genirq: Uninline and sanity check generic_handle_irq()

generic_handle_irq() is missing a NULL pointer check for the result of
irq_to_desc. This was a not a big problem, but we want to expose it to
drivers, so we better have sanity checks in place. Add a return value
as well, which indicates that the irq number was valid and the handler
was invoked.

Based on the pure code move from Jonathan Cameron.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jonathan Cameron <jic23@cam.ac.uk>

1 files changed, 1 insertions, 4 deletions

diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index c70b1aa4b93a..2d921b35212c 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -111,10 +111,7 @@ static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *de
         desc->handle_irq(irq, desc);
 }
 
-static inline void generic_handle_irq(unsigned int irq)
-{
-        generic_handle_irq_desc(irq, irq_to_desc(irq));
-}
+int generic_handle_irq(unsigned int irq);
 
 /* Test to see if a driver has successfully requested an irq */
 static inline int irq_has_action(unsigned int irq)