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gpio: fix memory leak and sleep-while-atomic
Fix memory leak and sleep-while-atomic in gpiochip_remove. The memory leak was introduced byafa82fab5e
("gpio / ACPI: Move event handling registration to gpiolib irqchip helpers") that moved the release of acpi interrupt resources to gpiochip_irqchip_remove, but by then the resources are no longer accessible as the acpi_gpio_chip has already been freed by acpi_gpiochip_remove. Note that this also fixes a few potential sleep-while-atomics, which has been around since1425052097
("gpio: add IRQ chip helpers in gpiolib") when the call to gpiochip_irqchip_remove while holding a spinlock was added (a couple of irq-domain paths can end up grabbing mutexes). Fixes:afa82fab5e
("gpio / ACPI: Move event handling registration to gpiolib irqchip helpers") Fixes:1425052097
("gpio: add IRQ chip helpers in gpiolib") Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -327,11 +327,12 @@ void gpiochip_remove(struct gpio_chip *chip)
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unsigned long flags;
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unsigned id;
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gpiochip_irqchip_remove(chip);
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acpi_gpiochip_remove(chip);
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spin_lock_irqsave(&gpio_lock, flags);
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gpiochip_irqchip_remove(chip);
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gpiochip_remove_pin_ranges(chip);
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of_gpiochip_remove(chip);
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