#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 = desc->irq_data.chip; if (likely(!irqd_is_setaffinity_pending(&desc->irq_data))) return; irqd_clr_move_pending(&desc->irq_data); /* * Paranoia: cpu-local interrupts shouldn't be calling in here anyway. */ if (irqd_is_per_cpu(&desc->irq_data)) { WARN_ON(1); return; } 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; /* * Get top level irq_data when CONFIG_IRQ_DOMAIN_HIERARCHY is enabled, * and it should be optimized away when CONFIG_IRQ_DOMAIN_HIERARCHY is * disabled. So we avoid an "#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY" here. */ idata = irq_desc_get_irq_data(irq_data_to_desc(idata)); 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); }