genirq: Mark wakeup sources as armed on suspend

This allows us to utilize this information in the irq_may_run() check
without adding another conditional to the fast path.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

include/linux/irq.h

@@ -173,6 +173,7 @@ struct irq_data {
  * IRQD_IRQ_DISABLED		- Disabled state of the interrupt
  * IRQD_IRQ_MASKED		- Masked state of the interrupt
  * IRQD_IRQ_INPROGRESS		- In progress state of the interrupt
+ * IRQD_WAKEUP_ARMED		- Wakeup mode armed
  */
 enum {
 	IRQD_TRIGGER_MASK		= 0xf,
@@ -186,6 +187,7 @@ enum {
 	IRQD_IRQ_DISABLED		= (1 << 16),
 	IRQD_IRQ_MASKED			= (1 << 17),
 	IRQD_IRQ_INPROGRESS		= (1 << 18),
+	IRQD_WAKEUP_ARMED		= (1 << 19),
 };
 
 static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
@@ -257,6 +259,12 @@ static inline bool irqd_irq_inprogress(struct irq_data *d)
 	return d->state_use_accessors & IRQD_IRQ_INPROGRESS;
 }
 
+static inline bool irqd_is_wakeup_armed(struct irq_data *d)
+{
+	return d->state_use_accessors & IRQD_WAKEUP_ARMED;
+}
+
+
 /*
  * Functions for chained handlers which can be enabled/disabled by the
  * standard disable_irq/enable_irq calls. Must be called with

kernel/irq/pm.c

@@ -54,6 +54,9 @@ static bool suspend_device_irq(struct irq_desc *desc, int irq)
 	if (!desc->action || desc->no_suspend_depth)
 		return false;
 
+	if (irqd_is_wakeup_set(&desc->irq_data))
+		irqd_set(&desc->irq_data, IRQD_WAKEUP_ARMED);
+
 	desc->istate |= IRQS_SUSPENDED;
 	__disable_irq(desc, irq);
 
@@ -101,6 +104,8 @@ EXPORT_SYMBOL_GPL(suspend_device_irqs);
 
 static void resume_irq(struct irq_desc *desc, int irq)
 {
+	irqd_clear(&desc->irq_data, IRQD_WAKEUP_ARMED);
+
 	if (desc->istate & IRQS_SUSPENDED)
 		goto resume;