Re: [PATCH] USB: quirks: add NO_LPM for Kingston DataTraveler Duo

[sashiko-bot@kernel.org]

> The Kingston DataTraveler Duo (0951:173c) repeatedly disconnects and
> reconnects when attached to a SuperSpeed root-hub port with USB 3 Link
> Power Management enabled. The kernel logs only a plain "USB disconnect",
> with no I/O errors or resets, and the drive re-enumerates about 0.25 s
> later. On a Framework 13 (Tiger Lake TCSS xHCI, 8086:9a13) running
> 7.2.11, one drive re-enumerated 72 times in about 5.5 minutes. The same
> drive also disconnects repeatedly on a Dell XPS from around 2016 with
> older kernels, so the problem is not tied to one host controller.
> Several drives of this model show the same behaviour.
> 
> The disconnects happen about 0.45 s after the host sends a command to
> an idle drive, such as the first INQUIRY after enumeration or the
> periodic media-change poll. Sustained reads are unaffected. This points
> to the drive failing to exit U1/U2.
> 
> Disabling LPM with usbcore.quirks=0951:173c:k stops the disconnects
> completely, including during a 497 MB read and accesses after idle
> periods.
> 
> Another owner of this drive reported the same problem in 2021
> (linked below).
> 
> The Kingston DataTraveler 3.0 (0951:1666) had the same symptom and
> already has this quirk, added in commit afaa2e745a24 ("USB: Add NO_LPM
> quirk for Kingston flash drive") after bugzilla #208257.
> 
> Link: https://community.frame.work/t/device-incompatibility-kingston-datatraveler-duo/11477
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=222222
> Cc: stable@vger.kernel.org
> Signed-off-by: Bram van den Heuvel <bram@vandenheuvel.online>

Sashiko has reviewed this patch and found no issues.

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