From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1576794-1517682047-2-12719182308148569309 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='com', MailFrom='org', XOriginatingCountry='US' X-Spam-charsets: plain='iso-8859-1' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1517682047; b=KEQpLG5/qfnapmbVMNUih5qyDqX2FybjpmZUT8EUsNxuTZC YBGJ6q8qnmxKEYBPk09O5wzcV5+dax15xLeMGvWri1I86SoiK1iLipcw9KoaDrJ5 O0vJI4BO2asA2XgNfKFT+LF5P6T6KQmlCu/K0kk1IjQqOS6hsCbAilCTWxQLsHma sPvxbQVWMdhxoFqhZ4ZHAVRUAqjvOeKChjbbMmKYyUibNPNreR8Vr0zeuC6PCbu7 BzDUZFUC4dCieibL/p1p+3WklGUHFzxuxxJ4Pja1lWJFUpkE7YNJRkw7r1/EWDDn 9pDrSrNdbNJB+vIvHTHnAlYbf9pl6s7U/W9Nh9w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :references:in-reply-to:content-type:content-transfer-encoding :mime-version:sender:list-id; s=arctest; t=1517682047; bh=3c/T/k C/qQpggE3UBsVa48mHgLlo+uyzIfadiq/I22o=; b=VOTcx2qRf37aEcD8lYZ+A0 h2OCsVMTGGqR9850IlRkghEF4K/hExe3ht2zXhJw2AjcTI8uF3Dt0CZcdhxWht2m M7xg5DzfQhlFnhkDaKbKQdjzAD70PzSHRmIie+wwapWesWVWUhbFjgSHDTTiX8jM FK8o8v1yMY08J7SsKlLwDZ25QWAMeUiyfg1xs1nG7aJDhI0qSkMsUv72ewB5eDQG cFLrdG8dYDziDcXfRsR9MvUOGAXODKOwYKOluRcLH/aBNGfbBzmAqp5q9GSbroXW z5KwOmUBzE51oLiIak3Ms1vkDBANLdojgEFwZmywdrfDD4dVPRg2T/pAXjJOwOQQ == ARC-Authentication-Results: i=1; mx1.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=microsoft.com header.i=@microsoft.com header.b=Fk1yI3qB x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=selector1; dmarc=pass (p=reject,has-list-id=yes,d=none) header.from=microsoft.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Authentication-Results: mx1.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=microsoft.com header.i=@microsoft.com header.b=Fk1yI3qB x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=selector1; dmarc=pass (p=reject,has-list-id=yes,d=none) header.from=microsoft.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753933AbeBCSUn (ORCPT ); Sat, 3 Feb 2018 13:20:43 -0500 Received: from mail-by2nam03on0129.outbound.protection.outlook.com ([104.47.42.129]:52828 "EHLO NAM03-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753463AbeBCSGc (ORCPT ); Sat, 3 Feb 2018 13:06:32 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Radu Pirea , Mark Brown , Sasha Levin Subject: [PATCH AUTOSEL for 4.4 07/32] spi: atmel: fixed spin_lock usage inside atmel_spi_remove Thread-Topic: [PATCH AUTOSEL for 4.4 07/32] spi: atmel: fixed spin_lock usage inside atmel_spi_remove Thread-Index: AQHTnRlu+B2/CzqF60OLi7Q7N/kn/w== Date: Sat, 3 Feb 2018 18:04:27 +0000 Message-ID: <20180203180413.7438-7-alexander.levin@microsoft.com> References: <20180203180413.7438-1-alexander.levin@microsoft.com> In-Reply-To: <20180203180413.7438-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;BL0PR2101MB1089;7:d/6LUfy9BqQbOXigfPllhRd4aHjO0QQZONmBwqyq/2X67HSUrano+N/Guql5QWpE4QH7lqtzxB26Xg11Z0qvBuLC23/vog5kiOVjugVtnMsbiVcB64SarFYRQWu4Q6ot1WpPEvCqq5lkgdb9h7q395+VZoazUjbrRY5FxbN02kms6b78jZvdvIafeR21/RCMycRvWTGWrY1QGTBzZMi0NxIRMDKa+quLrduTP7SlqvaqHL2d11Y/qED026Pxfesm x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 2eb0735d-0b6a-4716-3a78-08d56b30a6da x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(4534165)(4627221)(201703031133081)(201702281549075)(5600026)(4604075)(3008032)(2017052603307)(7193020);SRVR:BL0PR2101MB1089; x-ms-traffictypediagnostic: BL0PR2101MB1089: x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171)(85827821059158)(17755550239193); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(61425038)(6040501)(2401047)(5005006)(8121501046)(3002001)(10201501046)(3231101)(2400082)(944501161)(93006095)(93001095)(6055026)(61426038)(61427038)(6041288)(20161123562045)(20161123560045)(20161123558120)(20161123564045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(6072148)(201708071742011);SRVR:BL0PR2101MB1089;BCL:0;PCL:0;RULEID:;SRVR:BL0PR2101MB1089; x-forefront-prvs: 05724A8921 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(39380400002)(396003)(39860400002)(376002)(366004)(346002)(199004)(189003)(86362001)(106356001)(22452003)(4326008)(97736004)(25786009)(6666003)(2950100002)(5660300001)(2906002)(81156014)(105586002)(3280700002)(8676002)(8936002)(6116002)(68736007)(81166006)(3660700001)(86612001)(2900100001)(107886003)(3846002)(1076002)(102836004)(26005)(6346003)(66066001)(10090500001)(76176011)(6506007)(10290500003)(186003)(6486002)(14454004)(59450400001)(6436002)(53936002)(72206003)(316002)(305945005)(7736002)(99286004)(54906003)(110136005)(36756003)(2501003)(5250100002)(6512007)(478600001)(22906009)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:BL0PR2101MB1089;H:BL0PR2101MB1027.namprd21.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;A:1;MX:1;LANG:en; authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: pFsgrqfckM8pKGhASWzxb3dRasJpoSzEhEMQnZz9+YMPtOruZuMaey9KeUwuw/lcdvQhXwmMXEnaZiURmXTwww== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2eb0735d-0b6a-4716-3a78-08d56b30a6da X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Feb 2018 18:04:27.5808 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR2101MB1089 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Radu Pirea [ Upstream commit 66e900a3d225575c8b48b59ae1fe74bb6e5a65cc ] The only part of atmel_spi_remove which needs to be atomic is hardware reset. atmel_spi_stop_dma calls dma_terminate_all and this needs interrupts enabled. atmel_spi_release_dma calls dma_release_channel and dma_release_channel locks a mutex inside of spin_lock. So the call of these functions can't be inside a spin_lock. Reported-by: Jia-Ju Bai Signed-off-by: Radu Pirea Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-atmel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index 8feac599e9ab..44be6b593b30 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -1669,12 +1669,12 @@ static int atmel_spi_remove(struct platform_device = *pdev) pm_runtime_get_sync(&pdev->dev); =20 /* reset the hardware and block queue progress */ - spin_lock_irq(&as->lock); if (as->use_dma) { atmel_spi_stop_dma(as); atmel_spi_release_dma(as); } =20 + spin_lock_irq(&as->lock); spi_writel(as, CR, SPI_BIT(SWRST)); spi_writel(as, CR, SPI_BIT(SWRST)); /* AT91SAM9263 Rev B workaround */ spi_readl(as, SR); --=20 2.11.0