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Errors from enable_irq_wake() in gpio_set_wake_irq() were silently ignored.
Thus led to the problem that gpio_set_wake_irq() always returned
successfully, even if enable_irq_wake() returned an error.
Signed-off-by: Philipp Rosenberger <p.rosenberger@linutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>