[1/3] max3100: added raise_threaded_irq

Commit Message

christian pellegrin March 19, 2010, 8:38 a.m. UTC

None

Patch

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);