From mboxrd@z Thu Jan 1 00:00:00 1970 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=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 DDED0C433FE for ; Mon, 20 Sep 2021 17:39:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CAB6761B28 for ; Mon, 20 Sep 2021 17:39:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352653AbhITRkp (ORCPT ); Mon, 20 Sep 2021 13:40:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:40662 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244672AbhITRiZ (ORCPT ); Mon, 20 Sep 2021 13:38:25 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 99FF061B3A; Mon, 20 Sep 2021 17:07:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1632157631; bh=bII51P2tUfCms6tTx8mM/wUna+3XggKrf2IkC5LWlpY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hkLjjLM7l98gsx5hfmiD4tAupmhvvsSXr/fDvZcE6eRLKUU/fRygCSzYiekd6hg0O o3jkW0rm0UkQhhujF+k1IY1IGt3H4nsgi3x6yDiGpgFj4nE6mxB4ANwqQb67IcdxGC 9Uifjxe7dbUiRiqexiu/fT51JB7uS3IYGd5X2/hI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christophe JAILLET , Rob Clark , Sasha Levin Subject: [PATCH 4.19 080/293] drm/msm/dsi: Fix some reference counted resource leaks Date: Mon, 20 Sep 2021 18:40:42 +0200 Message-Id: <20210920163936.008400859@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210920163933.258815435@linuxfoundation.org> References: <20210920163933.258815435@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Christophe JAILLET [ Upstream commit 6977cc89c87506ff17e6c05f0e37f46752256e82 ] 'of_find_device_by_node()' takes a reference that must be released when not needed anymore. This is expected to be done in 'dsi_destroy()'. However, there are 2 issues in 'dsi_get_phy()'. First, if 'of_find_device_by_node()' succeeds but 'platform_get_drvdata()' returns NULL, 'msm_dsi->phy_dev' will still be NULL, and the reference won't be released in 'dsi_destroy()'. Secondly, as 'of_find_device_by_node()' already takes a reference, there is no need for an additional 'get_device()'. Move the assignment to 'msm_dsi->phy_dev' a few lines above and remove the unneeded 'get_device()' to solve both issues. Fixes: ec31abf6684e ("drm/msm/dsi: Separate PHY to another platform device") Signed-off-by: Christophe JAILLET Link: https://lore.kernel.org/r/f15bc57648a00e7c99f943903468a04639d50596.1628241097.git.christophe.jaillet@wanadoo.fr Signed-off-by: Rob Clark Signed-off-by: Sasha Levin --- drivers/gpu/drm/msm/dsi/dsi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c index ff8164cc6738..822cef472a7e 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.c +++ b/drivers/gpu/drm/msm/dsi/dsi.c @@ -34,8 +34,10 @@ static int dsi_get_phy(struct msm_dsi *msm_dsi) } phy_pdev = of_find_device_by_node(phy_node); - if (phy_pdev) + if (phy_pdev) { msm_dsi->phy = platform_get_drvdata(phy_pdev); + msm_dsi->phy_dev = &phy_pdev->dev; + } of_node_put(phy_node); @@ -44,8 +46,6 @@ static int dsi_get_phy(struct msm_dsi *msm_dsi) return -EPROBE_DEFER; } - msm_dsi->phy_dev = get_device(&phy_pdev->dev); - return 0; } -- 2.30.2