Using PTR_ERR_OR_ZERO() instead of IS_ERR() works, but it's not how
you're supposed to write these conditions.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>