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Document or change behavior with 0-length setup requests #46

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xairy opened this issue Aug 19, 2023 · 2 comments
Open

Document or change behavior with 0-length setup requests #46

xairy opened this issue Aug 19, 2023 · 2 comments
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documentation Improvements or additions to documentation kernel Requires kernel changes raw gadget Requires changes in Raw Gadget

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@xairy
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xairy commented Aug 19, 2023

Currently, Raw Gadget considers all requests with wLength == 0 to be OUT requests regardless of bRequestType.

This follows the HCD drivers' behavior (also this), but I'm not sure if this makes sense for the gadget side.

We need to either document this behavior or change it.
@dukezuoHZ
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I find this issue too,if usb_ctrlrequest carried option data, We cann't get it. how to fix this issue?

@xairy
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xairy commented Jan 6, 2024

This issue is only related to 0-length requests, which carry no data. If your request transfers data, you're having a different issue.

@xairy xairy added kernel Requires kernel changes raw gadget Requires changes in Raw Gadget docs documentation Improvements or additions to documentation and removed docs labels Jun 16, 2024
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