1 2 #include <linux/irq.h> 3 #include <linux/interrupt.h> 4 5 #include "internals.h" 6 7 void irq_move_masked_irq(struct irq_data *idata) 8 { 9 struct irq_desc *desc = irq_data_to_desc(idata); 10 struct irq_chip *chip = desc->irq_data.chip; 11 12 if (likely(!irqd_is_setaffinity_pending(&desc->irq_data))) 13 return; 14 15 irqd_clr_move_pending(&desc->irq_data); 16 17 /* 18 * Paranoia: cpu-local interrupts shouldn't be calling in here anyway. 19 */ 20 if (irqd_is_per_cpu(&desc->irq_data)) { 21 WARN_ON(1); 22 return; 23 } 24 25 if (unlikely(cpumask_empty(desc->pending_mask))) 26 return; 27 28 if (!chip->irq_set_affinity) 29 return; 30 31 assert_raw_spin_locked(&desc->lock); 32 33 /* 34 * If there was a valid mask to work with, please 35 * do the disable, re-program, enable sequence. 36 * This is *not* particularly important for level triggered 37 * but in a edge trigger case, we might be setting rte 38 * when an active trigger is coming in. This could 39 * cause some ioapics to mal-function. 40 * Being paranoid i guess! 41 * 42 * For correct operation this depends on the caller 43 * masking the irqs. 44 */ 45 if (cpumask_any_and(desc->pending_mask, cpu_online_mask) < nr_cpu_ids) 46 irq_do_set_affinity(&desc->irq_data, desc->pending_mask, false); 47 48 cpumask_clear(desc->pending_mask); 49 } 50 51 void irq_move_irq(struct irq_data *idata) 52 { 53 bool masked; 54 55 /* 56 * Get top level irq_data when CONFIG_IRQ_DOMAIN_HIERARCHY is enabled, 57 * and it should be optimized away when CONFIG_IRQ_DOMAIN_HIERARCHY is 58 * disabled. So we avoid an "#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY" here. 59 */ 60 idata = irq_desc_get_irq_data(irq_data_to_desc(idata)); 61 62 if (likely(!irqd_is_setaffinity_pending(idata))) 63 return; 64 65 if (unlikely(irqd_irq_disabled(idata))) 66 return; 67 68 /* 69 * Be careful vs. already masked interrupts. If this is a 70 * threaded interrupt with ONESHOT set, we can end up with an 71 * interrupt storm. 72 */ 73 masked = irqd_irq_masked(idata); 74 if (!masked) 75 idata->chip->irq_mask(idata); 76 irq_move_masked_irq(idata); 77 if (!masked) 78 idata->chip->irq_unmask(idata); 79 } 80