From patchwork Fri Aug 23 09:20:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13774835 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 7D501C531DC for ; Fri, 23 Aug 2024 09:18:40 +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=HSIQmh5f8NMDB990nC35qBmXxXCeB9LTlbWii/6DVdI=; b=je0k9qqSewaaaazot84QMep9vI zlsxfp2WlDSsXjbrKYRaL7gg7qhNryUT6HAL2Zcepe5QciR3tIUoM/1F/1BEfgNcCTpyoHtqyikYI H5ffOMNG4pDeiSz4UvewOVpr7e8hOYyin5YS6V+/xZwVfWjvuQHijezP3eqVAx1FsqHe3FWTe8zq5 Iemh0wVF+/q4CvJiWlZBnkST/InTx59ffLJz0lZ7p7nUGOybtkzvlUFuCmSTFgN+mCJIckAi++G5j +2UR9J7CVbOP6CzdDKVvU8j4GXRlC+2f/ivoY+llq6s1ulBMmARxq9o4MOAgthOam29JQz2xucGUx 7kBHU5WA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1shQR9-0000000G4P9-3DUF; Fri, 23 Aug 2024 09:18:27 +0000 Received: from szxga05-in.huawei.com ([45.249.212.191]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1shQMJ-0000000G33E-25lI; Fri, 23 Aug 2024 09:13:30 +0000 Received: from mail.maildlp.com (unknown [172.19.163.44]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4WqvVz08Fbz1j6rK; Fri, 23 Aug 2024 17:13:15 +0800 (CST) Received: from kwepemh500013.china.huawei.com (unknown [7.202.181.146]) by mail.maildlp.com (Postfix) with ESMTPS id 9A1921402C7; Fri, 23 Aug 2024 17:13:19 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemh500013.china.huawei.com (7.202.181.146) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Fri, 23 Aug 2024 17:13:18 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , CC: Subject: [PATCH -next 2/5] drm/mediatek: Fix missing of_node_put() for mtk_drm_get_all_drm_priv() Date: Fri, 23 Aug 2024 17:20:50 +0800 Message-ID: <20240823092053.3170445-3-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240823092053.3170445-1-ruanjinjie@huawei.com> References: <20240823092053.3170445-1-ruanjinjie@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.90.53.73] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemh500013.china.huawei.com (7.202.181.146) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240823_021327_872975_B32B009B X-CRM114-Status: GOOD ( 11.48 ) 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 In mtk_drm_get_all_drm_priv(), break in for_each_child_of_node() should call of_node_put() to avoid child node resource leak, use for_each_child_of_node_scoped() to fix it. And avoid the need for manual cleanup of_node_put() in early exits from the loop for another one. Fixes: d761b9450e31 ("drm/mediatek: Add cnt checking for coverity issue") Signed-off-by: Jinjie Ruan --- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index 77b50c56c124..41aff0183cbd 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -371,12 +371,11 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev) struct mtk_drm_private *temp_drm_priv; struct device_node *phandle = dev->parent->of_node; const struct of_device_id *of_id; - struct device_node *node; struct device *drm_dev; unsigned int cnt = 0; int i, j; - for_each_child_of_node(phandle->parent, node) { + for_each_child_of_node_scoped(phandle->parent, node) { struct platform_device *pdev; of_id = of_match_node(mtk_drm_of_ids, node); @@ -828,7 +827,6 @@ static int mtk_drm_probe(struct platform_device *pdev) struct device_node *phandle = dev->parent->of_node; const struct of_device_id *of_id; struct mtk_drm_private *private; - struct device_node *node; struct component_match *match = NULL; struct platform_device *ovl_adaptor; int ret; @@ -869,7 +867,7 @@ static int mtk_drm_probe(struct platform_device *pdev) } /* Iterate over sibling DISP function blocks */ - for_each_child_of_node(phandle->parent, node) { + for_each_child_of_node_scoped(phandle->parent, node) { const struct of_device_id *of_id; enum mtk_ddp_comp_type comp_type; int comp_id; @@ -933,10 +931,8 @@ static int mtk_drm_probe(struct platform_device *pdev) } ret = mtk_ddp_comp_init(node, &private->ddp_comp[comp_id], comp_id); - if (ret) { - of_node_put(node); + if (ret) goto err_node; - } } if (!private->mutex_node) {