genirq: Create helper for flow handler entry check

All flow handlers - except the per cpu ones - check for an interrupt
in progress and an eventual concurrent polling on another cpu.

Create a helper function for the repeated code pattern.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

kernel/irq/chip.c

@@ -342,6 +342,13 @@ static bool irq_check_poll(struct irq_desc *desc)
 	return irq_wait_for_poll(desc);
 }
 
+static bool irq_may_run(struct irq_desc *desc)
+{
+	if (!irqd_irq_inprogress(&desc->irq_data))
+		return true;
+	return irq_check_poll(desc);
+}
+
 /**
  *	handle_simple_irq - Simple and software-decoded IRQs.
  *	@irq:	the interrupt number
@@ -359,8 +366,7 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
 {
 	raw_spin_lock(&desc->lock);
 
-	if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
-		if (!irq_check_poll(desc))
+	if (!irq_may_run(desc))
 		goto out_unlock;
 
 	desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
@@ -412,8 +418,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
 	raw_spin_lock(&desc->lock);
 	mask_ack_irq(desc);
 
-	if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
-		if (!irq_check_poll(desc))
+	if (!irq_may_run(desc))
 		goto out_unlock;
 
 	desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
@@ -485,8 +490,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
 
 	raw_spin_lock(&desc->lock);
 
-	if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
-		if (!irq_check_poll(desc))
+	if (!irq_may_run(desc))
 		goto out;
 
 	desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
@@ -541,17 +545,11 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
 
 	desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
 
-	/*
-	 * If the handler is currently running, mark it pending,
-	 * handle the necessary masking and go out
-	 */
-	if (unlikely(irqd_irq_inprogress(&desc->irq_data))) {
-		if (!irq_check_poll(desc)) {
+	if (!irq_may_run(desc)) {
 		desc->istate |= IRQS_PENDING;
 		mask_ack_irq(desc);
 		goto out_unlock;
 	}
-	}
 
 	/*
 	 * If its disabled or no action available then mask it and get
@@ -612,16 +610,10 @@ void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc)
 
 	desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
 
-	/*
-	 * If the handler is currently running, mark it pending,
-	 * handle the necessary masking and go out
-	 */
-	if (unlikely(irqd_irq_inprogress(&desc->irq_data))) {
-		if (!irq_check_poll(desc)) {
+	if (!irq_may_run(desc)) {
 		desc->istate |= IRQS_PENDING;
 		goto out_eoi;
 	}
-	}
 
 	/*
 	 * If its disabled or no action available then mask it and get