+Jeremy,

I review the patch and think it is reasonable, but I want to know some more detail information

  1.  Can you provide the detail debug log about USB?
  2.  The symptom always can be seen or have fail rate?

Best Regards
Guomin
From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Guomin Jiang
Sent: Thursday, August 6, 2020 12:29 PM
To: devel@edk2.groups.io; lbfeng@zd-tech.com.cn
Subject: Re: [edk2-devel] [PATCH] MdeModulePkg/UsbBusDxe: some USB PenDisk fails enumeration.

I will review it by next weekend(8/14).

Thanks.
From: devel@edk2.groups.io<mailto:devel@edk2.groups.io> <devel@edk2.groups.io<mailto:devel@edk2.groups.io>> On Behalf Of Feng Libo
Sent: Thursday, August 6, 2020 9:25 AM
To: Feng Libo <lbfeng@zd-tech.com.cn<mailto:lbfeng@zd-tech.com.cn>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io>
Subject: Re: [edk2-devel] [PATCH] MdeModulePkg/UsbBusDxe: some USB PenDisk fails enumeration.

Hello,

could anyone review this PATCH?

We encountered the USB enumeration problem and the patch is based on the Microsoft post as below.

https://techcommunity.microsoft.com/t5/microsoft-usb-blog/how-does-usb-stack-enumerate-a-device/ba-p/270685#:~:text=%20How%20does%20USB%20stack%20enumerate%20a%20device%3F,a%20request%20for%20the%20USB%20Device...%20More%20

Thanks

Best Regards

Feng Libo