From patchwork Sun Sep 3 03:02:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13373173 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 30953C88CB2 for ; Sun, 3 Sep 2023 03:02:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: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:List-Owner; bh=6cM4IStufA0BLNJ/UhR94eCNXVQgunVRIYKEJ0giS/g=; b=grfzHSWypZ7f1f3qD90y7SEB2H E0ZDRB9b4wSvY3pKfYC/gjqK037jJOANMaV/UjHoinZ1EwE5dGkUoc/+7zn93j7hzNmnkbMUZS4vm Paw8bTobLY1r054x8nEvMplG1GUVaQoVN1QBeSY+paUkd5hsmTYRMCq3bSvwgV8ndQ/vNFXHCst4Q CoiX9qM1SLOsNRKsWv1cklJdNLonK01wdpNa2ftVoESJpeITU5EXTn10IXWgpQ8Wz1f/wjExalqNI RNOPIND5EqmGfll6ZD0c4+LaRwch+rzdWhUaA6zFDgGrLFpJjZ3gxfi2A+3p0qz3VY/wHrRfzk6Vq dLl1qsDg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qcdNy-0021Q0-0O; Sun, 03 Sep 2023 03:02:50 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qcdNt-0021N1-2Y; Sun, 03 Sep 2023 03:02:47 +0000 Received: from kwepemi500008.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Rdc0y55tHzNmWG; Sun, 3 Sep 2023 10:58:58 +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 11:02:36 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , , , , CC: Subject: [PATCH wireless-next v2 3/3] wifi: mt76: Drop unnecessary error check for debugfs_create_dir() Date: Sun, 3 Sep 2023 11:02:16 +0800 Message-ID: <20230903030216.1509013-4-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230903030216.1509013-1-ruanjinjie@huawei.com> References: <20230903030216.1509013-1-ruanjinjie@huawei.com> 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_200246_022890_5F7D2433 X-CRM114-Status: UNSURE ( 9.28 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org debugfs_create_dir() returns ERR_PTR and never return NULL. As Russell suggested, this patch 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. Fixes: 17f1de56df05 ("mt76: add common code shared between multiple chipsets") Signed-off-by: Jinjie Ruan Suggested-by: Russell King (Oracle) --- v2: - Remove the err check instead of using IS_ERR to replace NULL check. - Update the commit message and title. --- drivers/net/wireless/mediatek/mt76/debugfs.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/debugfs.c b/drivers/net/wireless/mediatek/mt76/debugfs.c index 57fbcc83e074..ae83be572b94 100644 --- a/drivers/net/wireless/mediatek/mt76/debugfs.c +++ b/drivers/net/wireless/mediatek/mt76/debugfs.c @@ -109,8 +109,6 @@ mt76_register_debugfs_fops(struct mt76_phy *phy, struct dentry *dir; dir = debugfs_create_dir("mt76", phy->hw->wiphy->debugfsdir); - if (!dir) - return NULL; debugfs_create_u8("led_pin", 0600, dir, &phy->leds.pin); debugfs_create_u32("regidx", 0600, dir, &dev->debugfs_reg);