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authorThomas Gleixner <tglx@linutronix.de>2015-07-13 23:22:44 +0200
committerThomas Gleixner <tglx@linutronix.de>2015-07-13 23:24:48 +0200
commit20483d04ae6f373858f3ca28cd7e26b66106d937 (patch)
tree92636cc4bde53cf46fc9b2dfaab2fb8eb95c7faf /drivers/gpio
parent01e2d0627a9a6edb24c37db45db5ecb31e9de808 (diff)
gpio/davinci: 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. 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: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-davinci.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index c5e05c82d67c..c246ac3dda7c 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -578,15 +578,13 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
writel_relaxed(~0, &g->clr_falling);
writel_relaxed(~0, &g->clr_rising);
- /* set up all irqs in this bank */
- irq_set_chained_handler(bank_irq, gpio_irq_handler);
-
/*
* Each chip handles 32 gpios, and each irq bank consists of 16
* gpio irqs. Pass the irq bank's corresponding controller to
* the chained irq handler.
*/
- irq_set_handler_data(bank_irq, &chips[gpio / 32]);
+ irq_set_chained_handler_and_data(bank_irq, gpio_irq_handler,
+ &chips[gpio / 32]);
binten |= BIT(bank);
}