From patchwork Wed Apr 12 15:18:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabrice Gasnier X-Patchwork-Id: 13209260 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 43B3AC77B6E for ; Wed, 12 Apr 2023 15:20:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=n/40DfQDdEIhpbmVe1SD/1/TlNu4b82pczCYxRihX4s=; b=xAwjkeXkiP73ee YJd2U0qshGm+uv9nUKpborhiMSWHenfW4D6k01OBOgr1ffOC/sxei3yuKKLln6UmRmJ8jfK4l6UZi vmHHYmkVPzuUNf/+fK3c/xLn6REbkfa3EArNXIM+RgnN0NxE8YJczqpqde24P5sPaT4Ige8XugMvb yyzo4aof70FGqe09lU5XGko112hsirUrf35hXQHK3iOvwRYfMdGPUZk3AS5hNLRmcbrttO+plq0yN Qtwv63zkgMSXs/SdgItrp4UnV3AxBI+INcV/jQCqb5keV+1gf9taQj+SYJJkLcXgiI/kEGkPxV94J mjrls++V+5yrp/yeIS6g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pmcG5-003c15-20; Wed, 12 Apr 2023 15:19:41 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pmcG1-003byy-2p for linux-arm-kernel@lists.infradead.org; Wed, 12 Apr 2023 15:19:39 +0000 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 33CCNbXE002432; Wed, 12 Apr 2023 17:19:30 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=selector1; bh=FbOTl+8MNsgRED5FCS4rKIwqJQZWuMOClivGmNkcn8g=; b=twcwMM/5vdZgZt60zPG3pi6x6GATLTS66qluOA1VBnvWt6ihd2SyX9/8ze1C47q92tQO EMGMUD4oGSbdZZZqjaa1+oLEaKAJR2ogLv8lagrQB3/IGiXzex/RBK67WBBvr8i9wA+M xOlQ9qdqJaYbFqZhzQ7d4Og9GrCSqcHMbvcXnICNISmTthJyWnA4AdC0dMd57XqK2bxW WIQVIt7Ueu0fQFxhqPFqC+DxLHDWBEJNOf2bLG9P5NgGmJrKtvHPzh0PB4FHIpB7yxnO gdfko8lbmbjhUlSTno6Go65l9Eu+loQV26tp1r5tzpoPYAMQs8KLtJiDJMRu9yI59lPW 2Q== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3pws9u2nac-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Apr 2023 17:19:29 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 8BC04100039; Wed, 12 Apr 2023 17:18:41 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node2.st.com [10.75.129.70]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 849BD218612; Wed, 12 Apr 2023 17:18:41 +0200 (CEST) Received: from localhost (10.48.1.102) by SHFDAG1NODE2.st.com (10.75.129.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Wed, 12 Apr 2023 17:18:38 +0200 From: Fabrice Gasnier To: , , , , CC: , , , , , , Subject: [PATCH 1/4] usb: dwc2: improve error handling in __dwc2_lowlevel_hw_enable Date: Wed, 12 Apr 2023 17:18:28 +0200 Message-ID: <20230412151831.3069211-2-fabrice.gasnier@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230412151831.3069211-1-fabrice.gasnier@foss.st.com> References: <20230412151831.3069211-1-fabrice.gasnier@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.48.1.102] X-ClientProxiedBy: SHFCAS1NODE1.st.com (10.75.129.72) To SHFDAG1NODE2.st.com (10.75.129.70) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-12_07,2023-04-12_01,2023-02-09_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230412_081938_280614_C3D1BB07 X-CRM114-Status: GOOD ( 17.68 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add error handling in __dwc2_lowlevel_hw_enable() that may leave the clocks and regulators enabled upon error. Signed-off-by: Fabrice Gasnier --- drivers/usb/dwc2/platform.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c index d1589ba7d322..c431ce6c119f 100644 --- a/drivers/usb/dwc2/platform.c +++ b/drivers/usb/dwc2/platform.c @@ -104,7 +104,7 @@ static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg) if (hsotg->clk) { ret = clk_prepare_enable(hsotg->clk); if (ret) - return ret; + goto err_dis_reg; } if (hsotg->uphy) { @@ -113,10 +113,25 @@ static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg) ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type); } else { ret = phy_init(hsotg->phy); - if (ret == 0) + if (ret == 0) { ret = phy_power_on(hsotg->phy); + if (ret) + phy_exit(hsotg->phy); + } } + if (ret) + goto err_dis_clk; + + return 0; + +err_dis_clk: + if (hsotg->clk) + clk_disable_unprepare(hsotg->clk); + +err_dis_reg: + regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies); + return ret; }