From patchwork Tue Jul 27 07:33:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Qilong X-Patchwork-Id: 12401939 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4863C4338F for ; Tue, 27 Jul 2021 07:20:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9DCF1611C4 for ; Tue, 27 Jul 2021 07:20:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235656AbhG0HT7 (ORCPT ); Tue, 27 Jul 2021 03:19:59 -0400 Received: from szxga02-in.huawei.com ([45.249.212.188]:12411 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235558AbhG0HT6 (ORCPT ); Tue, 27 Jul 2021 03:19:58 -0400 Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4GYp4Y1vbNzchH1; Tue, 27 Jul 2021 15:16:29 +0800 (CST) Received: from dggema755-chm.china.huawei.com (10.1.198.197) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Tue, 27 Jul 2021 15:19:56 +0800 Received: from huawei.com (10.90.53.225) by dggema755-chm.china.huawei.com (10.1.198.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Tue, 27 Jul 2021 15:19:55 +0800 From: Zhang Qilong To: , CC: Subject: [PATCH -next] usb: gadget: remove leaked entry from udc driver list Date: Tue, 27 Jul 2021 15:33:47 +0800 Message-ID: <20210727073348.87069-1-zhangqilong3@huawei.com> X-Mailer: git-send-email 2.26.0.106.g9fadedd MIME-Version: 1.0 X-Originating-IP: [10.90.53.225] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggema755-chm.china.huawei.com (10.1.198.197) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The usb_add_gadget_udc will add a new gadget to the udc class driver list. Not calling usb_del_gadget_udc in error branch will result in residual gadget entry in the udc driver list. We fix it by calling usb_del_gadget_udc to clean it when error return. Fixes:48ba02b2e2b1a ("usb: gadget: add udc driver for max3420") Signed-off-by: Zhang Qilong --- drivers/usb/gadget/udc/max3420_udc.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/usb/gadget/udc/max3420_udc.c b/drivers/usb/gadget/udc/max3420_udc.c index 34f4db554977..d2a2b20cc1ad 100644 --- a/drivers/usb/gadget/udc/max3420_udc.c +++ b/drivers/usb/gadget/udc/max3420_udc.c @@ -1255,12 +1255,14 @@ static int max3420_probe(struct spi_device *spi) err = devm_request_irq(&spi->dev, irq, max3420_irq_handler, 0, "max3420", udc); if (err < 0) - return err; + goto del_gadget; udc->thread_task = kthread_create(max3420_thread, udc, "max3420-thread"); - if (IS_ERR(udc->thread_task)) - return PTR_ERR(udc->thread_task); + if (IS_ERR(udc->thread_task)) { + err = PTR_ERR(udc->thread_task); + goto del_gadget; + } irq = of_irq_get_byname(spi->dev.of_node, "vbus"); if (irq <= 0) { /* no vbus irq implies self-powered design */ @@ -1280,10 +1282,14 @@ static int max3420_probe(struct spi_device *spi) err = devm_request_irq(&spi->dev, irq, max3420_vbus_handler, 0, "vbus", udc); if (err < 0) - return err; + goto del_gadget; } return 0; + +del_gadget: + usb_del_gadget_udc(&udc->gadget); + return err; } static int max3420_remove(struct spi_device *spi)