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-rw-r--r--kernel/irq/pm.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c
index d6961d3c6f9e..8f557fa1f4fe 100644
--- a/kernel/irq/pm.c
+++ b/kernel/irq/pm.c
@@ -177,6 +177,26 @@ static void resume_irqs(bool want_early)
}
/**
+ * rearm_wake_irq - rearm a wakeup interrupt line after signaling wakeup
+ * @irq: Interrupt to rearm
+ */
+void rearm_wake_irq(unsigned int irq)
+{
+ unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
+
+ if (!desc || !(desc->istate & IRQS_SUSPENDED) ||
+ !irqd_is_wakeup_set(&desc->irq_data))
+ return;
+
+ desc->istate &= ~IRQS_SUSPENDED;
+ irqd_set(&desc->irq_data, IRQD_WAKEUP_ARMED);
+ __enable_irq(desc);
+
+ irq_put_desc_busunlock(desc, flags);
+}
+
+/**
* irq_pm_syscore_ops - enable interrupt lines early
*
* Enable all interrupt lines with %IRQF_EARLY_RESUME set.