Commit ef80e87d authored by Thomas Gleixner's avatar Thomas Gleixner

pinctrl/sun4i: 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: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Fan Wu <fwu@marvell.com>
Cc: abdoulaye berthe <berthe.ab@gmail.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Cc: linux-gpio@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
parent 623a650e
...@@ -1005,9 +1005,9 @@ int sunxi_pinctrl_init(struct platform_device *pdev, ...@@ -1005,9 +1005,9 @@ int sunxi_pinctrl_init(struct platform_device *pdev,
writel(0xffffffff, writel(0xffffffff,
pctl->membase + sunxi_irq_status_reg_from_bank(i)); pctl->membase + sunxi_irq_status_reg_from_bank(i));
irq_set_chained_handler(pctl->irq[i], irq_set_chained_handler_and_data(pctl->irq[i],
sunxi_pinctrl_irq_handler); sunxi_pinctrl_irq_handler,
irq_set_handler_data(pctl->irq[i], pctl); pctl);
} }
dev_info(&pdev->dev, "initialized sunXi PIO driver\n"); dev_info(&pdev->dev, "initialized sunXi PIO driver\n");
......
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