From patchwork Wed May 23 19:07:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julia Lawall X-Patchwork-Id: 10422231 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 71E5C60224 for ; Wed, 23 May 2018 19:39:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 647342858A for ; Wed, 23 May 2018 19:39:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 595C1291C3; Wed, 23 May 2018 19:39:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E6A0B2858A for ; Wed, 23 May 2018 19:39:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C755B6E56C; Wed, 23 May 2018 19:39:05 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0A25B6E564 for ; Wed, 23 May 2018 19:39:00 +0000 (UTC) X-IronPort-AV: E=Sophos;i="5.49,434,1520895600"; d="scan'208";a="328129394" Received: from palace.lip6.fr (HELO localhost.localdomain) ([132.227.105.202]) by mail2-relais-roc.national.inria.fr with ESMTP/TLS/AES128-SHA256; 23 May 2018 21:38:58 +0200 From: Julia Lawall To: Sandy Huang Subject: [PATCH 5/5] drm/rockchip: lvds: add missing of_node_put Date: Wed, 23 May 2018 21:07:16 +0200 Message-Id: <1527102436-13447-6-git-send-email-Julia.Lawall@lip6.fr> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1527102436-13447-1-git-send-email-Julia.Lawall@lip6.fr> References: <1527102436-13447-1-git-send-email-Julia.Lawall@lip6.fr> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP The device node iterators perform an of_node_get on each iteration, so a jump out of the loop requires an of_node_put. The semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr): // @@ expression root,e; local idexpression child; iterator name for_each_child_of_node; @@ for_each_child_of_node(root, child) { ... when != of_node_put(child) when != e = child + of_node_put(child); ? break; ... } ... when != child // Signed-off-by: Julia Lawall --- drivers/gpu/drm/rockchip/rockchip_lvds.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.c b/drivers/gpu/drm/rockchip/rockchip_lvds.c index e67f4ea..051b8be 100644 --- a/drivers/gpu/drm/rockchip/rockchip_lvds.c +++ b/drivers/gpu/drm/rockchip/rockchip_lvds.c @@ -363,8 +363,10 @@ static int rockchip_lvds_bind(struct device *dev, struct device *master, of_property_read_u32(endpoint, "reg", &endpoint_id); ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id, &lvds->panel, &lvds->bridge); - if (!ret) + if (!ret) { + of_node_put(endpoint); break; + } } if (!child_count) { DRM_DEV_ERROR(dev, "lvds port does not have any children\n");