pinctrl/exynos: 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: Tomasz Figa 
Cc: Thomas Abraham 
Cc: Linus Walleij 
Cc: Kukjin Kim 
Cc: Krzysztof Kozlowski 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-gpio@vger.kernel.org

---
 drivers/pinctrl/samsung/pinctrl-exynos.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
 
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index 0b7afa5..b18dabb 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -563,8 +563,8 @@ static int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
 		return -ENOMEM;
 	}
 
-	irq_set_chained_handler(irq, exynos_irq_demux_eint16_31);
-	irq_set_handler_data(irq, muxed_data);
+	irq_set_chained_handler_and_data(irq, exynos_irq_demux_eint16_31,
+					 muxed_data);
 
 	bank = d->pin_banks;
 	idx = 0;