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authorThomas Gleixner <tglx@linutronix.de>2015-06-21 20:16:16 +0200
committerThomas Gleixner <tglx@linutronix.de>2015-06-25 11:57:11 +0200
commitbb56fc3577ea38ee6f7d4aaf25473ebd0f1337a0 (patch)
treebed16371656de68dee11ecfe38272d727580d327 /drivers/pinctrl/samsung
parent1b11b0cb799e5f82ca6391a23eaa8f41c7466cc0 (diff)
downloadop-kernel-dev-bb56fc3577ea38ee6f7d4aaf25473ebd0f1337a0.zip
op-kernel-dev-bb56fc3577ea38ee6f7d4aaf25473ebd0f1337a0.tar.gz
pinctrl/exynos: 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: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-gpio@vger.kernel.org
Diffstat (limited to 'drivers/pinctrl/samsung')
-rw-r--r--drivers/pinctrl/samsung/pinctrl-exynos.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index 0b7afa5..b18dabb 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -563,8 +563,8 @@ static int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
return -ENOMEM;
}
- irq_set_chained_handler(irq, exynos_irq_demux_eint16_31);
- irq_set_handler_data(irq, muxed_data);
+ irq_set_chained_handler_and_data(irq, exynos_irq_demux_eint16_31,
+ muxed_data);
bank = d->pin_banks;
idx = 0;
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