[Bug 213081] usb-storage / uas Genesys Logic Card Reader no longer working on 5.12

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=213081

--- Comment #9 from Peter Ganzhorn (peter.ganzhorn@googlemail.com) ---
Created attachment 296815
  --> https://bugzilla.kernel.org/attachment.cgi?id=296815&action=edit
git bisect log

Well bisecting went quicker than I expected, but I don't think I can come up
with a solution for this myself.
git bisect found commit 674f8438c12125d6b4fe51d44b9316bb02b286b5 xhci: split
handling halted endpoints into two steps as the culprit, but the last two
builds before finding this final commit already refused to boot correctly.
I guess this one is part of a bigger patch series which the bisect process cut
in half at some point.
The description of the commit mentions:

    Note: This removes the RESET_EP_QUIRK handling which was added in
    commit ac9d8fe7c6a8 ("USB: xhci: Add quirk for Fresco Logic xHCI
hardware.")

    This quirk was added in 2009 for prototype xHCI hardware meant for
    evaluation purposes only, and should not reach consumers.

Which made me raise an eyebrow. After reading this I am not sure if I may have
some misbehaving/broken-by-design hardware here.

I'll take the liberty of adding Mathias Nyman who authored the commit I found
to be involved in this issue to the CC list.
Hopefully he can shed some light on this.

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