From nobody Sun Sep 22 11:39:54 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 2AAC3C433F5 for ; Fri, 17 Dec 2021 14:36:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237305AbhLQOgR (ORCPT ); Fri, 17 Dec 2021 09:36:17 -0500 Received: from smtp21.cstnet.cn ([159.226.251.21]:36072 "EHLO cstnet.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S230248AbhLQOgQ (ORCPT ); Fri, 17 Dec 2021 09:36:16 -0500 Received: from localhost.localdomain (unknown [124.16.138.126]) by APP-01 (Coremail) with SMTP id qwCowADHnKVIoLxhdjfKAw--.51920S2; Fri, 17 Dec 2021 22:35:52 +0800 (CST) From: Jiasheng Jiang To: matthias.bgg@gmail.com, lgirdwood@gmail.com, broonie@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, Jiasheng Jiang Subject: [PATCH v4] isoc: mediatek: potential use of error pointer Date: Fri, 17 Dec 2021 22:35:51 +0800 Message-Id: <20211217143551.675368-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qwCowADHnKVIoLxhdjfKAw--.51920S2 X-Coremail-Antispam: 1UD129KBjvJXoW7uw4kWryfJw15Cw4kXFWDJwb_yoW8Cry5pF 18ta4ayrWrJrW7WrWv9r4DuFy3K34IyasrK34a9w4rA3s8Jrn5JFyrZa4jyF4kAFZ7K3W3 tF4YqrWfCF1UZFUanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkv14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26F4j 6r4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY02Avz4vE14v_Xryl 42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJV WUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAK I48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F 4UMIIF0xvE42xK8VAvwI8IcIk0rVW3JVWrJr1lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAI cVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUBHqcUUUUU= X-Originating-IP: [124.16.138.126] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The return value of devm_clk_get() needs to be checked. To avoid use of error pointer in case of the failure of alloc. Fixes: 6078c651947a ("soc: mediatek: Refine scpsys to support multiple plat= form") Signed-off-by: Jiasheng Jiang --- Changelog: v3 -> v4 *Change 1. Change the "-ENOMEM" to "ERR_PTR(-ENOMEM)". *Change 2. Add the IS_ERR to check the error code from devm_clk_get(). *Change 3. Change back the "ERR_PTR(-ENOMEM)" to "-ENOMEM". --- drivers/soc/mediatek/mtk-scpsys.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-s= cpsys.c index ca75b14931ec..778d6ffc42b8 100644 --- a/drivers/soc/mediatek/mtk-scpsys.c +++ b/drivers/soc/mediatek/mtk-scpsys.c @@ -411,12 +411,16 @@ static int scpsys_power_off(struct generic_pm_domain = *genpd) return ret; } =20 -static void init_clks(struct platform_device *pdev, struct clk **clk) +static int init_clks(struct platform_device *pdev, struct clk **clk) { int i; =20 - for (i =3D CLK_NONE + 1; i < CLK_MAX; i++) + for (i =3D CLK_NONE + 1; i < CLK_MAX; i++) { clk[i] =3D devm_clk_get(&pdev->dev, clk_names[i]); + if (IS_ERR(clk[i])) + return -ENOMEM; + } + return 0; } =20 static struct scp *init_scp(struct platform_device *pdev, @@ -426,7 +430,7 @@ static struct scp *init_scp(struct platform_device *pde= v, { struct genpd_onecell_data *pd_data; struct resource *res; - int i, j; + int i, j, ret; struct scp *scp; struct clk *clk[CLK_MAX]; =20 @@ -481,7 +485,9 @@ static struct scp *init_scp(struct platform_device *pde= v, =20 pd_data->num_domains =3D num; =20 - init_clks(pdev, clk); + ret =3D init_clks(pdev, clk); + if (ret) + return ERR_PTR(-ENOMEM); =20 for (i =3D 0; i < num; i++) { struct scp_domain *scpd =3D &scp->domains[i]; --=20 2.25.1