From 623a650ebc886f6a6827d9ccc38856ab10391a9c Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sun, 21 Jun 2015 20:16:18 +0200 Subject: [PATCH] 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 Signed-off-by: Thomas Gleixner Cc: Julia Lawall Cc: Tomasz Figa Cc: Thomas Abraham Cc: Linus Walleij 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 | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/pinctrl/samsung/pinctrl-s3c64xx.c b/drivers/pinctrl/samsung/pinctrl-s3c64xx.c index 7756c1e9e763..ec8cc3b47621 100644 --- a/drivers/pinctrl/samsung/pinctrl-s3c64xx.c +++ b/drivers/pinctrl/samsung/pinctrl-s3c64xx.c @@ -506,8 +506,7 @@ static int s3c64xx_eint_gpio_init(struct samsung_pinctrl_drv_data *d) data->domains[nr_domains++] = bank->irq_domain; } - irq_set_chained_handler(d->irq, s3c64xx_eint_gpio_irq); - irq_set_handler_data(d->irq, data); + irq_set_chained_handler_and_data(d->irq, s3c64xx_eint_gpio_irq, data); return 0; } @@ -731,8 +730,9 @@ static int s3c64xx_eint_eint0_init(struct samsung_pinctrl_drv_data *d) return -ENXIO; } - irq_set_chained_handler(irq, s3c64xx_eint0_handlers[i]); - irq_set_handler_data(irq, data); + irq_set_chained_handler_and_data(irq, + s3c64xx_eint0_handlers[i], + data); } bank = d->pin_banks; -- 2.20.1