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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0DF00C43334 for ; Thu, 16 Jun 2022 13:53:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=vMYX8vVEMVSTBnRO4T8a2iTEzySbI9JJmfib14Jv9h0=; b=Pl4KEGh7qwvTXAbeelvvxAUKN+ dGSVAcWHajPrvrn1EJTCURfFH/F6dNpu7JuNmVFEe12WafmH58k0CrZ2DUsnZr+Ed3kTWzfE3iRrL Y0BMXSbbJbXSJfBzVS+qPdUNHQZuCRiybkB2zKU1UnObwe63haOye69xVm9gk3lNcjKeMIFxEp5wh Az3b5w+stxjyTh10SHE0vUzq0miUN7kYgDG83ZwMvV1sJeBp0/z6COnZ3n+GACeDvrDpM7jPiEF1b v3FOW41flb/mbK1mGOgO0fofNe/vE1UgxZFpAGGQVYNFEam/mdGiYkth4ctMHJzmP5GX/tTzma75E 2fgxh8Bg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o1pwO-002cIh-Pg; Thu, 16 Jun 2022 13:53:44 +0000 Received: from mail-wr1-x436.google.com ([2a00:1450:4864:20::436]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o1psb-002a3e-Bi; Thu, 16 Jun 2022 13:49:50 +0000 Received: by mail-wr1-x436.google.com with SMTP id a15so1982126wrh.2; Thu, 16 Jun 2022 06:49:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=vMYX8vVEMVSTBnRO4T8a2iTEzySbI9JJmfib14Jv9h0=; b=oHZ/WlVy8bLQzX5XPSluY6fi8t4wrJHCh2DNNHWAK5yiyH5xZ9COwCQrs9ZfP+6ptJ 93ySFOJe9wfCGwWXgHnar7m/6aGDnD0S1O+HxPC6xSk+cexyKjWkbP7CtFeceQJSn23R v1G63z1Dcox5wBclBjv9DRSavVbCjhO7hmFUmwX86Rnry/7oE4lazYOsHA8QrlPHgztj uR4PVch1A9250cKszi6i7e8YGVJtaKtiXz8JGxthLI1rLdfhbPsSKvbHGV5eoaEnr6rT Du4Tomd7n70SIuNSI7H8BbB7wi5Tzqpa8naYoVpfCcP1QttROIseu+D9zm/KshxSL+jU h+NA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=vMYX8vVEMVSTBnRO4T8a2iTEzySbI9JJmfib14Jv9h0=; b=CdWhIq1Th+itnrpMKmK7Wq+cXsvOOoaHZwyjMCVHQLuGTx2biqNAq3mT/ooGI3SaAI YP+BZtew36IyXfYy2Z1PJJhdUIOkHOorwWOoVjf1NCmZFVhsm3DmV1D6Yh0szoUjdKl9 trWs8QaZtGduJ2JnDoSH/o8SMkXytIiW9TrKta5kCKhbw6sQanI+j8fAPB4G1AlOadXX WIN44kwm8YrY7thlPyLNbwSN3087aTadEkASYl6Y9znvX/LeivevEkO3ZY/pJadeNGjv S7Y5aUP9UbPPnUQFcXb6prV3LAv81f7TdpJKTaYRARfbJCd2yKFq5klSY2LyV+HE/QeA 7OxQ== X-Gm-Message-State: AJIora/J7VDl4GSkdqfikY5gy0Tp0PzReyzwW4qZOWQupnSKH6q4YNPT CA+mGKCg7I71dC6md0jc/nA= X-Google-Smtp-Source: AGRyM1s9twy4XfOTRNf07Dn5/dC+PXKASOKIAn/okFRK8bJikDResr8hjVSbZIf2IlwH1J8fURxW2Q== X-Received: by 2002:a05:6000:170e:b0:218:3fe0:7c72 with SMTP id n14-20020a056000170e00b002183fe07c72mr4971478wrc.572.1655387386601; Thu, 16 Jun 2022 06:49:46 -0700 (PDT) Received: from [192.168.1.145] ([207.188.167.132]) by smtp.gmail.com with ESMTPSA id g16-20020a05600c4ed000b0039c5497deccsm13646132wmq.1.2022.06.16.06.49.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Jun 2022 06:49:45 -0700 (PDT) Message-ID: <22c40a7f-d759-5b4a-f554-cf679102d91f@gmail.com> Date: Thu, 16 Jun 2022 15:49:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [PATCH v2 2/5] iommu/mediatek: Add error path for loop of mm_dts_parse Content-Language: en-US To: Yong Wu , Joerg Roedel , Will Deacon Cc: iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, AngeloGioacchino Del Regno , mingyuan.ma@mediatek.com, yf.wang@mediatek.com, libo.kang@mediatek.com, chengci.xu@mediatek.com, youlin.pei@mediatek.com, anan.sun@mediatek.com, xueqi.zhang@mediatek.com, Guenter Roeck , Dan Carpenter References: <20220616054203.11365-1-yong.wu@mediatek.com> <20220616054203.11365-3-yong.wu@mediatek.com> From: Matthias Brugger In-Reply-To: <20220616054203.11365-3-yong.wu@mediatek.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220616_064949_453514_B127A37B X-CRM114-Status: GOOD ( 21.20 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 16/06/2022 07:42, Yong Wu wrote: > 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 TYPE") > 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 *dev, struct component_match **m > Don't we need to call the goto also on error case of: larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i); Regards, Matthias > plarbdev = of_find_device_by_node(larbnode); > if (!plarbdev) { > - of_node_put(larbnode); > - return -ENODEV; > + ret = -ENODEV; > + goto err_larbnode_put; > } > if (!plarbdev->dev.driver) { > - of_node_put(larbnode); > - return -EPROBE_DEFER; > + ret = -EPROBE_DEFER; > + goto err_larbnode_put; > } > data->larb_imu[id].dev = &plarbdev->dev; > > @@ -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 = -EINVAL; > + goto err_larbnode_put; > } > return 0; > + > +err_larbnode_put: > + while (i--) { > + larbnode = 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; > } > > static int mtk_iommu_probe(struct platform_device *pdev)