raise_threaded_irq schedules the execution of an interrupt thread
Signed-off-by: Christian Pellegrin <[email protected]>
---
include/linux/interrupt.h | 3 +++
kernel/irq/manage.c | 27 +++++++++++++++++++++++++++
2 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 75f3f00..14c0c13 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -144,6 +144,9 @@ request_threaded_irq(unsigned int irq, irq_handler_t
handler,
static inline void exit_irq_thread(void) { }
#endif
+extern int raise_threaded_irq(unsigned int irq);
+
+
extern void free_irq(unsigned int, void *);
struct device;
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index eb6078c..a7d21e0 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1088,3 +1088,30 @@ int request_threaded_irq(unsigned int irq, irq_handler_t
handler,
return retval;
}
EXPORT_SYMBOL(request_threaded_irq);
+
+/**
+ * raise_threaded_irq - triggers a threded interrupt
+ * @irq: Interrupt line to trigger
+ */
+int raise_threaded_irq(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ struct irqaction *action;
+
+ if (!desc)
+ return -ENOENT;
+ action = desc->action;
+ if (!action)
+ return -ENOENT;
+ if (unlikely(!action->thread_fn))
+ return -EINVAL;
+ if (likely(!test_bit(IRQTF_DIED,
+ &action->thread_flags))) {
+ set_bit(IRQTF_RUNTHREAD, &action->thread_flags);
+ wake_up_process(action->thread);
+ } else {
+ return -ECHILD;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(raise_threaded_irq);
--
1.5.6.5
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