On Wed, Jan 16, 2019 at 7:37 PM He, Bo <bo...@intel.com> wrote:
>
> Hi, Green:
>         if you check the latest kernel, you can see the below 3 patches 
> introduce the cancelled_list feature can fix the issue:
>
> commit fec9095bdef4e7c988adb603d0d4f92ee735d4a1
> Author: Felipe Balbi <felipe.ba...@linux.intel.com>
> Date:   Wed Aug 1 13:56:50 2018 +0300
>
>     usb: dwc3: gadget: remove wait_end_transfer
>
>     Now that we have a list of cancelled requests, we can skip over TRBs
>     when END_TRANSFER command completes.
>
>     Signed-off-by: Felipe Balbi <felipe.ba...@linux.intel.com>
>
> commit d4f1afe5e896c18ae01099a85dab5e1a198bd2a8
> Author: Felipe Balbi <felipe.ba...@linux.intel.com>
> Date:   Wed Aug 1 13:54:25 2018 +0300
>
>     usb: dwc3: gadget: move requests to cancelled_list
>
>     Whenever we have a request in flight, we can move it to the cancelled
>     list and later simply iterate over that list and skip over any TRBs we
>     find.
>
>     Signed-off-by: Felipe Balbi <felipe.ba...@linux.intel.com>
>
> commit d5443bbf5fc8f8389cce146b1fc2987cdd229d12
> Author: Felipe Balbi <felipe.ba...@linux.intel.com>
> Date:   Wed Aug 1 13:53:29 2018 +0300
>
>     usb: dwc3: gadget: introduce cancelled_list
>
>     This list will host cancelled requests who still have TRBs being
>     processed.
>
>     Signed-off-by: Felipe Balbi <felipe.ba...@linux.intel.com>
>

Oh, excellent. I'll check those out. Thanks!
-Evan

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