From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 5044781DCB for ; Sun, 13 Nov 2016 17:45:43 -0800 (PST) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga101.jf.intel.com with ESMTP; 13 Nov 2016 17:45:47 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,487,1473145200"; d="scan'208,217";a="901017562" Received: from fmsmsx104.amr.corp.intel.com ([10.18.124.202]) by orsmga003.jf.intel.com with ESMTP; 13 Nov 2016 17:45:47 -0800 Received: from shsmsx102.ccr.corp.intel.com (10.239.4.154) by fmsmsx104.amr.corp.intel.com (10.18.124.202) with Microsoft SMTP Server (TLS) id 14.3.248.2; Sun, 13 Nov 2016 17:45:47 -0800 Received: from shsmsx101.ccr.corp.intel.com ([169.254.1.239]) by shsmsx102.ccr.corp.intel.com ([169.254.2.239]) with mapi id 14.03.0248.002; Mon, 14 Nov 2016 09:45:43 +0800 From: "Tian, Feng" To: "Anbazhagan, Baraneedharan" , "edk2-devel@lists.01.org" CC: "Tian, Feng" Thread-Topic: USB hub port reset Thread-Index: AdI9P9a4p+GKnaQeTV6wi4G+bYD8YgA2K+gg Date: Mon, 14 Nov 2016 01:45:42 +0000 Message-ID: <7F1BAD85ADEA444D97065A60D2E97EE566E4F108@SHSMSX101.ccr.corp.intel.com> References: In-Reply-To: Accept-Language: zh-CN, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] MIME-Version: 1.0 X-Content-Filtered-By: Mailman/MimeDel 2.1.21 Subject: Re: 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: Mon, 14 Nov 2016 01:45:43 -0000 Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, Baranee Linux wait 10 + 40 ms (TRSTRCY =3D 10 ms, plus extra 40 ms). Do you mean ED= KII should be same with linux to wait more time? Thanks Feng From: Anbazhagan, Baraneedharan [mailto:anbazhagan@hp.com] Sent: Sunday, November 13, 2016 11:53 AM To: edk2-devel@lists.01.org; Tian, Feng Subject: USB hub port reset 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