
 
 int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
@@ -3271,6 +3273,7 @@ static struct irq_chip dmar_msi_type = {
        .irq_ack                = ack_apic_edge,
        .irq_set_affinity       = dmar_msi_set_affinity,
        .irq_retrigger          = ioapic_retrigger_irq,
+       .flags                  = IRQCHIP_SKIP_SET_WAKE,
 };
 
 int arch_setup_dmar_msi(unsigned int irq)
@@ -3321,6 +3324,7 @@ static struct irq_chip hpet_msi_type = {
        .irq_ack = ack_apic_edge,
        .irq_set_affinity = hpet_msi_set_affinity,
        .irq_retrigger = ioapic_retrigger_irq,
+       .flags = IRQCHIP_SKIP_SET_WAKE,
 };
 
 int default_setup_hpet_msi(unsigned int irq, unsigned int id)
@@ -3384,6 +3388,7 @@ static struct irq_chip ht_irq_chip = {
        .irq_ack                = ack_apic_edge,
        .irq_set_affinity       = ht_set_affinity,
        .irq_retrigger          = ioapic_retrigger_irq,
+       .flags                  = IRQCHIP_SKIP_SET_WAKE,
 };
 
 int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)