Checking '< 0' for unsigned variables always returns false. For error
codes, use IS_ERR_VALUE() instead.
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>