genirq: add unlocked version of set_irq_handler()
Add unlocked version for use by irq_chip.set_type handlers which may
wish to change handler to level or edge handler when IRQ type is
changed.
The normal set_irq_handler() call cannot be used because it tries to
take irq_desc.lock which is already held when the irq_chip.set_type
hook is called.
Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/linux/irq.h b/include/linux/irq.h
index efc88538..4669be0 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -339,6 +339,13 @@
__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
const char *name);
+/* caller has locked the irq_desc and both params are valid */
+static inline void __set_irq_handler_unlocked(int irq,
+ irq_flow_handler_t handler)
+{
+ irq_desc[irq].handle_irq = handler;
+}
+
/*
* Set a highlevel flow handler for a given IRQ:
*/