From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from NAM02-BL2-obe.outbound.protection.outlook.com (mail-bl2nam02on0715.outbound.protection.outlook.com [IPv6:2a01:111:f400:fe46::715]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 7AFA081DB6 for ; Sat, 12 Nov 2016 19:52:55 -0800 (PST) Received: from AT5PR84MB0276.NAMPRD84.PROD.OUTLOOK.COM (10.162.138.22) by AT5PR84MB0276.NAMPRD84.PROD.OUTLOOK.COM (10.162.138.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.721.10; Sun, 13 Nov 2016 03:52:57 +0000 Received: from AT5PR84MB0276.NAMPRD84.PROD.OUTLOOK.COM ([10.162.138.22]) by AT5PR84MB0276.NAMPRD84.PROD.OUTLOOK.COM ([10.162.138.22]) with mapi id 15.01.0721.010; Sun, 13 Nov 2016 03:52:57 +0000 From: "Anbazhagan, Baraneedharan" To: "edk2-devel@lists.01.org" , "Tian, Feng" Thread-Topic: USB hub port reset Thread-Index: AdI9P9a4p+GKnaQeTV6wi4G+bYD8Yg== Date: Sun, 13 Nov 2016 03:52:56 +0000 Message-ID: Accept-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=anbazhagan@hp.com; x-originating-ip: [66.135.176.178] x-microsoft-exchange-diagnostics: 1; AT5PR84MB0276; 7:eekJVKNg8wEXP+H+gR2SrgIVMCr1lpPokDwbT1f9jVYQe655hzx6B2G3j8WflxOcysVuVU2e6IcjgzQnXHV6s28Q8t32rCWbGwGOPK08aj5zt47JFYqNZvZb2TQfQ6Tk+zrBJnQhVCPQdr1qZJ12SlOz1KJgtGY8Q7hojgZMjANsJVS2cuiPaCwdOHRtwm+CJ8CTZhYMvryHLB0u9cowbNwwEN2e0LW6JSMJ44Q8Fd6Pqf68ruBdSWZZ5SvjWgelfp3UzDbaPzcEikB4uT9wiF82nwY3sq2Awjry8UJ62dXAHKXz4MRqqljgafhHDJkVccGdW5Cqzq4blf5qLLBKmOuHb0p0OOE2HzqO/SyG+u8= x-ms-office365-filtering-correlation-id: 2ddde60a-ed14-4d18-1231-08d40b788de0 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(22001);SRVR:AT5PR84MB0276; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(166708455590820)(21748063052155); x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(6040176)(601004)(2401047)(5005006)(8121501046)(3002001)(10201501046); SRVR:AT5PR84MB0276; BCL:0; PCL:0; RULEID:; SRVR:AT5PR84MB0276; x-forefront-prvs: 012570D5A0 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(7916002)(336003)(6602003)(189002)(199003)(9686002)(5660300001)(3480700004)(3846002)(101416001)(3660700001)(3280700002)(122556002)(189998001)(2900100001)(7696004)(107886002)(7906003)(7736002)(33656002)(86362001)(92566002)(7846002)(68736007)(106356001)(99286002)(74316002)(77096005)(54356999)(97736004)(5001770100001)(2501003)(50986999)(105586002)(81156014)(81166006)(87936001)(2906002)(586003)(66066001)(790700001)(8936002)(102836003)(8676002)(6116002); DIR:OUT; SFP:1102; SCL:1; SRVR:AT5PR84MB0276; H:AT5PR84MB0276.NAMPRD84.PROD.OUTLOOK.COM; FPR:; SPF:None; PTR:InfoNoRecords; MX:1; A:1; LANG:en; received-spf: None (protection.outlook.com: hp.com does not designate permitted sender hosts) spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: hp.com X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Nov 2016 03:52:56.8093 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: ca7981a2-785a-463d-b82a-3db87dfc3ce6 X-MS-Exchange-Transport-CrossTenantHeadersStamped: AT5PR84MB0276 X-Content-Filtered-By: Mailman/MimeDel 2.1.21 Subject: USB hub port reset X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 13 Nov 2016 03:52:55 -0000 Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable EDK2 have reset recovery time of 10ms for hub port based on port status res= et bit but USB spec doesn't mention that port status can be used for t6/res= et recovery time. Could you please clarify? USB vendor mentions EDK2 doesn't have reset recovery time on hub port reset= and also highlighting EDK2 hub port reset differs from https://github.com/= torvalds/linux/blob/master/drivers/usb/core/hub.c#L2789 -Baranee