pinctrl/samsung: Fix race in installing chained IRQ handler
authorThomas Gleixner <tglx@linutronix.de>
Sun, 21 Jun 2015 18:16:18 +0000 (20:16 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 25 Jun 2015 09:57:15 +0000 (11:57 +0200)
commit623a650ebc886f6a6827d9ccc38856ab10391a9c
tree121de332fd5cd76a26076c998709353f844cf632
parent0cfc45cfdf5065cd02e1120169e1de7eb774ae3e
pinctrl/samsung: Fix race in installing chained IRQ handler

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 <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-gpio@vger.kernel.org
drivers/pinctrl/samsung/pinctrl-s3c64xx.c