Use the IS_ERR_OR_NULL() helper instead of open-coding a
NULL and an error pointer checks to simplify the code and
improve readability.
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Link: https://patch.msgid.link/20240828122829.3697502-1-lihongbo22@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>