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Mon, 13 Dec 2021 13:20:25 +0100 Received: from gli-login.cadence.com (10.187.128.100) by maileu3.global.cadence.com (10.160.88.99) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Mon, 13 Dec 2021 13:20:25 +0100 Received: from gli-login.cadence.com (localhost [127.0.0.1]) by gli-login.cadence.com (8.14.4/8.14.4) with ESMTP id 1BDCKOQ1048902; Mon, 13 Dec 2021 13:20:24 +0100 Received: (from pawell@localhost) by gli-login.cadence.com (8.14.4/8.14.4/Submit) id 1BDCKNp5048753; Mon, 13 Dec 2021 13:20:23 +0100 From: Pawel Laszczak To: CC: , , , , , Subject: [PATCH] usb: cdnsp: Fix lack of spin_lock_irqsave/spin_lock_restore Date: Mon, 13 Dec 2021 13:20:01 +0100 Message-ID: <20211213122001.47370-1-pawell@gli-login.cadence.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-OrganizationHeadersPreserved: maileu3.global.cadence.com X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 21b78f3c-1527-4337-2820-08d9be32f8fc X-MS-TrafficTypeDiagnostic: BL0PR07MB4035:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:2887; 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X-OriginatorOrg: cadence.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Dec 2021 12:20:38.3615 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 21b78f3c-1527-4337-2820-08d9be32f8fc X-MS-Exchange-CrossTenant-Id: d36035c5-6ce6-4662-a3dc-e762e61ae4c9 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=d36035c5-6ce6-4662-a3dc-e762e61ae4c9;Ip=[64.207.220.244];Helo=[wcmailrelayl01.cadence.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM12FT056.eop-nam12.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR07MB4035 X-Proofpoint-ORIG-GUID: uD-fV9w9dZ6fvnqaCbFGkhP0TntAgTTm X-Proofpoint-GUID: uD-fV9w9dZ6fvnqaCbFGkhP0TntAgTTm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2021-12-13_04,2021-12-13_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_check_notspam policy=outbound_check score=0 spamscore=0 suspectscore=0 malwarescore=0 adultscore=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 mlxscore=0 mlxlogscore=532 phishscore=0 bulkscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2112130079 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Pawel Laszczak Patch puts content of cdnsp_gadget_pullup function inside spin_lock_irqsave and spin_lock_restore section. This construction is required here to keep the data consistency, otherwise some data can be changed e.g. from interrupt context. Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver") Reported-by: Ken (Jian) He cc: Signed-off-by: Pawel Laszczak --- drivers/usb/cdns3/cdnsp-gadget.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/usb/cdns3/cdnsp-gadget.c b/drivers/usb/cdns3/cdnsp-gadget.c index f6d231760a6a..d0c040556984 100644 --- a/drivers/usb/cdns3/cdnsp-gadget.c +++ b/drivers/usb/cdns3/cdnsp-gadget.c @@ -1544,8 +1544,10 @@ static int cdnsp_gadget_pullup(struct usb_gadget *gadget, int is_on) { struct cdnsp_device *pdev = gadget_to_cdnsp(gadget); struct cdns *cdns = dev_get_drvdata(pdev->dev); + unsigned long flags; trace_cdnsp_pullup(is_on); + spin_lock_irqsave(&pdev->lock, flags); if (!is_on) { cdnsp_reset_device(pdev); @@ -1553,6 +1555,9 @@ static int cdnsp_gadget_pullup(struct usb_gadget *gadget, int is_on) } else { cdns_set_vbus(cdns); } + + spin_unlock_irqrestore(&pdev->lock, flags); + return 0; }