Use ERR_CAT inlined function to replace the ERR_PTR(PTR_ERR). It
make the code more concise.
Signed-off-by: Nzhong jiang <zhongjiang@huawei.com>
Signed-off-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>