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Sun, 31 May 2020 21:45:02 +0800 Message-ID: <1590932706.25636.14.camel@mtkswgap22> Subject: RE: [PATCH v2 1/5] scsi: ufs-mediatek: Fix imprecise waiting time for ref-clk control From: Stanley Chu To: Avri Altman CC: "linux-scsi@vger.kernel.org" , "martin.petersen@oracle.com" , "alim.akhtar@samsung.com" , "jejb@linux.ibm.com" , "beanhuo@micron.com" , "asutoshd@codeaurora.org" , "cang@codeaurora.org" , "matthias.bgg@gmail.com" , "bvanassche@acm.org" , "linux-mediatek@lists.infradead.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "kuohong.wang@mediatek.com" , "peter.wang@mediatek.com" , "chun-hung.wu@mediatek.com" , "andy.teng@mediatek.com" , "cc.chou@mediatek.com" , "chaotian.jing@mediatek.com" , "pengshun.zhao@mediatek.com" Date: Sun, 31 May 2020 21:45:06 +0800 In-Reply-To: References: <20200529092310.1106-1-stanley.chu@mediatek.com> <20200529092310.1106-2-stanley.chu@mediatek.com> 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-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SGkgQXZyaSwNCg0KT24gU3VuLCAyMDIwLTA1LTMxIGF0IDA3OjEwICswMDAwLCBBdnJpIEFsdG1h biB3cm90ZToNCj4gPiANCj4gPiBDdXJyZW50bHkgcmVmLWNsayBjb250cm9sIHRpbWVvdXQgaXMg aW1wbGVtZW50ZWQgYnkgSmlmZmllcy4gSG93ZXZlcg0KPiA+IGppZmZpZXMgaXMgbm90IGFjY3Vy YXRlIGVub3VnaCB0aHVzICJmYWxzZSB0aW1lb3V0IiBtYXkgaGFwcGVuLg0KPiA+IA0KPiA+IFVz ZSBtb3JlIGFjY3VyYXRlIGRlbGF5IG1lY2hhbmlzbSBpbnN0ZWFkLCBmb3IgZXhhbXBsZSwga3Rp bWUuDQo+ID4gDQo+ID4gU2lnbmVkLW9mZi1ieTogU3RhbmxleSBDaHUgPHN0YW5sZXkuY2h1QG1l ZGlhdGVrLmNvbT4NCj4gPiBSZXZpZXdlZC1ieTogQW5keSBUZW5nIDxhbmR5LnRlbmdAbWVkaWF0 ZWsuY29tPg0KPiBSZXZpZXdlZC1ieTogQXZyaSBBbHRtYW4gPGF2cmkuYWx0bWFuQHdkYy5jb20+ DQo+IA0KDQpUaGFua3MgZm9yIHlvdXIgcmV2aWV3Lg0KDQo+ID4gDQo+ID4gICAgICAgICAvKiBX YWl0IGZvciBhY2sgKi8NCj4gPiAtICAgICAgIHRpbWVvdXQgPSBqaWZmaWVzICsgbXNlY3NfdG9f amlmZmllcyhSRUZDTEtfUkVRX1RJTUVPVVRfTVMpOw0KPiA+ICsgICAgICAgdGltZW91dCA9IGt0 aW1lX2FkZF91cyhrdGltZV9nZXQoKSwgUkVGQ0xLX1JFUV9USU1FT1VUX1VTKTsNCj4gPiAgICAg ICAgIGRvIHsNCj4gPiArICAgICAgICAgICAgICAgdGltZV9jaGVja2VkID0ga3RpbWVfZ2V0KCk7 DQo+ID4gICAgICAgICAgICAgICAgIHZhbHVlID0gdWZzaGNkX3JlYWRsKGhiYSwgUkVHX1VGU19S RUZDTEtfQ1RSTCk7DQo+ID4gDQo+ID4gICAgICAgICAgICAgICAgIC8qIFdhaXQgdW50aWwgYWNr IGJpdCBlcXVhbHMgdG8gcmVxIGJpdCAqLw0KPiA+IEBAIC0xNDQsNyArMTQ1LDcgQEAgc3RhdGlj IGludCB1ZnNfbXRrX3NldHVwX3JlZl9jbGsoc3RydWN0IHVmc19oYmEgKmhiYSwNCj4gPiBib29s IG9uKQ0KPiA+ICAgICAgICAgICAgICAgICAgICAgICAgIGdvdG8gb3V0Ow0KPiA+IA0KPiA+ICAg ICAgICAgICAgICAgICB1c2xlZXBfcmFuZ2UoMTAwLCAyMDApOw0KPiA+IC0gICAgICAgfSB3aGls ZSAodGltZV9iZWZvcmUoamlmZmllcywgdGltZW91dCkpOw0KPiA+ICsgICAgICAgfSB3aGlsZSAo a3RpbWVfYmVmb3JlKHRpbWVfY2hlY2tlZCwgdGltZW91dCkpOw0KPiBOaXQ6IHlvdSBjb3VsZCBn ZXQgcmlkIG9mIHRpbWVfY2hlY2tlZCBpZiB5b3Ugd291bGQgdXNlIGt0aW1lX2NvbXBhcmUoa3Rp bWVfZ2V0KCksIHRpbWVvdXQpID4gMA0KPiANCj4gVGhhbmtzLA0KPiBBdnJpDQoNCklmIHRoaXMg Y29udGV4dCBpcyBwcmVlbXB0ZWQgYW5kIHNjaGVkdWxlZCBvdXQgYmV0d2VlbiB1ZnNoY2RfcmVh ZGwoKQ0KYW5kIGt0aW1lX2NvbXBhcmUoa3RpbWVfZ2V0KCksIHRpbWVvdXQpLCB0aGVuIHRoZSBr dGltZV9nZXQoKSBtYXkgZ2V0IGENCiJ0aW1lZC1vdXQiIHRpbWUgZXZlbiB0aG91Z2ggdGhlIGxh c3QgdWZzaGNkX3JlYWRsKCkgaXMgYWN0dWFsbHkNCmV4ZWN1dGVkIGJlZm9yZSB0aGUgInRpbWVk LW91dCIgdGltZS4gSW4gdGhpcyBjYXNlLCBmYWxzZSBhbGFybSB3aWxsDQpzaG93IHVwLiBVc2lu ZyAidGltZV9jaGVja2VkIiBoZXJlIGNvdWxkIHNvbHZlIGFib3ZlIGlzc3VlLg0KDQpUaGFua3Ms DQpTdGFubGV5IENodQ0KDQoNCg==