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=-5.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=ham 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 C8340C433DF for ; Sat, 16 May 2020 13:23:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 95F40206D8 for ; Sat, 16 May 2020 13:23:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="NVN2Tpyj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726276AbgEPNX5 (ORCPT ); Sat, 16 May 2020 09:23:57 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:40548 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726245AbgEPNX4 (ORCPT ); Sat, 16 May 2020 09:23:56 -0400 X-UUID: df400191c4d84be68061ff4a332682b3-20200516 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=RurzsbN02/QUThs3HzT434TYi503FodH5xCpi40Zuwg=; b=NVN2Tpyj4BFLmptqRCllGgtTPU7Fcclj1cdb/rZ1mSXXkgWcpO1UgrGCmXC7JGVorFn7ikxb8c8GR4rBPaAudWLxOC+19xaagZSyHUWqaRHETqBf+gxA3brAoLz2vlSxxcWn5U+0yeI1q+otmagqEgm9bRR+nM1tcQFE1vx117k=; X-UUID: df400191c4d84be68061ff4a332682b3-20200516 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 389630958; Sat, 16 May 2020 21:23:53 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs05n2.mediatek.inc (172.21.101.140) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sat, 16 May 2020 21:23:50 +0800 Received: from [172.21.77.33] (172.21.77.33) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sat, 16 May 2020 21:23:50 +0800 Message-ID: <1589635432.3197.115.camel@mtkswgap22> Subject: Re: [PATCH RFC] ufs: Make ufshcd_wait_for_register() sleep instead of busy-waiting From: Stanley Chu To: Bart Van Assche CC: "Asutosh Das (asd)" , "Martin K . Petersen" , "James E . J . Bottomley" , , Can Guo , Avri Altman , Bean Huo , Alim Akhtar Date: Sat, 16 May 2020 21:23:52 +0800 In-Reply-To: <16bb7e00-abbd-060c-c775-ae49a024d7de@acm.org> References: <20200507222750.19113-1-bvanassche@acm.org> <198a1467-09db-f846-e153-a9681ff15b71@codeaurora.org> <16bb7e00-abbd-060c-c775-ae49a024d7de@acm.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-MTK: N Content-Transfer-Encoding: base64 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org SGkgQmFydCwNCg0KT24gRnJpLCAyMDIwLTA1LTE1IGF0IDEyOjI4IC0wNzAwLCBCYXJ0IFZhbiBB c3NjaGUgd3JvdGU6DQo+IE9uIDIwMjAtMDUtMDggMDk6MjcsIEFzdXRvc2ggRGFzIChhc2QpIHdy b3RlOg0KPiA+IE9uIDUvNy8yMDIwIDM6MjcgUE0sIEJhcnQgVmFuIEFzc2NoZSB3cm90ZToNCj4g Pj4gVGhlIHVmc2hjZF93YWl0X2Zvcl9yZWdpc3RlcigpIGZ1bmN0aW9uIGVpdGhlciBzbGVlcHMg b3Igc3BpbnMgdW50aWwgdGhlDQo+ID4+IHNwZWNpZmllZCByZWdpc3RlciBoYXMgcmVhY2hlZCB0 aGUgZGVzaXJlZCB2YWx1ZS4gQnVzeS13YWl0aW5nIGlzIG5vdA0KPiA+PiBvbmx5IGNvbnNpZGVy ZWQgYSBiYWQgcHJhY3RpY2UgYnV0IGFsc28gaGFzIGEgYmFkIGltcGFjdCBvbiBlbmVyZ3kNCj4g Pj4gY29uc3VtcHRpb24uIEFsd2F5cyBzbGVlcCBpbnN0ZWFkIG9mIHNwaW5uaW5nIGJ5IG1ha2lu ZyBzdXJlIHRoYXQgYWxsDQo+ID4+IHVmc2hjZF93YWl0X2Zvcl9yZWdpc3RlcigpIGNhbGxzIGhh cHBlbiBmcm9tIGEgY29udGV4dCB3aGVyZSBpdCBpcw0KPiA+PiBhbGxvd2VkIHRvIHNsZWVwLiBU aGUgb25seSBmdW5jdGlvbiBjYWxsIHRoYXQgaGFzIHRvIGJlIG1vdmVkIGlzIHRoZQ0KPiA+PiB1 ZnNoY2RfaGJhX3N0b3AoKSBjYWxsIGluIHVmc2hjZF9ob3N0X3Jlc2V0X2FuZF9yZXN0b3JlKCku DQo+ID4+DQo+ID4+IENjOiBDYW4gR3VvIDxjYW5nQGNvZGVhdXJvcmEub3JnPg0KPiA+PiBDYzog QXZyaSBBbHRtYW4gPGF2cmkuYWx0bWFuQHdkYy5jb20+DQo+ID4+IENjOiBCZWFuIEh1byA8YmVh bmh1b0BtaWNyb24uY29tPg0KPiA+PiBDYzogQWxpbSBBa2h0YXIgPGFsaW0uYWtodGFyQHNhbXN1 bmcuY29tPg0KPiA+PiBDYzogQXN1dG9zaCBEYXMgPGFzdXRvc2hkQGNvZGVhdXJvcmEub3JnPg0K PiA+PiBTaWduZWQtb2ZmLWJ5OiBCYXJ0IFZhbiBBc3NjaGUgPGJ2YW5hc3NjaGVAYWNtLm9yZz4N Cg0KUmV2aWV3ZWQtYnk6IFN0YW5sZXkgQ2h1IDxzdGFubGV5LmNodUBtZWRpYXRlay5jb20+DQoN Cg==