[ Upstream commit afcdb8e55c91c6ff0700ab272fd0f74e899ab884 ] If an error occurs, debugfs_create_file() will return ERR_PTR(-ERROR), so use IS_ERR() to check it. Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org>