From 1b11b0cb799e5f82ca6391a23eaa8f41c7466cc0 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sun, 21 Jun 2015 20:16:15 +0200 Subject: [PATCH] pinctrl/st: 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: Srinivas Kandagatla Cc: Maxime Coquelin Cc: Patrice Chotard Cc: Linus Walleij Cc: linux-arm-kernel@lists.infradead.org Cc: kernel@stlinux.com Cc: linux-gpio@vger.kernel.org --- drivers/pinctrl/pinctrl-st.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c index 65bf73b70e34..10e9c4e8e816 100644 --- a/drivers/pinctrl/pinctrl-st.c +++ b/drivers/pinctrl/pinctrl-st.c @@ -1661,8 +1661,8 @@ static int st_pctl_probe_dt(struct platform_device *pdev, if (IS_ERR(info->irqmux_base)) return PTR_ERR(info->irqmux_base); - irq_set_chained_handler(irq, st_gpio_irqmux_handler); - irq_set_handler_data(irq, info); + irq_set_chained_handler_and_data(irq, st_gpio_irqmux_handler, + info); } -- 2.20.1