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=-12.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY autolearn=ham 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 9C493C10F0E for ; Tue, 9 Apr 2019 05:16:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 74C9120883 for ; Tue, 9 Apr 2019 05:16:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727112AbfDIFQl (ORCPT ); Tue, 9 Apr 2019 01:16:41 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:4407 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725550AbfDIFQl (ORCPT ); Tue, 9 Apr 2019 01:16:41 -0400 X-UUID: aa2acfe69a0041efb731e51f630df759-20190409 X-UUID: aa2acfe69a0041efb731e51f630df759-20190409 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 872247550; Tue, 09 Apr 2019 13:16:07 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs02n2.mediatek.inc (172.21.101.101) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 9 Apr 2019 13:15:59 +0800 Received: from [172.21.77.4] (172.21.77.4) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 9 Apr 2019 13:15:59 +0800 Message-ID: <1554786959.336.1.camel@mtksdaap41> Subject: Re: [PATCH 1/7] drm/mediatek: fix possible object reference leak From: CK Hu To: Wen Yang CC: , , Philipp Zabel , David Airlie , Daniel Vetter , Matthias Brugger , , , Date: Tue, 9 Apr 2019 13:15:59 +0800 In-Reply-To: <1554307455-40361-2-git-send-email-wen.yang99@zte.com.cn> References: <1554307455-40361-1-git-send-email-wen.yang99@zte.com.cn> <1554307455-40361-2-git-send-email-wen.yang99@zte.com.cn> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-TM-SNTS-SMTP: 6C3628861AC26213B58C9F255F10F5CB456356F772F5AF5FB2C22EA78C8C0EF12000:8 X-MTK: N Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Wen: On Thu, 2019-04-04 at 00:04 +0800, Wen Yang wrote: > The call to of_parse_phandle returns a node pointer with refcount > incremented thus it must be explicitly decremented after the last > usage. > > Detected by coccinelle with the following warnings: > drivers/gpu/drm/mediatek/mtk_hdmi.c:1521:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1509, but without a corresponding object release within this function. > drivers/gpu/drm/mediatek/mtk_hdmi.c:1524:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1509, but without a corresponding object release within this function. For this patch, applied to mediatek-drm-fixes-5.1 [1], thanks. [1] https://github.com/ckhu-mediatek/linux.git-tags/commits/mediatek-drm-fixes-5.1 Regards, CK > > Signed-off-by: Wen Yang > Cc: CK Hu > Cc: Philipp Zabel > Cc: David Airlie > Cc: Daniel Vetter > Cc: Matthias Brugger > Cc: dri-devel@lists.freedesktop.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-mediatek@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > --- > drivers/gpu/drm/mediatek/mtk_hdmi.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c > index 915cc84..ed10f4d 100644 > --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c > +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c > @@ -1516,6 +1516,7 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, > of_node_put(remote); > > hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np); > + of_node_put(i2c_np); > if (!hdmi->ddc_adpt) { > dev_err(dev, "Failed to get ddc i2c adapter by node\n"); > return -EINVAL;