]> git.karo-electronics.de Git - linux-beck.git/commit
mfd/asic3: Fix race in installing chained IRQ handler
authorThomas Gleixner <tglx@linutronix.de>
Sun, 21 Jun 2015 18:16:06 +0000 (20:16 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 25 Jun 2015 09:56:52 +0000 (11:56 +0200)
commitc30e30478c74e5be2fa3bbe954084a31f0d60570
tree451a72c83663bbdbb0eabc767b8922fb0967c3f9
parent3fb250ed39b2f883b566826132e04626da5910aa
mfd/asic3: 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: Samuel Ortiz <sameo@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
drivers/mfd/asic3.c