There is a cut and paste bug so we test the wrong variable.  "err" is
never less than zero at this point.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>