From patchwork Thu Sep 14 03:31:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 722905 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0C165EE021F for ; Thu, 14 Sep 2023 03:32:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234139AbjINDca (ORCPT ); Wed, 13 Sep 2023 23:32:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229876AbjINDc3 (ORCPT ); Wed, 13 Sep 2023 23:32:29 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A9091BE4 for ; Wed, 13 Sep 2023 20:32:25 -0700 (PDT) Received: from kwepemi500008.china.huawei.com (unknown [172.30.72.56]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4RmN9B73nlzVkVq; Thu, 14 Sep 2023 11:29:34 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemi500008.china.huawei.com (7.221.188.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Thu, 14 Sep 2023 11:32:23 +0800 From: Jinjie Ruan To: , , , , Eddie James , Mauro Carvalho Chehab , Joel Stanley , Andrew Jeffery , Hans Verkuil , Jammy Huang CC: Subject: [PATCH] media: aspeed: Fix the NULL vs IS_ERR() bug for debugfs_create_file() Date: Thu, 14 Sep 2023 11:31:35 +0800 Message-ID: <20230914033135.3760727-1-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.90.53.73] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemi500008.china.huawei.com (7.221.188.139) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Since debugfs_create_file() returns ERR_PTR and never NULL, use IS_ERR() to check the return value. And so return the err code based on IS_ERR instead of checking NULL. Fixes: 52fed10ad756 ("media: aspeed: add debugfs") Signed-off-by: Jinjie Ruan --- drivers/media/platform/aspeed/aspeed-video.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/aspeed/aspeed-video.c b/drivers/media/platform/aspeed/aspeed-video.c index a9c2c69b2ed9..f4e624c13d3b 100644 --- a/drivers/media/platform/aspeed/aspeed-video.c +++ b/drivers/media/platform/aspeed/aspeed-video.c @@ -1975,10 +1975,12 @@ static int aspeed_video_debugfs_create(struct aspeed_video *video) debugfs_entry = debugfs_create_file(DEVICE_NAME, 0444, NULL, video, &aspeed_video_debugfs_fops); - if (!debugfs_entry) + if (IS_ERR(debugfs_entry)) { aspeed_video_debugfs_remove(video); + return -EIO; + } - return !debugfs_entry ? -EIO : 0; + return 0; } #else static void aspeed_video_debugfs_remove(struct aspeed_video *video) { }