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-rw-r--r--include/linux/interrupt.h1
-rw-r--r--kernel/irq/handle.c4
-rw-r--r--kernel/irq/internals.h1
-rw-r--r--kernel/irq/manage.c27
4 files changed, 31 insertions, 2 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index a2678d3..c7bfac1 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -188,6 +188,7 @@ extern void disable_irq(unsigned int irq);
extern void disable_percpu_irq(unsigned int irq);
extern void enable_irq(unsigned int irq);
extern void enable_percpu_irq(unsigned int irq, unsigned int type);
+extern void irq_wake_thread(unsigned int irq, void *dev_id);
/* The following three functions are for the core kernel use only. */
extern void suspend_device_irqs(void);
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 131ca17..bfec453 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -51,7 +51,7 @@ static void warn_no_thread(unsigned int irq, struct irqaction *action)
"but no thread function available.", irq, action->name);
}
-static void irq_wake_thread(struct irq_desc *desc, struct irqaction *action)
+void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action)
{
/*
* In case the thread crashed and was killed we just pretend that
@@ -157,7 +157,7 @@ handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action)
break;
}
- irq_wake_thread(desc, action);
+ __irq_wake_thread(desc, action);
/* Fall through to add to randomness */
case IRQ_HANDLED:
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 001fa5b..d61ac29 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -82,6 +82,7 @@ irqreturn_t handle_irq_event(struct irq_desc *desc);
/* Resending of interrupts :*/
void check_irq_resend(struct irq_desc *desc, unsigned int irq);
bool irq_wait_for_poll(struct irq_desc *desc);
+void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);
#ifdef CONFIG_PROC_FS
extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 274ba92..54eb5c9 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -911,6 +911,33 @@ static int irq_thread(void *data)
return 0;
}
+/**
+ * irq_wake_thread - wake the irq thread for the action identified by dev_id
+ * @irq: Interrupt line
+ * @dev_id: Device identity for which the thread should be woken
+ *
+ */
+void irq_wake_thread(unsigned int irq, void *dev_id)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ struct irqaction *action;
+ unsigned long flags;
+
+ if (!desc || WARN_ON(irq_settings_is_per_cpu_devid(desc)))
+ return;
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ for (action = desc->action; action; action = action->next) {
+ if (action->dev_id == dev_id) {
+ if (action->thread)
+ __irq_wake_thread(desc, action);
+ break;
+ }
+ }
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+}
+EXPORT_SYMBOL_GPL(irq_wake_thread);
+
static void irq_setup_forced_threading(struct irqaction *new)
{
if (!force_irqthreads)
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