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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>
This commit is contained in:
Thomas Gleixner 2014-08-29 13:39:37 +02:00 committed by Rafael J. Wysocki
parent c3d7acd027
commit c7bd3ec053
1 changed files with 20 additions and 28 deletions
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48
kernel/irq/chip.c
View File

@ -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
@ -359,9 +366,8 @@ 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))
goto out_unlock;
if (!irq_may_run(desc))
goto out_unlock;
desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
kstat_incr_irqs_this_cpu(irq, desc);
@ -412,9 +418,8 @@ 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))
goto out_unlock;
if (!irq_may_run(desc))
goto out_unlock;
desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
kstat_incr_irqs_this_cpu(irq, desc);
@ -485,9 +490,8 @@ 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))
goto out;
if (!irq_may_run(desc))
goto out;
desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
kstat_incr_irqs_this_cpu(irq, desc);
@ -541,16 +545,10 @@ 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)) {
desc->istate |= IRQS_PENDING;
mask_ack_irq(desc);
goto out_unlock;
}
if (!irq_may_run(desc)) {
desc->istate |= IRQS_PENDING;
mask_ack_irq(desc);
goto out_unlock;
}
/*
@ -612,15 +610,9 @@ 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)) {
desc->istate |= IRQS_PENDING;
goto out_eoi;
}
if (!irq_may_run(desc)) {
desc->istate |= IRQS_PENDING;
goto out_eoi;
}
/*