gpio/dwapb: Fix race in installing chained IRQ handler

Author: Thomas Gleixner <tglx@linutronix.de>

Fix a race where a pending interrupt could be received and the handler
called before the handler's data has been setup, by converting to
irq_set_chained_handler_and_data().

Search and conversion was done with coccinelle:

@@
expression E1, E2, E3;
@@
(
-if (irq_set_chained_handler(E1, E3) != 0)
-   BUG();
|
-irq_set_chained_handler(E1, E3);
)
-irq_set_handler_data(E1, E2);
+irq_set_chained_handler_and_data(E1, E3, E2);

@@
expression E1, E2, E3;
@@
(
-if (irq_set_chained_handler(E1, E3) != 0)
-   BUG();
...
|
-irq_set_chained_handler(E1, E3);
...
)
-irq_set_handler_data(E1, E2);
+irq_set_chained_handler_and_data(E1, E3, E2);

Reported-by: Russell King 
Signed-off-by: Thomas Gleixner 
Cc: Julia Lawall 
Cc: Linus Walleij 
Cc: Alexandre Courbot 
Cc: linux-gpio@vger.kernel.org

---
 drivers/gpio/gpio-dwapb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
 
diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 58faf04..55fa985 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -348,8 +348,8 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 	irq_gc->chip_types[1].handler = handle_edge_irq;
 
 	if (!pp->irq_shared) {
-		irq_set_chained_handler(pp->irq, dwapb_irq_handler);
-		irq_set_handler_data(pp->irq, gpio);
+		irq_set_chained_handler_and_data(pp->irq, dwapb_irq_handler,
+						 gpio);
 	} else {
 		/*
 		 * Request a shared IRQ since where MFD would have devices