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The xHCI >> dependency is missing so it won't compile. Goal of this RFC is >> discussing the direction of sound/usb changes. > > Any specific reason you aren't cc: linux-usb@vger.kernel.org on USB > stuff like this? Actually I was expecting the exact opposite feedback had I included linux-usb, given lack of drivers/usb changes. Lesson learned. However, given the current feedback, for the next revision I plan to rebase onto your tree and include the xHCI changes. While I'm familiar with sound/ practices, I clearly was not with drivers/usb/ ones. The initial offload-aware vs offload-unaware USB audio-device filtering stuff was done by xHCI. Thanks to Mathias now I'm aware there is no place for such specific class code in drivers/usb/host. I'll try to get the usb changes adjusted as quickly as possible so that the list can see the entire thing. Kind regards, Czarek