Re: [edk2-devel] empty USB DVD disk hang Xhci

["Chao Li" <lichao@loongson.cn>]

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Hi Likun,

I'm saw this PR was blocked by some CI entries, and it looks like the 
coding style ECC check is failing, details message are on the azure CI 
site: 
https://dev.azure.com/tianocore/edk2-ci/_build/results?buildId=99105&view=ms.vss-test-web.build-test-results-tab&runId=864236&resultId=100010&paneView=attachments. 


CI has given the recommondations, refer to following image:


Please modify your patch as suggested by CI:

1. Reduce the spaces between "EPRing" and "=".

2. Add a new blank line at the end of the code you added.

And then you can submit PR again.


Liming,

Please create the new push label after Likun finished. Thank you!


Thanks,
Chao
在 2023/8/2 13:29, gaoliming via groups.io 写道:
>
> https://github.com/tianocore/edk2/pull/4709 is created to merge this 
> patch.
>
> Thanks
>
> Liming
>
> *发件人:*devel@edk2.groups.io <devel@edk2.groups.io> *代表 *Chao Li
> *发送时间:*2023年7月27日15:24
> *收件人:*devel@edk2.groups.io; sulikun@loongson.cn; Wu, Hao A 
> <hao.a.wu@intel.com>
> *抄送:*Gao, Liming <gaoliming@byosoft.com.cn>; Demeter, Miki 
> <miki.demeter@intel.com>
> *主题:*Re: [edk2-devel] empty USB DVD disk hang Xhci
>
> Hi Likun,
>
> Liming and Hao have reviewd and acked your patch, I think you can 
> submit your patch on edk2 repo and don't forget include Liming and Hao 
> review message. Good job!
>
> Thanks,
> Chao
>
> 在2023/7/27 11:21, 苏丽坤 写道:
>
>     Hi, Hao,Liming,
>
>        this is my reply，function XhcInitializeDeviceSlot64 will init
>     EndpointTransferRing,while fuctionUsbMassReadBlocks return
>     (Invalid Parameter), which result in run function UsbMassReset,
>     this will call  XhcDisableSlotCmd64, will clear
>     EndpointTransferRing, like
>     this Xhc->UsbDevContext[SlotId].EndpointTransferRing[Index] =
>     NULL;  If  fuctionUsbMassReadBlocks returnsuccess also run
>     function UsbMassReset, will hang for the same reason. why
>     fuctionUsbMassReadBlocks return (Invalid Parameter), this function
>     will call UsbBootRequestSense,this retun (Invalid Parameter). At
>     the same time, Ehci also retun (Invalid Parameter).
>
>     Thanks
>
>         -----原始邮件-----
>         *发件人:*"Wu, Hao A" <hao.a.wu@intel.com>
>         <mailto:hao.a.wu@intel.com>
>         *发送时间:*2023-07-25 10:18:42 (星期二)
>         *收件人:*"Gao, Liming" <gaoliming@byosoft.com.cn>
>         <mailto:gaoliming@byosoft.com.cn>, "devel@edk2.groups.io"
>         <mailto:devel@edk2.groups.io> <devel@edk2.groups.io>
>         <mailto:devel@edk2.groups.io>, "sulikun@loongson.cn"
>         <mailto:sulikun@loongson.cn> <sulikun@loongson.cn>
>         <mailto:sulikun@loongson.cn>, "Demeter, Miki"
>         <miki.demeter@intel.com> <mailto:miki.demeter@intel.com>
>         *主题:*RE: [edk2-devel] empty USB DVD disk hang Xhci
>
>         Sorry, I do not have much resource to review this in detail.
>         But the patch generally looks good to me:
>
>         Acked-by: Hao A Wu hao.a.wu@intel.com
>
>         However, I hope the below question can be answered (or add
>         related information to the commit log message) before mering:
>
>         Likun, could you help to elaborate a bit more on why the below
>         statement will return NULL pointer for “USB DVD with empty disk”?
>
>         EPRing        = (TRANSFER_RING
>         *)(UINTN)Xhc->UsbDevContext[SlotId].EndpointTransferRing[Dci-1];
>
>         Best Regards,
>
>         Hao Wu
>
>         *From:*gaoliming <gaoliming@byosoft.com.cn>
>         <mailto:gaoliming@byosoft.com.cn>
>         *Sent:* Tuesday, July 25, 2023 9:44 AM
>         *To:* devel@edk2.groups.io; sulikun@loongson.cn; Demeter, Miki
>         <miki.demeter@intel.com> <mailto:miki.demeter@intel.com>
>         *Cc:* Wu, Hao A <hao.a.wu@intel.com> <mailto:hao.a.wu@intel.com>
>         *Subject:* 回复: [edk2-devel] empty USB DVD disk hang Xhci
>
>         Likun:
>
>          This change is good to me.  Reviewed-by: Liming Gao
>         <gaoliming@byosoft.com.cn>
>
>         Hao:
>
>          Have you time to review this fix?
>
>         Thanks
>
>         Liming
>
>         *发件人:*devel@edk2.groups.io <devel@edk2.groups.io> *代表 *苏丽坤
>         *发送时间:*2023年7月18日9:49
>         *收件人:*gaoliming@byosoft.com.cn; miki.demeter@intel.com;
>         devel@edk2.groups.io
>         *主题:*[edk2-devel] empty USB DVD disk hang Xhci
>
>         Hi
>
>             We find a bug in xhci, USB DVD boot with emtpy disk will
>         hang Xhci while Ehci can pass.
>
>             The hang log is shown as :
>         MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c(1847): TrsRing !=
>         ((void *) 0)
>
>             We suggest a way to solve this bug is shown as:
>         https://github.com/suling-123/edk2 the latest commit, 
>          MdeModulePkg: Solve boot hang xhci driver when use USB DVD
>         with empty disk, 950bc8781d81b96b0c7944e7ac947382b1bc0c06
>
>
>
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