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[67.218.130.61]) by smtp.gmail.com with ESMTPSA id rj2sm12pjb.32.2021.11.02.13.29.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 02 Nov 2021 13:29:08 -0700 (PDT) Message-ID: <62d0ac30-f2b9-f58c-cb1e-215ccb455753@gmail.com> Date: Wed, 3 Nov 2021 04:29:01 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.1 Subject: Re: [PATCH v2] usb: core: reduce power-on-good delay time of root hub Content-Language: en-US To: Mathias Nyman , Alan Stern , Mathias Nyman Cc: Chunfeng Yun , Greg Kroah-Hartman , Matthias Brugger , Nishad Kamdar , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Eddie Hung References: <1618017645-12259-1-git-send-email-chunfeng.yun@mediatek.com> <5e907ccd-40bb-2ece-fe05-1a65a74f3aa2@gmail.com> <20211101140613.GC1456700@rowland.harvard.edu> <3cf46eaf-5443-30df-6d72-b92a6a518afc@linux.intel.com> From: "Walt Jr. Brake" In-Reply-To: <3cf46eaf-5443-30df-6d72-b92a6a518afc@linux.intel.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211102_132915_313889_87D42E1B X-CRM114-Status: GOOD ( 23.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMi8xMS8yMDIxIDE3OjA1LCBNYXRoaWFzIE55bWFuIHdyb3RlOgo+IE9uIDEuMTEuMjAyMSAx Ni4wNiwgQWxhbiBTdGVybiB3cm90ZToKPj4gT24gU2F0LCBPY3QgMzAsIDIwMjEgYXQgMTI6NDk6 MzdQTSArMDgwMCwgV2FsdCBKci4gQnJha2Ugd3JvdGU6Cj4+PiBUaGlzIHBhdGNoIG1ha2UgVVNC IDMuMSBkZXZpY2UgY2Fubm90IGJlIGRldGVjdGVkLCBhbmQgSSByZXBvcnQgdGhlIGJ1ZyBbMV0K Pj4+IHRvIGFyY2hsaW51eCB0aHJlZSBtb250aCBhZ28uIFllc3RlcmRheSBJIHRyeSB0byBmaXgg aXQgbXlzZWxmLCBhbmQgYWZ0ZXIgSQo+Pj4gcmV2ZXJ0IHRoaXMgcGF0Y2gsIGNvbXBpbGUgdGhl IGtlcm5lbCBhbmQgdGVzdCwgaXQgd29ya3MuCj4+Pgo+Pj4gWzFdIGh0dHBzOi8vYnVncy5hcmNo bGludXgub3JnL3Rhc2svNzE2NjA/cHJvamVjdD0xJnBhZ2VudW09Mgo+Pj4KPj4+Cj4+PiBkaWZm IC0tZ2l0IGEvZHJpdmVycy91c2IvY29yZS9odWIuaCBiL2RyaXZlcnMvdXNiL2NvcmUvaHViLmgK Pj4+IGluZGV4IDIyZWExZjRmMmQ2Ni4uNzNmNDQ4MmQ4MzNhIDEwMDY0NAo+Pj4gLS0tIGEvZHJp dmVycy91c2IvY29yZS9odWIuaAo+Pj4gKysrIGIvZHJpdmVycy91c2IvY29yZS9odWIuaAo+Pj4g QEAgLTE0OCwxMCArMTQ4LDggQEAgc3RhdGljIGlubGluZSB1bnNpZ25lZCBodWJfcG93ZXJfb25f Z29vZF9kZWxheShzdHJ1Y3QKPj4+IHVzYl9odWIgKmh1YikKPj4+ICDCoHsKPj4+ICDCoMKgwqDC oMKgwqDCoCB1bnNpZ25lZCBkZWxheSA9IGh1Yi0+ZGVzY3JpcHRvci0+YlB3ck9uMlB3ckdvb2Qg KiAyOwo+Pj4KPj4+IC3CoMKgwqDCoMKgwqAgaWYgKCFodWItPmhkZXYtPnBhcmVudCkgLyogcm9v dCBodWIgKi8KPj4+IC3CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJldHVybiBkZWxheTsK Pj4+IC3CoMKgwqDCoMKgwqAgZWxzZSAvKiBXYWl0IGF0IGxlYXN0IDEwMCBtc2VjIGZvciBwb3dl ciB0byBiZWNvbWUgc3RhYmxlICovCj4+PiAtwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBy ZXR1cm4gbWF4KGRlbGF5LCAxMDBVKTsKPj4+ICvCoMKgwqDCoMKgwqAgLyogV2FpdCBhdCBsZWFz dCAxMDAgbXNlYyBmb3IgcG93ZXIgdG8gYmVjb21lIHN0YWJsZSAqLwo+Pj4gK8KgwqDCoMKgwqDC oCByZXR1cm4gbWF4KGRlbGF5LCAxMDBVKTsKPj4+ICDCoH0KPj4gTWF0aGlhczoKPj4KPj4gSXQg bG9va3MgbGlrZSB0aGUgYlB3ck9uMlB3ckdvb2QgdmFsdWUgaW4geGhjaS1oY2QncyBodWIgZGVz Y3JpcHRvciBpcwo+PiB0b28gc21hbGwgZm9yIHNvbWUgVVNCIDMuMSBkZXZpY2VzLgo+Pgo+PiBD YW4geW91IGxvb2sgaW50byB0aGlzPwo+Pgo+PiBBbGFuIFN0ZXJuCj4+Cj4gQXQgZmlyc3QgZ2xh bmNlIHRoZSB4aGNpIHJvb3RodWIgYlB3ck9uMlB3ckdvb2QgdmFsdWUgbG9va3Mgb2suCj4geGhj aSBzcGVjIDUuNC44IHN0YXRlcyBzb2Z0d2FyZSBzaG91bGQgd2FpdCAyMG1zIGFmdGVyIGFzc2Vy dGluZyBQUCwgYmVmb3JlCj4gYXR0ZW1wdGluZyB0byBjaGFuZ2UgdGhlIHN0YXRlIG9mIHRoZSBw b3J0Lgo+Cj4geGhjaSBkcml2ZXIgc2V0cyBkZXNjLT5iUHdyT24yUHdyR29vZCA9IDEwOyAoMm1z IGludGVydmFsLCBzbyBlcXVhbHMgMjBtcyApCj4KPiBXZSBzaG91bGQgcHJvYmFibHkgZ2V0IHRo aXMgd29ya2luZyBpbW1lZGlhdGVseSwgc28gbWF5YmUgcmV2ZXJ0IHRoYXQgcGF0Y2gKPiB3aGls ZSBsb29raW5nIGludG8gdGhlIHJvb3RjYXVzZS4KPgo+IFdhbHQgSnIuIEJyYWtlLCBpbnN0ZWFk IG9mIHJldmVydGluZyB0aGF0IHBhdGNoLCBjb3VsZCB5b3UgdGVzdCBpZiBjaGFuZ2luZyB0aGUK PiB4aGNpIHJvb3RodWIgYlB3ck9uMlB3ckdvb2QgdmFsdWUgaGVscHMuCj4KPiBkaWZmIC0tZ2l0 IGEvZHJpdmVycy91c2IvaG9zdC94aGNpLWh1Yi5jIGIvZHJpdmVycy91c2IvaG9zdC94aGNpLWh1 Yi5jCj4gaW5kZXggYTNmODc1ZWVhNzUxLi43NTYyMzFhNTU2MDIgMTAwNjQ0Cj4gLS0tIGEvZHJp dmVycy91c2IvaG9zdC94aGNpLWh1Yi5jCj4gKysrIGIvZHJpdmVycy91c2IvaG9zdC94aGNpLWh1 Yi5jCj4gQEAgLTI1Nyw3ICsyNTcsNyBAQCBzdGF0aWMgdm9pZCB4aGNpX2NvbW1vbl9odWJfZGVz Y3JpcHRvcihzdHJ1Y3QgeGhjaV9oY2QgKnhoY2ksCj4gICB7Cj4gICAgICAgICAgdTE2IHRlbXA7 Cj4gICAKPiAtICAgICAgIGRlc2MtPmJQd3JPbjJQd3JHb29kID0gMTA7ICAgICAgLyogeGhjaSBz ZWN0aW9uIDUuNC45IHNheXMgMjBtcyBtYXggKi8KPiArICAgICAgIGRlc2MtPmJQd3JPbjJQd3JH b29kID0gNTA7ICAgICAgLyogVGhlIDIwbXMgaW4geGhjaSA1LjQuOCBpc24ndCBlbm91Z2ggZm9y IFVTQiAzLjEgKi8KPiAgICAgICAgICBkZXNjLT5iSHViQ29udHJDdXJyZW50ID0gMDsKPiAgIAo+ ICAgICAgICAgIGRlc2MtPmJOYnJQb3J0cyA9IHBvcnRzOwo+Cj4gVGhhbmtzCj4gLU1hdGhpYXMK Ck1hdGhpYXM6CgpTb3JyeSB0byByZXBseSBsYXRlbHkuIEkgdGVzdCB3aXRoIHlvdXIgcGF0Y2gs IGl0IHdvcmtzLgoKSSBhbHNvIHRlc3Qgd2l0aCBzZXR0aW5nIGJQd3JPbjJQd3JHb29kIHRvIDQ1 LCBhbmQgaXQgbm90IHdvcmsuCgpTZWVtcyB0aGF0IHRoZSBtaW5pbWFsIHZhbHVlIHNob3VsZCBi ZSA1MCBmb3IgdGhpcyBjYXNlLgoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJu ZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK