From patchwork Mon Dec 20 08:38:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiasheng Jiang X-Patchwork-Id: 526227 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 BD089C433EF for ; Mon, 20 Dec 2021 08:38:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237952AbhLTIid (ORCPT ); Mon, 20 Dec 2021 03:38:33 -0500 Received: from smtp23.cstnet.cn ([159.226.251.23]:35540 "EHLO cstnet.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S237925AbhLTIic (ORCPT ); Mon, 20 Dec 2021 03:38:32 -0500 Received: from localhost.localdomain (unknown [124.16.138.126]) by APP-03 (Coremail) with SMTP id rQCowAA3UJL0QMBhfh7vAw--.59045S2; Mon, 20 Dec 2021 16:38:12 +0800 (CST) From: Jiasheng Jiang To: sean.wang@mediatek.com, sre@kernel.org, matthias.bgg@gmail.com Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, Jiasheng Jiang Subject: [PATCH] rtc: mt6397: Check for null res pointer Date: Mon, 20 Dec 2021 16:38:11 +0800 Message-Id: <20211220083811.907261-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: rQCowAA3UJL0QMBhfh7vAw--.59045S2 X-Coremail-Antispam: 1UD129KBjvdXoW7JFyDuFW3uF4fWr1Duw1fXrb_yoWfAFc_X3 y2934xAF93GF12kFsrAFn3ZFWIkF9xuFs3Xr4rtFWak345Xw1Dta4jgr97Gr17Xw1UZFWD GasFvr43AFyfAjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbcAFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_ Gr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkIecxEwVAFwVW8ZwCF 04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r 18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vI r41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr 1lIxAIcVCF04k26cxKx2IYs7xG6rWUJVWrZr1UMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF 0xvEx4A2jsIEc7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvjfU8Z2-UUUUU X-Originating-IP: [124.16.138.126] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The return value of platform_get_resource() needs to be checked. To avoid use of error pointer in case that there is no suitable resource. Fixes: d28c74c10751 ("power: reset: add driver for mt6323 poweroff") Signed-off-by: Jiasheng Jiang --- drivers/power/reset/mt6323-poweroff.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/power/reset/mt6323-poweroff.c b/drivers/power/reset/mt6323-poweroff.c index 0532803e6cbc..d90e76fcb938 100644 --- a/drivers/power/reset/mt6323-poweroff.c +++ b/drivers/power/reset/mt6323-poweroff.c @@ -57,6 +57,9 @@ static int mt6323_pwrc_probe(struct platform_device *pdev) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; + pwrc->base = res->start; pwrc->regmap = mt6397_chip->regmap; pwrc->dev = &pdev->dev;