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#include <linux/irq.h>
#include <linux/interrupt.h>
#include "internals.h"
void irq_move_masked_irq(struct irq_data *idata)
{
struct irq_desc *desc = irq_data_to_desc(idata);
struct irq_chip *chip = idata->chip;
if (likely(!irqd_is_setaffinity_pending(&desc->irq_data)))
return;
/*
* Paranoia: cpu-local interrupts shouldn't be calling in here anyway.
*/
if (!irqd_can_balance(&desc->irq_data)) {
WARN_ON(1);
return;
}
irqd_clr_move_pending(&desc->irq_data);
if (unlikely(cpumask_empty(desc->pending_mask)))
return;
if (!chip->irq_set_affinity)
return;
assert_raw_spin_locked(&desc->lock);
/*
* If there was a valid mask to work with, please
* do the disable, re-program, enable sequence.
* This is *not* particularly important for level triggered
* but in a edge trigger case, we might be setting rte
* when an active trigger is coming in. This could
* cause some ioapics to mal-function.
* Being paranoid i guess!
*
* For correct operation this depends on the caller
* masking the irqs.
*/
if (cpumask_any_and(desc->pending_mask, cpu_online_mask) < nr_cpu_ids)
irq_do_set_affinity(&desc->irq_data, desc->pending_mask, false);
cpumask_clear(desc->pending_mask);
}
void irq_move_irq(struct irq_data *idata)
{
bool masked;
if (likely(!irqd_is_setaffinity_pending(idata)))
return;
if (unlikely(irqd_irq_disabled(idata)))
return;
/*
* Be careful vs. already masked interrupts. If this is a
* threaded interrupt with ONESHOT set, we can end up with an
* interrupt storm.
*/
masked = irqd_irq_masked(idata);
if (!masked)
idata->chip->irq_mask(idata);
irq_move_masked_irq(idata);
if (!masked)
idata->chip->irq_unmask(idata);
}
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