From patchwork Fri Jul 9 20:07:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julia Lawall X-Patchwork-Id: 12367953 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14212C07E99 for ; Fri, 9 Jul 2021 20:22:33 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BD11B613AB for ; Fri, 9 Jul 2021 20:22:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BD11B613AB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=inria.fr Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1F07C6EA85; Fri, 9 Jul 2021 20:22:30 +0000 (UTC) X-Greylist: delayed 430 seconds by postgrey-1.36 at gabe; Fri, 09 Jul 2021 20:22:28 UTC Received: from mail3-relais-sop.national.inria.fr (mail3-relais-sop.national.inria.fr [192.134.164.104]) by gabe.freedesktop.org (Postfix) with ESMTPS id 410306EA85 for ; Fri, 9 Jul 2021 20:22:28 +0000 (UTC) IronPort-HdrOrdr: A9a23:8+oOA60Yl+PvqM5LTFr2bgqjBKskLtp133Aq2lEZdPWaSKGlfqeV7ZcmPHDP5wr5NEtKpTniAsm9qA3nm6KdiLN5VYtKNzOLhILHFutfBPPZogHdJw== X-IronPort-AV: E=Sophos;i="5.84,227,1620684000"; d="scan'208";a="387621753" Received: from palace.rsr.lip6.fr (HELO palace.lip6.fr) ([132.227.105.202]) by mail3-relais-sop.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-SHA; 09 Jul 2021 22:15:15 +0200 From: Julia Lawall To: Maarten Lankhorst Subject: [PATCH] drm/of: free the right object Date: Fri, 9 Jul 2021 22:07:17 +0200 Message-Id: <20210709200717.3676376-1-Julia.Lawall@inria.fr> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Zimmermann , David Airlie , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" There is no need to free a NULL value. Instead, free the object that is leaking due to the iterator. The semantic patch that finds this problem is as follows: // @@ expression x,e; identifier f; @@ x = f(...); if (x == NULL) { ... when any when != x = e * of_node_put(x); ... } // Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order") Signed-off-by: Julia Lawall --- drivers/gpu/drm/drm_of.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index ca04c34e8251..197c57477344 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -315,7 +315,7 @@ static int drm_of_lvds_get_remote_pixels_type( remote_port = of_graph_get_remote_port(endpoint); if (!remote_port) { - of_node_put(remote_port); + of_node_put(endpoint); return -EPIPE; }