gpio: flush direction status in gpiochip_lock_as_irq()
As irqchip and gpiochip functions are orthogonal, the IRQ set-up or something else can have changed the direction of the GPIO line from what the GPIO descriptor knows when we get into gpiochip_lock_as_irq(). Make sure to re-read the direction setting if we have the .get_direction() callback enabled for the chip. Else we get problems like this: iio iio:device2: interrupts on the rising edge gpio gpiochip2: (8012e080.gpio): gpiochip_lock_as_irq: tried to flag a GPIO set as output for IRQ gpio gpiochip2: (8012e080.gpio): unable to lock HW IRQ 0 for IRQ genirq: Failed to request resources for l3g4200d-trigger (irq 111) on irqchip nmk1-32-63 iio iio:device2: failed to request trigger IRQ. st-gyro-i2c: probe of 2-0068 failed with error -22 Fixes: 72d32000 ("gpio: set up initial state from .get_direction()") Signed-off-by:Linus Walleij <linus.walleij@linaro.org>
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320a6480
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