forked from Minki/linux
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
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@ -514,8 +514,7 @@ static int s3c24xx_eint_init(struct samsung_pinctrl_drv_data *d)
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}
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eint_data->parents[i] = irq;
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irq_set_chained_handler(irq, handlers[i]);
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irq_set_handler_data(irq, eint_data);
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irq_set_chained_handler_and_data(irq, handlers[i], eint_data);
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}
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bank = d->pin_banks;
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