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Wed, 22 Jul 2020 17:14:15 +0800 Message-ID: <1595409255.27178.17.camel@mtkswgap22> Subject: Re: [RESEND RFC PATCH v1] scsi: ufs: add retries for SSU From: Stanley Chu To: Bart Van Assche CC: Lee Sang Hyun , , , , , , , , , , , , Date: Wed, 22 Jul 2020 17:14:15 +0800 In-Reply-To: <6ac05df5-71ff-e71d-a4df-94118f67caf1@acm.org> References: <1594971576-40264-1-git-send-email-sh425.lee@samsung.com> <6ac05df5-71ff-e71d-a4df-94118f67caf1@acm.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-TM-SNTS-SMTP: 0DACB1621FB87BE6B0743621F188702504DEEFE7B97F089E1E8F60C089218FAB2000:8 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 SGkgQmFydCwNCg0KT24gU2F0LCAyMDIwLTA3LTE4IGF0IDEzOjMwIC0wNzAwLCBCYXJ0IFZhbiBB c3NjaGUgd3JvdGU6DQo+IE9uIDIwMjAtMDctMTcgMDA6MzksIExlZSBTYW5nIEh5dW4gd3JvdGU6 DQo+ID4gLQlyZXQgPSBzY3NpX2V4ZWN1dGUoc2RwLCBjbWQsIERNQV9OT05FLCBOVUxMLCAwLCBO VUxMLCAmc3NoZHIsDQo+ID4gLQkJCVNUQVJUX1NUT1BfVElNRU9VVCwgMCwgMCwgUlFGX1BNLCBO VUxMKTsNCj4gPiAtCWlmIChyZXQpIHsNCj4gPiAtCQlzZGV2X3ByaW50ayhLRVJOX1dBUk5JTkcs IHNkcCwNCj4gPiAtCQkJICAgICJTVEFSVF9TVE9QIGZhaWxlZCBmb3IgcG93ZXIgbW9kZTogJWQs IHJlc3VsdCAleFxuIiwNCj4gPiAtCQkJICAgIHB3cl9tb2RlLCByZXQpOw0KPiA+IC0JCWlmIChk cml2ZXJfYnl0ZShyZXQpID09IERSSVZFUl9TRU5TRSkNCj4gPiAtCQkJc2NzaV9wcmludF9zZW5z ZV9oZHIoc2RwLCBOVUxMLCAmc3NoZHIpOw0KPiA+ICsJZm9yIChyZXRyaWVzID0gMDsgcmV0cmll cyA8IFNTVV9SRVRSSUVTOyByZXRyaWVzKyspIHsNCj4gPiArCQlyZXQgPSBzY3NpX2V4ZWN1dGUo c2RwLCBjbWQsIERNQV9OT05FLCBOVUxMLCAwLCBOVUxMLCAmc3NoZHIsDQo+ID4gKwkJCQlTVEFS VF9TVE9QX1RJTUVPVVQsIDAsIDAsIFJRRl9QTSwgTlVMTCk7DQo+ID4gKwkJaWYgKHJldCkgew0K PiA+ICsJCQlzZGV2X3ByaW50ayhLRVJOX1dBUk5JTkcsIHNkcCwNCj4gPiArCQkJCSAgICAiU1RB UlRfU1RPUCBmYWlsZWQgZm9yIHBvd2VyIG1vZGU6ICVkLCByZXN1bHQgJXhcbiIsDQo+ID4gKwkJ CQkgICAgcHdyX21vZGUsIHJldCk7DQo+ID4gKwkJCWlmIChkcml2ZXJfYnl0ZShyZXQpID09IERS SVZFUl9TRU5TRSkNCj4gPiArCQkJCXNjc2lfcHJpbnRfc2Vuc2VfaGRyKHNkcCwgTlVMTCwgJnNz aGRyKTsNCj4gPiArCQl9IGVsc2Ugew0KPiA+ICsJCQlicmVhazsNCj4gPiArCQl9DQo+IA0KPiBU aGUgbmludGggYXJndW1lbnQgb2Ygc2NzaV9leGVjdXRlKCkgaXMgY2FsbGVkICdyZXRyaWVzJy4g V291bGRuJ3QgaXQgYmUNCj4gYmV0dGVyIHRvIHBhc3MgYSBub256ZXJvIHZhbHVlIGFzIHRoZSAn cmV0cmllcycgYXJndW1lbnQgb2YNCj4gc2NzaV9leGVjdXRlKCkgaW5zdGVhZCBvZiBhZGRpbmcg YSBsb29wIGFyb3VuZCB0aGUgc2NzaV9leGVjdXRlKCkgY2FsbD8NCg0KSWYgYSBTQ1NJIGNvbW1h bmQgaXNzdWVkIHZpYSBzY3NpX2V4ZWN1dGUoKSBlbmNvdW50ZXJzICJ0aW1lb3V0IiBvcg0KImNo ZWNrIGNvbmRpdGlvbiIsIHNjc2lfbm9yZXRyeV9jbWQoKSB3aWxsIHJldHVybiAxICh0cnVlKSBi ZWNhdXNlDQpibGtfcnFfaXNfcGFzc3Rocm91Z2goKSBpcyB0cnVlIGR1ZSB0byBSRVFfT1BfU0NT SV9JTiBvciBSRVFfT1BfU0NTSV9PVVQNCmZsYWcgd2FzIHNldCB0byB0aGlzIFNDU0kgY29tbWFu ZCBieSBzY3NpX2V4ZWN1dGUoKS4gVGhlcmVmb3JlIGV2ZW4gYQ0Kbm9uLXplcm8gJ3JldHJpZXMn IHZhbHVlIGlzIGFzc2lnbmVkIHdoaWxlIGNhbGxpbmcgc2NzaV9leGVjdXRlKCksIHRoZQ0KZmFp bGVkIGNvbW1hbmQgaGFzIG5vIGNoYW5jZSB0byBiZSByZXRyaWVkIHNpbmNlIHRoZSBkZWNpc2lv biB3aWxsIGJlDQpuby1yZXRyeSBieSBzY3NpX25vcmV0cnlfY21kKCkuDQoNCihUYWtlIGNvbW1h bmQgdGltZW91dCBhcyBleGFtcGxlKQ0Kc2NzaV90aW1lc19vdXQoKS0+c2NzaV9hYm9ydF9jb21t YW5kKCktPnNjbWRfZWhfYWJvcnRfaGFuZGxlcigpLCBoZXJlDQpzY3NpX25vcmV0cnlfY21kKCkg cmV0dXJucyAxLCBhbmQgdGhlbiBjb21tYW5kIHdpbGwgYmUgZmluaXNoZWQgKHdpdGgNCmVycm9y IGNvZGUpIHdpdGhvdXQgcmV0cnkuDQoNCkluIHNjc2lfbm9yZXRyeV9jbWQoKSwgdGhlcmUgaXMg YSBjb21tZW50IG1lc3NhZ2UgaW4gc2VjdGlvbg0KImNoZWNrX3R5cGUiIGFzIGJlbG93DQoNCgkv Kg0KCSAqIGFzc3VtZSBjYWxsZXIgaGFzIGNoZWNrZWQgc2Vuc2UgYW5kIGRldGVybWluZWQNCgkg KiB0aGUgY2hlY2sgY29uZGl0aW9uIHdhcyByZXRyeWFibGUuDQoJICovDQoNCkkgYW0gbm90IHN1 cmUgaWYgInRpbWVvdXQiIGFuZCAiY2hlY2sgY29uZGl0aW9uIiBjYXNlcyBpbiBzdWNoIFNDU0kN CmNvbW1hbmRzIGlzc3VlZCB2aWEgc2NzaV9leGVjdXRlKCkgYXJlIHNwZWNpYWxseSBkZXNpZ25l ZCB0byBiZSB1bmFibGUNCnRvIHJldHJ5Lg0KDQpXb3VsZCB5b3UgaGF2ZSBhbnkgc3VnZ2VzdGlv bnMgaWYgTExEIGRyaXZlcnMgd291bGQgbGlrZSB0byByZXRyeSB0aGVzZQ0Ka2luZHMgb2YgU0NT SSBjb21tYW5kcz8NCg0KVGhhbmtzIGEgbG90LA0KU3RhbmxleSBDaHUNCg0K