sh: Use dummy_irq_chip for INTC redirect vectors.

Presently there's an ordering issue with the chained handler change
which places the set_irq_chip() after set_irq_chained_handler(). This
causes a warning to be emitted as the IRQ chip needs to be set first.
However, there is the caveat that redirect IRQs can't use the parent
IRQ's irq chip as they are just dummy redirects, resulting in
intc_enable() blowing up when set_irq_chained_handler() attempts to
start up the redirect IRQ. In these cases we can just use dummy_irq_chip
directly, as we already extract the parent IRQ and chip from the redirect
handler.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c
index 1da1edef22214f81208533d81028fa45088ef94b..3a5a17db94744d73d1086b0bc3e89ef6bdb62e52 100644 (file)
--- a/drivers/sh/intc.c
+++ b/drivers/sh/intc.c
@@ -899,8 +899,8 @@ void __init register_intc_controller(struct intc_desc *desc)
                        vect2->enum_id = 0;
 
                        /* redirect this interrupts to the first one */
+                       set_irq_chip(irq2, &dummy_irq_chip);
                        set_irq_chained_handler(irq2, intc_redirect_irq);
-                       set_irq_chip(irq2, &d->chip);
                        set_irq_data(irq2, (void *)irq);
                }
        }