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gpio: fix sleep-while-atomic in gpiochip_remove 

Move direct and indirect calls to gpiochip_remove_pin_ranges outside of
spin lock as they can end up taking a mutex in pinctrl_remove_gpio_range.

Note that the pin ranges are already added outside of the lock.

Fixes: 9ef0d6f762 ("gpiolib: call pin removal in chip removal function")
Fixes: f23f1516b6 ("gpiolib: provide provision to register pin ranges")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Johan Hovold 2015-01-12 17:12:28 +01:00 committed by Linus Walleij
parent 00acc3dc24
commit 6798acaa01
1 changed files with 1 additions and 3 deletions
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4
drivers/gpio/gpiolib.c
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@ -330,12 +330,10 @@ void gpiochip_remove(struct gpio_chip *chip)
gpiochip_irqchip_remove(chip);
acpi_gpiochip_remove(chip);
spin_lock_irqsave(&gpio_lock, flags);
gpiochip_remove_pin_ranges(chip);
of_gpiochip_remove(chip);
spin_lock_irqsave(&gpio_lock, flags);
for (id = 0; id < chip->ngpio; id++) {
if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags))
dev_crit(chip->dev, "REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED\n");