From nobody Sun Sep 22 02:40:20 2024 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61750C433EF for ; Thu, 16 Jun 2022 05:42:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358727AbiFPFmw (ORCPT ); Thu, 16 Jun 2022 01:42:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35468 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1358699AbiFPFms (ORCPT ); Thu, 16 Jun 2022 01:42:48 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C1C3622BD1 for ; Wed, 15 Jun 2022 22:42:47 -0700 (PDT) X-UUID: 62c4fc8db1ca4f139ce513466600e9dd-20220616 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.6,REQID:1f969065-5408-4276-9caf-bbcce550025a,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACT ION:release,TS:-5 X-CID-META: VersionHash:b14ad71,CLOUDID:508f6ff6-e099-41ba-a32c-13b8bfe63214,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: 62c4fc8db1ca4f139ce513466600e9dd-20220616 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 330060221; Thu, 16 Jun 2022 13:42:42 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Thu, 16 Jun 2022 13:42:40 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 16 Jun 2022 13:42:39 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Will Deacon CC: , , , , Yong Wu , AngeloGioacchino Del Regno , , , , , , , , Guenter Roeck , Dan Carpenter Subject: [PATCH v2 2/5] iommu/mediatek: Add error path for loop of mm_dts_parse Date: Thu, 16 Jun 2022 13:42:00 +0800 Message-ID: <20220616054203.11365-3-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220616054203.11365-1-yong.wu@mediatek.com> References: <20220616054203.11365-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The mtk_iommu_mm_dts_parse will parse the smi larbs nodes. if the i+1 larb is parsed fail(return -EINVAL), we should of_node_put for the 0..i larbs. In the fail path, one of_node_put matches with of_parse_phandle in it. Fixes: d2e9a1102cfc ("iommu/mediatek: Contain MM IOMMU flow with the MM TYP= E") Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 3b2489e8a6dd..ab24078938bf 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -1071,12 +1071,12 @@ static int mtk_iommu_mm_dts_parse(struct device *de= v, struct component_match **m =20 plarbdev =3D of_find_device_by_node(larbnode); if (!plarbdev) { - of_node_put(larbnode); - return -ENODEV; + ret =3D -ENODEV; + goto err_larbnode_put; } if (!plarbdev->dev.driver) { - of_node_put(larbnode); - return -EPROBE_DEFER; + ret =3D -EPROBE_DEFER; + goto err_larbnode_put; } data->larb_imu[id].dev =3D &plarbdev->dev; =20 @@ -1107,9 +1107,20 @@ static int mtk_iommu_mm_dts_parse(struct device *dev= , struct component_match **m DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME); if (!link) { dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev)); - return -EINVAL; + ret =3D -EINVAL; + goto err_larbnode_put; } return 0; + +err_larbnode_put: + while (i--) { + larbnode =3D of_parse_phandle(dev->of_node, "mediatek,larbs", i); + if (larbnode && of_device_is_available(larbnode)) { + of_node_put(larbnode); + of_node_put(larbnode); + } + } + return ret; } =20 static int mtk_iommu_probe(struct platform_device *pdev) --=20 2.18.0