From patchwork Mon Dec 20 13:42:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiasheng Jiang X-Patchwork-Id: 12687923 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 36930C433F5 for ; Mon, 20 Dec 2021 13:43:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233013AbhLTNnH (ORCPT ); Mon, 20 Dec 2021 08:43:07 -0500 Received: from smtp21.cstnet.cn ([159.226.251.21]:36982 "EHLO cstnet.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229539AbhLTNnH (ORCPT ); Mon, 20 Dec 2021 08:43:07 -0500 Received: from localhost.localdomain (unknown [124.16.138.126]) by APP-01 (Coremail) with SMTP id qwCowACnrZ1ViMBh4K1uBA--.25001S2; Mon, 20 Dec 2021 21:42:45 +0800 (CST) From: Jiasheng Jiang To: ok@artecdesign.ee, gregkh@linuxfoundation.org, s.shtylyov@omp.ru Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Jiasheng Jiang Subject: [PATCH v3] USB: host: Check for null res pointer Date: Mon, 20 Dec 2021 21:42:44 +0800 Message-Id: <20211220134244.930727-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: qwCowACnrZ1ViMBh4K1uBA--.25001S2 X-Coremail-Antispam: 1UD129KBjvdXoW7JFyDuFWfCr1DXrW7uF1kAFb_yoWkXFX_Cr 409395KryDCFn0ya18Arnxua92ywsxur4UZa1kta4avryUJr17J3yDurWfCr98Ww4DCryD C34kZrZ3u343ZjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbcxFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s 1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0 cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r4j6F4UMcvjeVCFs4IE7xkEbVWUJVW8Jw ACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lc2xSY4AK67AK6ry8MxAI w28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr 4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUAVWUtwCIc40Y0x0EwIxG rwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVWUJVW8Jw CI42IY6xAIw20EY4v20xvaj40_WFyUJVCq3wCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY 6I8E87Iv6xkF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7VUU3CzJUUUUU== X-Originating-IP: [124.16.138.126] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ Precedence: bulk List-ID: X-Mailing-List: linux-usb@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: 4808a1c02611 ("[PATCH] USB: Add isp116x-hcd USB host controller driver") Signed-off-by: Jiasheng Jiang --- Changelog: v2 -> v3 *Change 1. Correct the commit message. *CHange 2. Change the return code. --- drivers/usb/host/isp116x-hcd.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c index 8835f6bd528e..addd2b43a14c 100644 --- a/drivers/usb/host/isp116x-hcd.c +++ b/drivers/usb/host/isp116x-hcd.c @@ -1541,9 +1541,15 @@ static int isp116x_remove(struct platform_device *pdev) iounmap(isp116x->data_reg); res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) + return -ENODEV; + release_mem_region(res->start, 2); iounmap(isp116x->addr_reg); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + release_mem_region(res->start, 2); usb_put_hcd(hcd);