'err' will be initialized and cleanup the redundant initialization. Cc: Joerg Roedel <joro@8bytes.org> Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com> Link: https://lore.kernel.org/r/1621395447-34738-1-git-send-email-zhangshaokun@hisilicon.com Signed-off-by: Joerg Roedel <jroedel@suse.de>