From patchwork Sun Sep 3 03:02:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13373175 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7FD45C83F2C for ; Sun, 3 Sep 2023 03:03:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=0Wv6cCvnli5zJOkWaQTSVLknlJw0SZewHrv5fhcgUw4=; b=x3a6nqFkOm7oMG ex19R/IlYz8lPaMfceneyMUESj1rw69JDMLLCGvj8Aouft60VuJRaEfu3J8AYa3ucETKG1T9yrmG/ WCCxXZU52T/9DlOMC5QPYzudnQ8E/yxcM+EuCcZlQu541Jw2DXxY2n9F/IabIqzueFPbCSMDJWzeu FDkIa/iTS4iR9aqrMx4re+rY3wfTjF23G3JgJP9pP7PSq2xdfzPxhLo+10TyjmH5rHIqQoaZknqMM jvPoEj1ZVt1yGSiZxTe90n+SDyq65a8g7h529XP6ATa83Dww+6CpJcof9gOqEuKinI6uAoqPDtd8l DDy0lf8j6wwr7VEDPgcA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qcdNw-0021Oj-29; Sun, 03 Sep 2023 03:02:48 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qcdNr-0021MK-1c; Sun, 03 Sep 2023 03:02:46 +0000 Received: from kwepemi500008.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Rdc0S3z3QztRrs; Sun, 3 Sep 2023 10:58:32 +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; Sun, 3 Sep 2023 11:02:27 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , , , , CC: Subject: [PATCH wireless-next v2 0/3] wifi: Drop unnecessary error checks for debugfs_create_dir() Date: Sun, 3 Sep 2023 11:02:13 +0800 Message-ID: <20230903030216.1509013-1-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.90.53.73] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To kwepemi500008.china.huawei.com (7.221.188.139) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230902_200243_736154_917864CB X-CRM114-Status: UNSURE ( 8.01 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org debugfs_create_dir() returns ERR_PTR and never returns NULL. As Russell suggested, this patch set removes the error checking for debugfs_create_dir(). This is because the DebugFS kernel API is developed in a way that the caller can safely ignore the errors that occur during the creation of DebugFS nodes. The debugfs APIs have a IS_ERR() judge in start_creating() which can handle it gracefully. So these checks are unnecessary. Changes in v2: - Update the subject prefix from net to wireless-next as suggested. - Remove the err check instead of using IS_ERR to replace NULL check. - Update the commit message and title. Jinjie Ruan (3): wifi: iwlwifi: mei: Drop unnecessary error check for debugfs_create_dir() mwifiex: debugfs: Drop unnecessary error check for debugfs_create_dir() wifi: mt76: Drop unnecessary error check for debugfs_create_dir() drivers/net/wireless/intel/iwlwifi/mei/main.c | 3 --- drivers/net/wireless/marvell/mwifiex/debugfs.c | 3 --- drivers/net/wireless/mediatek/mt76/debugfs.c | 2 -- 3 files changed, 8 deletions(-)