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Mon, 30 Dec 2019 10:02:18 +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 10:03:03 +0800 Message-ID: <1577671361.8160.2.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 10:02:41 +0800 In-Reply-To: <1575426135.31411.2.camel@mtksdaap41> References: <20191121072910.31665-1-bibby.hsieh@mediatek.com> <1575426135.31411.2.camel@mtksdaap41> 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 SGksIEphc3NpOg0KDQpQaW5nIGFnYWluLg0KDQpBcmUgbWJveF9zZW5kX21lc3NhZ2UoKSBhbmQg bWJveF9jbGllbnRfdHhkb25lKCkgdGhyZWFkLXNhZmU/IElmIHRoZXNlDQp0d28gYXJlIHRocmVh ZC1zYWZlLCB0aGlzIGJ1ZyBzaG91bGQgYmUgZml4ZWQgaW4gbWFpbGJveCBjb3JlIG5vdA0KY2xp ZW50Lg0KDQpSZWdhcmRzLA0KQ0sNCg0KT24gV2VkLCAyMDE5LTEyLTA0IGF0IDEwOjIyICswODAw LCBDSyBIdSB3cm90ZToNCj4gSGksIEphc3NpOg0KPiANCj4gQXJlIG1ib3hfc2VuZF9tZXNzYWdl KCkgYW5kIG1ib3hfY2xpZW50X3R4ZG9uZSgpIHRocmVhZC1zYWZlPyBJZiB0aGVzZQ0KPiB0d28g YXJlIHRocmVhZC1zYWZlLCB0aGlzIGJ1ZyBzaG91bGQgYmUgZml4ZWQgaW4gbWFpbGJveCBjb3Jl IG5vdA0KPiBjbGllbnQuDQo+IA0KPiBSZWdhcmRzLA0KPiBDSw0KPiANCj4gT24gVGh1LCAyMDE5 LTExLTIxIGF0IDE1OjI5ICswODAwLCBCaWJieSBIc2llaCB3cm90ZToNCj4gPiBJZiBjbWRxIGNs aWVudCBpcyBtdWx0aSB0aHJlYWQgdXNlciwgcmFjaW5nIHdpbGwgb2NjdXIgd2l0aG91dCBtdXRl eA0KPiA+IHByb3RlY3Rpb24uIEl0IHdpbGwgbWFrZSB0aGUgQyBtZXNzYWdlIHF1ZXVlZCBpbiBt YWlsYm94J3MgcXVldWUNCj4gPiBhbHdheXMgbmVlZCBEIG1lc3NhZ2UncyB0cmlnZ2VyaW5nLg0K PiA+IA0KPiA+IFRocmVhZCBBCQlUaHJlYWQgQgkJICBUaHJlYWQgQwkJVGhyZWFkIEQuLi4NCj4g PiAtLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLQ0KPiA+IG1ib3hfc2VuZF9tZXNzYWdlKCkNCj4g PiAJc2VuZF9kYXRhKCkNCj4gPiAJCQltYm94X3NlbmRfbWVzc2FnZSgpDQo+ID4gCQkJCSpleGl0 DQo+ID4gCQkJCQkJbWJveF9zZW5kX21lc3NhZ2UoKQ0KPiA+IAkJCQkJCQkqZXhpdA0KPiA+IG1i b3hfY2xpZW50X3R4ZG9uZSgpDQo+ID4gCXR4X3RpY2soKQ0KPiA+IAkJCW1ib3hfY2xpZW50X3R4 ZG9uZSgpDQo+ID4gCQkJCXR4X3RpY2soKQ0KPiA+IAkJCQkJCW1ib3hfY2xpZW50X3R4ZG9uZSgp DQo+ID4gCQkJCQkJCXR4X3RpY2soKQ0KPiA+IG1zZ19zdWJtaXQoKQ0KPiA+IAlzZW5kX2RhdGEo KQ0KPiA+IAkJCW1zZ19zdWJtaXQoKQ0KPiA+IAkJCQkqZXhpdA0KPiA+IAkJCQkJCW1zZ19zdWJt aXQoKQ0KPiA+IAkJCQkJCQkqZXhpdA0KPiA+IC0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tDQo+ ID4gDQo+ID4gU2lnbmVkLW9mZi1ieTogQmliYnkgSHNpZWggPGJpYmJ5LmhzaWVoQG1lZGlhdGVr LmNvbT4NCj4gPiAtLS0NCj4gPiAgZHJpdmVycy9zb2MvbWVkaWF0ZWsvbXRrLWNtZHEtaGVscGVy LmMgfCAzICsrKw0KPiA+ICBpbmNsdWRlL2xpbnV4L3NvYy9tZWRpYXRlay9tdGstY21kcS5oICB8 IDEgKw0KPiA+ICAyIGZpbGVzIGNoYW5nZWQsIDQgaW5zZXJ0aW9ucygrKQ0KPiA+IA0KPiA+IGRp ZmYgLS1naXQgYS9kcml2ZXJzL3NvYy9tZWRpYXRlay9tdGstY21kcS1oZWxwZXIuYyBiL2RyaXZl cnMvc29jL21lZGlhdGVrL210ay1jbWRxLWhlbHBlci5jDQo+ID4gaW5kZXggOWFkZDBmZDVmYTZj Li45ZTM1ZTBiZWZmYWEgMTAwNjQ0DQo+ID4gLS0tIGEvZHJpdmVycy9zb2MvbWVkaWF0ZWsvbXRr LWNtZHEtaGVscGVyLmMNCj4gPiArKysgYi9kcml2ZXJzL3NvYy9tZWRpYXRlay9tdGstY21kcS1o ZWxwZXIuYw0KPiA+IEBAIC04MSw2ICs4MSw3IEBAIHN0cnVjdCBjbWRxX2NsaWVudCAqY21kcV9t Ym94X2NyZWF0ZShzdHJ1Y3QgZGV2aWNlICpkZXYsIGludCBpbmRleCwgdTMyIHRpbWVvdXQpDQo+ ID4gIAljbGllbnQtPmNsaWVudC5kZXYgPSBkZXY7DQo+ID4gIAljbGllbnQtPmNsaWVudC50eF9i bG9jayA9IGZhbHNlOw0KPiA+ICAJY2xpZW50LT5jaGFuID0gbWJveF9yZXF1ZXN0X2NoYW5uZWwo JmNsaWVudC0+Y2xpZW50LCBpbmRleCk7DQo+ID4gKwltdXRleF9pbml0KCZjbGllbnQtPm11dGV4 KTsNCj4gPiAgDQo+ID4gIAlpZiAoSVNfRVJSKGNsaWVudC0+Y2hhbikpIHsNCj4gPiAgCQlsb25n IGVycjsNCj4gPiBAQCAtMzUyLDkgKzM1MywxMSBAQCBpbnQgY21kcV9wa3RfZmx1c2hfYXN5bmMo c3RydWN0IGNtZHFfcGt0ICpwa3QsIGNtZHFfYXN5bmNfZmx1c2hfY2IgY2IsDQo+ID4gIAkJc3Bp bl91bmxvY2tfaXJxcmVzdG9yZSgmY2xpZW50LT5sb2NrLCBmbGFncyk7DQo+ID4gIAl9DQo+ID4g IA0KPiA+ICsJbXV0ZXhfbG9jaygmY2xpZW50LT5tdXRleCk7DQo+ID4gIAltYm94X3NlbmRfbWVz c2FnZShjbGllbnQtPmNoYW4sIHBrdCk7DQo+ID4gIAkvKiBXZSBjYW4gc2VuZCBuZXh0IHBhY2tl dCBpbW1lZGlhdGVseSwgc28ganVzdCBjYWxsIHR4ZG9uZS4gKi8NCj4gPiAgCW1ib3hfY2xpZW50 X3R4ZG9uZShjbGllbnQtPmNoYW4sIDApOw0KPiA+ICsJbXV0ZXhfdW5sb2NrKCZjbGllbnQtPm11 dGV4KTsNCj4gPiAgDQo+ID4gIAlyZXR1cm4gMDsNCj4gPiAgfQ0KPiA+IGRpZmYgLS1naXQgYS9p bmNsdWRlL2xpbnV4L3NvYy9tZWRpYXRlay9tdGstY21kcS5oIGIvaW5jbHVkZS9saW51eC9zb2Mv bWVkaWF0ZWsvbXRrLWNtZHEuaA0KPiA+IGluZGV4IGE3NGMxZDVhY2RmMy4uMGY5MDcxY2QxYmM3 IDEwMDY0NA0KPiA+IC0tLSBhL2luY2x1ZGUvbGludXgvc29jL21lZGlhdGVrL210ay1jbWRxLmgN Cj4gPiArKysgYi9pbmNsdWRlL2xpbnV4L3NvYy9tZWRpYXRlay9tdGstY21kcS5oDQo+ID4gQEAg LTI4LDYgKzI4LDcgQEAgc3RydWN0IGNtZHFfY2xpZW50IHsNCj4gPiAgCXN0cnVjdCBtYm94X2No YW4gKmNoYW47DQo+ID4gIAlzdHJ1Y3QgdGltZXJfbGlzdCB0aW1lcjsNCj4gPiAgCXUzMiB0aW1l b3V0X21zOyAvKiBpbiB1bml0IG9mIG1pY3Jvc2Vjb25kICovDQo+ID4gKwlzdHJ1Y3QgbXV0ZXgg bXV0ZXg7DQo+ID4gIH07DQo+ID4gIA0KPiA+ICAvKioNCj4gDQoNCg==