From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_SANE_2 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFF38C433ED for ; Wed, 12 May 2021 02:03:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B3CDC6127A for ; Wed, 12 May 2021 02:03:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230109AbhELCE4 (ORCPT ); Tue, 11 May 2021 22:04:56 -0400 Received: from Mailgw01.mediatek.com ([1.203.163.78]:59727 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S229934AbhELCEz (ORCPT ); Tue, 11 May 2021 22:04:55 -0400 X-UUID: 7dd48654e91b4cf49193b651f8a1d0ee-20210512 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:MIME-Version:Content-Type:References:In-Reply-To:Date:CC:To:From:Subject:Message-ID; bh=PwJHRqwBEarNjfAVmhlQxjauvjjxcaY8dzl8Reekzso=; b=mcz9/hgW/2l4XxvUCm5Q9oLOFBv60sRwPbTkKWNBTZ8u33jGbZI/5jV1pQKHZV2Ytp1302oVhmjczEKUtEQvNqerxNEMkZVTF/Stz1P7XvXwCxk7ju8/DBaHGu1rttrchgnL/bNBj8CtaNwbj4VQNXuAD/sFgKQoVfog8XhYZIY=; X-UUID: 7dd48654e91b4cf49193b651f8a1d0ee-20210512 Received: from mtkcas34.mediatek.inc [(172.27.4.253)] by mailgw01.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1628613659; Wed, 12 May 2021 10:03:40 +0800 Received: from MTKCAS36.mediatek.inc (172.27.4.186) by MTKMBS31N2.mediatek.inc (172.27.4.87) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 12 May 2021 10:03:38 +0800 Received: from [10.17.3.153] (10.17.3.153) by MTKCAS36.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 12 May 2021 10:03:37 +0800 Message-ID: <1620785017.25159.5.camel@mhfsdcap03> Subject: Re: [PATCH] usb: core: hub: fix race condition about TRSMRCY of resume From: Chunfeng Yun To: Alan Stern CC: Greg Kroah-Hartman , Matthias Brugger , Thinh Nguyen , "Gustavo A . R . Silva" , Bixuan Cui , Eugeniu Rosca , "Oliver Neukum" , , , , , Tianping Fang , Eddie Hung , "Ikjoon Jang" Date: Wed, 12 May 2021 10:03:37 +0800 In-Reply-To: <20210511163907.GB901897@rowland.harvard.edu> References: <20210511101522.34193-1-chunfeng.yun@mediatek.com> <20210511163907.GB901897@rowland.harvard.edu> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: E3079C5BB8EAEF3DC9471B8695BAD55DD3FA211E210FA2A8C5F3E4DBC356237E2000:8 X-MTK: N Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gVHVlLCAyMDIxLTA1LTExIGF0IDEyOjM5IC0wNDAwLCBBbGFuIFN0ZXJuIHdyb3RlOg0KPiBP biBUdWUsIE1heSAxMSwgMjAyMSBhdCAwNjoxNToyMlBNICswODAwLCBDaHVuZmVuZyBZdW4gd3Jv dGU6DQo+ID4gVGhpcyBtYXkgaGFwcGVuIGlmIHRoZSBwb3J0IGJlY29tZXMgcmVzdW1lIHN0YXR1 cyBleGFjdGx5DQo+ID4gd2hlbiB1c2JfcG9ydF9yZXN1bWUoKSBnZXRzIHBvcnQgc3RhdHVzLCBp dCBzdGlsbCBuZWVkIHByb3ZpZGUNCj4gPiBhIFRSU01DUlkgdGltZSBiZWZvcmUgYWNjZXNzIHRo ZSBkZXZpY2UuDQo+ID4gDQo+ID4gUmVwb3J0ZWQtYnk6IFRpYW5waW5nIEZhbmcgPHRpYW5waW5n LmZhbmdAbWVkaWF0ZWsuY29tPg0KPiA+IFNpZ25lZC1vZmYtYnk6IENodW5mZW5nIFl1biA8Y2h1 bmZlbmcueXVuQG1lZGlhdGVrLmNvbT4NCj4gDQo+IFRoaXMgc2hvdWxkIGFsc28gc2F5Og0KPiAN Cj4gQ0M6IDxzdGFibGVAdmdlci5rZXJuZWwub3JnPg0KDQpPSywgdGhhbmtzDQoNCj4gDQo+ID4g LS0tDQo+ID4gIGRyaXZlcnMvdXNiL2NvcmUvaHViLmMgfCA2ICsrKy0tLQ0KPiA+ICAxIGZpbGUg Y2hhbmdlZCwgMyBpbnNlcnRpb25zKCspLCAzIGRlbGV0aW9ucygtKQ0KPiA+IA0KPiA+IGRpZmYg LS1naXQgYS9kcml2ZXJzL3VzYi9jb3JlL2h1Yi5jIGIvZHJpdmVycy91c2IvY29yZS9odWIuYw0K PiA+IGluZGV4IGIyYmM0YjdjNDI4OS4uZmM3ZDZjZGFjZjE2IDEwMDY0NA0KPiA+IC0tLSBhL2Ry aXZlcnMvdXNiL2NvcmUvaHViLmMNCj4gPiArKysgYi9kcml2ZXJzL3VzYi9jb3JlL2h1Yi5jDQo+ ID4gQEAgLTM2NDIsOSArMzY0Miw2IEBAIGludCB1c2JfcG9ydF9yZXN1bWUoc3RydWN0IHVzYl9k ZXZpY2UgKnVkZXYsIHBtX21lc3NhZ2VfdCBtc2cpDQo+ID4gIAkJICogc2VxdWVuY2UuDQo+ID4g IAkJICovDQo+ID4gIAkJc3RhdHVzID0gaHViX3BvcnRfc3RhdHVzKGh1YiwgcG9ydDEsICZwb3J0 c3RhdHVzLCAmcG9ydGNoYW5nZSk7DQo+ID4gLQ0KPiA+IC0JCS8qIFRSU01SQ1kgPSAxMCBtc2Vj ICovDQo+ID4gLQkJbXNsZWVwKDEwKTsNCj4gPiAgCX0NCj4gPiAgDQo+ID4gICBTdXNwZW5kQ2xl YXJlZDoNCj4gPiBAQCAtMzY1OSw2ICszNjU2LDkgQEAgaW50IHVzYl9wb3J0X3Jlc3VtZShzdHJ1 Y3QgdXNiX2RldmljZSAqdWRldiwgcG1fbWVzc2FnZV90IG1zZykNCj4gPiAgCQkJCXVzYl9jbGVh cl9wb3J0X2ZlYXR1cmUoaHViLT5oZGV2LCBwb3J0MSwNCj4gPiAgCQkJCQkJVVNCX1BPUlRfRkVB VF9DX1NVU1BFTkQpOw0KPiA+ICAJCX0NCj4gPiArDQo+ID4gKwkJLyogVFJTTVJDWSA9IDEwIG1z ZWMgKi8NCj4gPiArCQltc2xlZXAoMTApOw0KPiA+ICAJfQ0KPiA+ICANCj4gPiAgCWlmICh1ZGV2 LT5wZXJzaXN0X2VuYWJsZWQpDQo+IA0KPiBBY2tlZC1ieTogQWxhbiBTdGVybiA8c3Rlcm5Acm93 bGFuZC5oYXJ2YXJkLmVkdT4NCg0K