diff options
Diffstat (limited to 'kernel/irq/chip.c')
| -rw-r--r-- | kernel/irq/chip.c | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 857f5f4c8098..b9b9618e1aca 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -945,6 +945,33 @@ void handle_percpu_devid_irq(struct irq_desc *desc) } /** + * handle_percpu_devid_fasteoi_ipi - Per CPU local IPI handler with per cpu + * dev ids + * @desc: the interrupt description structure for this irq + * + * The biggest difference with the IRQ version is that the interrupt is + * EOIed early, as the IPI could result in a context switch, and we need to + * make sure the IPI can fire again. We also assume that the arch code has + * registered an action. If not, we are positively doomed. + */ +void handle_percpu_devid_fasteoi_ipi(struct irq_desc *desc) +{ + struct irq_chip *chip = irq_desc_get_chip(desc); + struct irqaction *action = desc->action; + unsigned int irq = irq_desc_get_irq(desc); + irqreturn_t res; + + __kstat_incr_irqs_this_cpu(desc); + + if (chip->irq_eoi) + chip->irq_eoi(&desc->irq_data); + + trace_irq_handler_entry(irq, action); + res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id)); + trace_irq_handler_exit(irq, action, res); +} + +/** * handle_percpu_devid_fasteoi_nmi - Per CPU local NMI handler with per cpu * dev ids * @desc: the interrupt description structure for this irq @@ -1541,18 +1568,17 @@ EXPORT_SYMBOL_GPL(irq_chip_release_resources_parent); */ int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) { - struct irq_data *pos = NULL; + struct irq_data *pos; -#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY - for (; data; data = data->parent_data) -#endif + for (pos = NULL; !pos && data; data = irqd_get_parent_data(data)) { if (data->chip && data->chip->irq_compose_msi_msg) pos = data; + } + if (!pos) return -ENOSYS; pos->chip->irq_compose_msi_msg(pos, msg); - return 0; } |