diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2015-06-21 18:16:04 (GMT) |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2015-06-25 09:56:45 (GMT) |
commit | b34cc62084e8c44f7c85e95bfc19e21d07f25173 (patch) | |
tree | 31be19efef3de39662ba41658e142df582d397fb /drivers | |
parent | 407a2c720556e8e340e06f6a7174f5d6d80cf9ea (diff) | |
download | linux-b34cc62084e8c44f7c85e95bfc19e21d07f25173.tar.xz |
gpio/bcm-kona: 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: Ray Jui <rjui@broadcom.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: linux-gpio@vger.kernel.org
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpio/gpio-bcm-kona.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c index b164ce8..fc214c3 100644 --- a/drivers/gpio/gpio-bcm-kona.c +++ b/drivers/gpio/gpio-bcm-kona.c @@ -651,8 +651,9 @@ static int bcm_kona_gpio_probe(struct platform_device *pdev) } for (i = 0; i < kona_gpio->num_bank; i++) { bank = &kona_gpio->banks[i]; - irq_set_chained_handler(bank->irq, bcm_kona_gpio_irq_handler); - irq_set_handler_data(bank->irq, bank); + irq_set_chained_handler_and_data(bank->irq, + bcm_kona_gpio_irq_handler, + bank); } spin_lock_init(&kona_gpio->lock); |