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Using guard notation makes the code more compact and error handling more robust by ensuring that mutexes are released in all code paths when control leaves critical section. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/Zxr4nF-igbrmgq85@google.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>