diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/debugfs.c | 3 | ||||
| -rw-r--r-- | kernel/irq/pm.c | 34 |
2 files changed, 33 insertions, 4 deletions
diff --git a/kernel/irq/debugfs.c b/kernel/irq/debugfs.c index b95ff5d5f4bd..b6e10945e8be 100644 --- a/kernel/irq/debugfs.c +++ b/kernel/irq/debugfs.c @@ -57,6 +57,7 @@ static const struct irq_bit_descr irqchip_flags[] = { BIT_MASK_DESCR(IRQCHIP_EOI_THREADED), BIT_MASK_DESCR(IRQCHIP_SUPPORTS_LEVEL_MSI), BIT_MASK_DESCR(IRQCHIP_SUPPORTS_NMI), + BIT_MASK_DESCR(IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND), }; static void @@ -125,6 +126,8 @@ static const struct irq_bit_descr irqdata_states[] = { BIT_MASK_DESCR(IRQD_DEFAULT_TRIGGER_SET), BIT_MASK_DESCR(IRQD_HANDLE_ENFORCE_IRQCTX), + + BIT_MASK_DESCR(IRQD_IRQ_ENABLED_ON_SUSPEND), }; static const struct irq_bit_descr irqdesc_states[] = { diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c index c6c7e187ae74..ce0adb22ee96 100644 --- a/kernel/irq/pm.c +++ b/kernel/irq/pm.c @@ -69,12 +69,26 @@ void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) static bool suspend_device_irq(struct irq_desc *desc) { + unsigned long chipflags = irq_desc_get_chip(desc)->flags; + struct irq_data *irqd = &desc->irq_data; + if (!desc->action || irq_desc_is_chained(desc) || desc->no_suspend_depth) return false; - if (irqd_is_wakeup_set(&desc->irq_data)) { - irqd_set(&desc->irq_data, IRQD_WAKEUP_ARMED); + if (irqd_is_wakeup_set(irqd)) { + irqd_set(irqd, IRQD_WAKEUP_ARMED); + + if ((chipflags & IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND) && + irqd_irq_disabled(irqd)) { + /* + * Interrupt marked for wakeup is in disabled state. + * Enable interrupt here to unmask/enable in irqchip + * to be able to resume with such interrupts. + */ + __enable_irq(desc); + irqd_set(irqd, IRQD_IRQ_ENABLED_ON_SUSPEND); + } /* * We return true here to force the caller to issue * synchronize_irq(). We need to make sure that the @@ -93,7 +107,7 @@ static bool suspend_device_irq(struct irq_desc *desc) * chip level. The chip implementation indicates that with * IRQCHIP_MASK_ON_SUSPEND. */ - if (irq_desc_get_chip(desc)->flags & IRQCHIP_MASK_ON_SUSPEND) + if (chipflags & IRQCHIP_MASK_ON_SUSPEND) mask_irq(desc); return true; } @@ -137,7 +151,19 @@ EXPORT_SYMBOL_GPL(suspend_device_irqs); static void resume_irq(struct irq_desc *desc) { - irqd_clear(&desc->irq_data, IRQD_WAKEUP_ARMED); + struct irq_data *irqd = &desc->irq_data; + + irqd_clear(irqd, IRQD_WAKEUP_ARMED); + + if (irqd_is_enabled_on_suspend(irqd)) { + /* + * Interrupt marked for wakeup was enabled during suspend + * entry. Disable such interrupts to restore them back to + * original state. + */ + __disable_irq(desc); + irqd_clear(irqd, IRQD_IRQ_ENABLED_ON_SUSPEND); + } if (desc->istate & IRQS_SUSPENDED) goto resume; |