From patchwork Tue Sep 3 14:39:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Zetao X-Patchwork-Id: 13788820 X-Patchwork-Delegate: iweiny@gmail.com Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5DC446F2E3 for ; Tue, 3 Sep 2024 14:30:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.187 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725373841; cv=none; b=VRrFIcc/HJvQvUszdnbYHLOhoxz+jICxVHW8n7aoucCsXwskPj0o9VFD4o26dn5k36kRdkd0P64nYawd2GnEO1sQ8wS1lwkqdIQ4Q6ChWHE9Ocj1OWA//WBIfEqVdFx7gJd8qEMIiLKGb51Tz9ZxZVhoxhHDT/3H9IH/uaV/J+k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725373841; c=relaxed/simple; bh=tSu+WCZ6bGxxA/P2Jhh5qVG+oF/8xvO/COA9gAP+Mr8=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=TyeaLc+L9BAbpyzkA9I8nLjgLiOaTsV87OgZX9EdkHzy+nWhBDfkMUrrLRtHykzcE+W3anRi2B1SCwboDUPCznFjkE00OeGhwRlWssFSsf9cAmXhWItc0z97Q4ZvO4YhGf/lJs2JlPF/8qv7TUO/hmt2Kblx9xG9du57yzBSKNA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.187 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.105]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Wyp106bDyzyQws for ; Tue, 3 Sep 2024 22:29:40 +0800 (CST) Received: from kwepemd500012.china.huawei.com (unknown [7.221.188.25]) by mail.maildlp.com (Postfix) with ESMTPS id 7A2D61400CA for ; Tue, 3 Sep 2024 22:30:37 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemd500012.china.huawei.com (7.221.188.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.34; Tue, 3 Sep 2024 22:30:36 +0800 From: Li Zetao To: , , , CC: , Subject: [PATCH -next] nvdimm: Remove redundant null pointer checks Date: Tue, 3 Sep 2024 22:39:11 +0800 Message-ID: <20240903143911.2005193-1-lizetao1@huawei.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemd500012.china.huawei.com (7.221.188.25) Since the debugfs_create_dir() never returns a null pointer, checking the return value for a null pointer is redundant, and using IS_ERR is safe enough. Signed-off-by: Li Zetao Reviewed-by: Dave Jiang --- drivers/nvdimm/btt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c index 423dcd190906..4592c86d5eac 100644 --- a/drivers/nvdimm/btt.c +++ b/drivers/nvdimm/btt.c @@ -227,7 +227,7 @@ static void arena_debugfs_init(struct arena_info *a, struct dentry *parent, snprintf(dirname, 32, "arena%d", idx); d = debugfs_create_dir(dirname, parent); - if (IS_ERR_OR_NULL(d)) + if (IS_ERR(d)) return; a->debugfs_dir = d; @@ -1703,7 +1703,7 @@ static int __init nd_btt_init(void) int rc = 0; debugfs_root = debugfs_create_dir("btt", NULL); - if (IS_ERR_OR_NULL(debugfs_root)) + if (IS_ERR(debugfs_root)) rc = -ENXIO; return rc;