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=-13.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,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 A29DFC2D0C3 for ; Mon, 30 Dec 2019 06:44:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 64F3E207E0 for ; Mon, 30 Dec 2019 06:44:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="CKwzmNAP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727140AbfL3Go0 (ORCPT ); Mon, 30 Dec 2019 01:44:26 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:52005 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727136AbfL3Go0 (ORCPT ); Mon, 30 Dec 2019 01:44:26 -0500 X-UUID: c1c4b10a17914d3e9de8771be33c59d6-20191230 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=2JEQv42DFUUU456BpXiLJVg53m301BGWjGWt9M3Fzlk=; b=CKwzmNAP1rTKSzbkV2j7fTUsbsmVECe4+IZdSxgi86YLM8WBxSkQrAYldL3zQCCIDZtckDOYMGMIgQy03Lk6IOWpG7W4rWB2tdS6Z4GyCNzhPl7wFCNp6/nRaTo37Vj0Qe7ZkJ8s3WPSG8f/g5GHKkFusVrYIO6cRKvYEqwSSII=; X-UUID: c1c4b10a17914d3e9de8771be33c59d6-20191230 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 1251939889; Mon, 30 Dec 2019 14:44:21 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs05n2.mediatek.inc (172.21.101.140) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 30 Dec 2019 14:43:51 +0800 Received: from [172.21.77.4] (172.21.77.4) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 30 Dec 2019 14:44:36 +0800 Message-ID: <1577688253.17931.11.camel@mtksdaap41> Subject: Re: [PATCH] soc: mediatek: cmdq: avoid racing condition with mutex From: CK Hu To: Bibby Hsieh CC: Jassi Brar , Matthias Brugger , Rob Herring , , , , , , Nicolas Boichat , Dennis-YC Hsieh , Houlong Wei Date: Mon, 30 Dec 2019 14:44:13 +0800 In-Reply-To: <20191121072910.31665-1-bibby.hsieh@mediatek.com> References: <20191121072910.31665-1-bibby.hsieh@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-MTK: N Content-Transfer-Encoding: base64 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org SGksIEJpYmJ5Og0KDQpPbiBUaHUsIDIwMTktMTEtMjEgYXQgMTU6MjkgKzA4MDAsIEJpYmJ5IEhz aWVoIHdyb3RlOg0KPiBJZiBjbWRxIGNsaWVudCBpcyBtdWx0aSB0aHJlYWQgdXNlciwgcmFjaW5n IHdpbGwgb2NjdXIgd2l0aG91dCBtdXRleA0KPiBwcm90ZWN0aW9uLiBJdCB3aWxsIG1ha2UgdGhl IEMgbWVzc2FnZSBxdWV1ZWQgaW4gbWFpbGJveCdzIHF1ZXVlDQo+IGFsd2F5cyBuZWVkIEQgbWVz c2FnZSdzIHRyaWdnZXJpbmcuDQo+IA0KPiBUaHJlYWQgQQkJVGhyZWFkIEIJCSAgVGhyZWFkIEMJ CVRocmVhZCBELi4uDQo+IC0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tDQo+IG1ib3hfc2VuZF9t ZXNzYWdlKCkNCj4gCXNlbmRfZGF0YSgpDQo+IAkJCW1ib3hfc2VuZF9tZXNzYWdlKCkNCj4gCQkJ CSpleGl0DQo+IAkJCQkJCW1ib3hfc2VuZF9tZXNzYWdlKCkNCj4gCQkJCQkJCSpleGl0DQo+IG1i b3hfY2xpZW50X3R4ZG9uZSgpDQo+IAl0eF90aWNrKCkNCj4gCQkJbWJveF9jbGllbnRfdHhkb25l KCkNCj4gCQkJCXR4X3RpY2soKQ0KPiAJCQkJCQltYm94X2NsaWVudF90eGRvbmUoKQ0KPiAJCQkJ CQkJdHhfdGljaygpDQo+IG1zZ19zdWJtaXQoKQ0KPiAJc2VuZF9kYXRhKCkNCj4gCQkJbXNnX3N1 Ym1pdCgpDQo+IAkJCQkqZXhpdA0KPiAJCQkJCQltc2dfc3VibWl0KCkNCj4gCQkJCQkJCSpleGl0 DQo+IC0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tDQo+IA0KPiBTaWduZWQtb2ZmLWJ5OiBCaWJi eSBIc2llaCA8YmliYnkuaHNpZWhAbWVkaWF0ZWsuY29tPg0KPiAtLS0NCj4gIGRyaXZlcnMvc29j L21lZGlhdGVrL210ay1jbWRxLWhlbHBlci5jIHwgMyArKysNCj4gIGluY2x1ZGUvbGludXgvc29j L21lZGlhdGVrL210ay1jbWRxLmggIHwgMSArDQo+ICAyIGZpbGVzIGNoYW5nZWQsIDQgaW5zZXJ0 aW9ucygrKQ0KPiANCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvc29jL21lZGlhdGVrL210ay1jbWRx LWhlbHBlci5jIGIvZHJpdmVycy9zb2MvbWVkaWF0ZWsvbXRrLWNtZHEtaGVscGVyLmMNCj4gaW5k ZXggOWFkZDBmZDVmYTZjLi45ZTM1ZTBiZWZmYWEgMTAwNjQ0DQo+IC0tLSBhL2RyaXZlcnMvc29j L21lZGlhdGVrL210ay1jbWRxLWhlbHBlci5jDQo+ICsrKyBiL2RyaXZlcnMvc29jL21lZGlhdGVr L210ay1jbWRxLWhlbHBlci5jDQo+IEBAIC04MSw2ICs4MSw3IEBAIHN0cnVjdCBjbWRxX2NsaWVu dCAqY21kcV9tYm94X2NyZWF0ZShzdHJ1Y3QgZGV2aWNlICpkZXYsIGludCBpbmRleCwgdTMyIHRp bWVvdXQpDQo+ICAJY2xpZW50LT5jbGllbnQuZGV2ID0gZGV2Ow0KPiAgCWNsaWVudC0+Y2xpZW50 LnR4X2Jsb2NrID0gZmFsc2U7DQo+ICAJY2xpZW50LT5jaGFuID0gbWJveF9yZXF1ZXN0X2NoYW5u ZWwoJmNsaWVudC0+Y2xpZW50LCBpbmRleCk7DQo+ICsJbXV0ZXhfaW5pdCgmY2xpZW50LT5tdXRl eCk7DQo+ICANCj4gIAlpZiAoSVNfRVJSKGNsaWVudC0+Y2hhbikpIHsNCj4gIAkJbG9uZyBlcnI7 DQo+IEBAIC0zNTIsOSArMzUzLDExIEBAIGludCBjbWRxX3BrdF9mbHVzaF9hc3luYyhzdHJ1Y3Qg Y21kcV9wa3QgKnBrdCwgY21kcV9hc3luY19mbHVzaF9jYiBjYiwNCj4gIAkJc3Bpbl91bmxvY2tf aXJxcmVzdG9yZSgmY2xpZW50LT5sb2NrLCBmbGFncyk7DQo+ICAJfQ0KPiAgDQo+ICsJbXV0ZXhf bG9jaygmY2xpZW50LT5tdXRleCk7DQo+ICAJbWJveF9zZW5kX21lc3NhZ2UoY2xpZW50LT5jaGFu LCBwa3QpOw0KPiAgCS8qIFdlIGNhbiBzZW5kIG5leHQgcGFja2V0IGltbWVkaWF0ZWx5LCBzbyBq dXN0IGNhbGwgdHhkb25lLiAqLw0KPiAgCW1ib3hfY2xpZW50X3R4ZG9uZShjbGllbnQtPmNoYW4s IDApOw0KPiArCW11dGV4X3VubG9jaygmY2xpZW50LT5tdXRleCk7DQoNCg0KSW4gWzFdLCBNZWRp YXRlayBEUk0gaXMgdGhlIGZpcnN0IGNsaWVudCB0byB1c2UgY21kcSBhbmQgaXQgYWxyZWFkeSBo YXMNCml0cyBvd24gbXV0ZXggdG8gcHJvdGVjdCB0aGlzLiBJIHRoaW5rIGhlbHBlciBpcyBzb21l dGhpbmcgaGVscCBtYW55DQp1c2VyIGJ1dCBub3cgSSBqdXN0IHNlZSBNZWRpYXRlayBNRFAgWzJd IG5lZWQgdGhpcy4gRm9yIERSTSwgdGhlcmUgYXJlDQpzbyBtYW55IHVzZWxlc3MgY29kZSBpbiBj bWRxX3BrdF9mbHVzaF9hc3luYygpLiBEUk0gZG9lcyBub3QgbmVlZCB0aGUNCnRpbWVyIHRvIGNo ZWNrIHRpbWVvdXQuIERSTSBjb3VsZCBkbyBkbWFfc3luY19zaW5nbGVfZm9yX2NwdSgpIGluIGl0 cw0KY2FsbGJhY2sgYW5kIG5lZWQgbm90IHRvIGNyZWF0ZSBhIGludGVybWVkaWF0ZSBjYWxsYmFj ayB0byBkbyB0aGlzLiBJDQp3b3VsZCBhZ3JlZSB0aGlzIHBhdGNoIG9ubHkgd2hlbiBJIHNlZSB0 d28gb3IgbW9yZSB1c2VyIG5lZWQgdGhpcy4NCg0KDQpbMV0NCmh0dHBzOi8vZ2l0aHViLmNvbS9j a2h1LW1lZGlhdGVrL2xpbnV4LmdpdC10YWdzL2NvbW1pdC80ZGYxMmVkMTg2NmQxMTA0ZjYzMWUw NjIxOGJkMTVmZGU1MTJhNzllDQpbMl0gaHR0cHM6Ly9wYXRjaHdvcmsua2VybmVsLm9yZy9wYXRj aC8xMDk0NTYwOS8NCg0KUmVnYXJkcywNCkNLDQoNCj4gIA0KPiAgCXJldHVybiAwOw0KPiAgfQ0K PiBkaWZmIC0tZ2l0IGEvaW5jbHVkZS9saW51eC9zb2MvbWVkaWF0ZWsvbXRrLWNtZHEuaCBiL2lu Y2x1ZGUvbGludXgvc29jL21lZGlhdGVrL210ay1jbWRxLmgNCj4gaW5kZXggYTc0YzFkNWFjZGYz Li4wZjkwNzFjZDFiYzcgMTAwNjQ0DQo+IC0tLSBhL2luY2x1ZGUvbGludXgvc29jL21lZGlhdGVr L210ay1jbWRxLmgNCj4gKysrIGIvaW5jbHVkZS9saW51eC9zb2MvbWVkaWF0ZWsvbXRrLWNtZHEu aA0KPiBAQCAtMjgsNiArMjgsNyBAQCBzdHJ1Y3QgY21kcV9jbGllbnQgew0KPiAgCXN0cnVjdCBt Ym94X2NoYW4gKmNoYW47DQo+ICAJc3RydWN0IHRpbWVyX2xpc3QgdGltZXI7DQo+ICAJdTMyIHRp bWVvdXRfbXM7IC8qIGluIHVuaXQgb2YgbWljcm9zZWNvbmQgKi8NCj4gKwlzdHJ1Y3QgbXV0ZXgg bXV0ZXg7DQo+ICB9Ow0KPiAgDQo+ICAvKioNCg0K