[Bug 219924] xhci_hcd TRB DMA error and device lockup with AKLOT 2i2 USB audio interface

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219924

Michał Pecio (michal.pecio@gmail.com) changed:

           What    |Removed                     |Added
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                 CC|                            |michal.pecio@gmail.com

--- Comment #1 from Michał Pecio (michal.pecio@gmail.com) ---
> [Mar25 21:35] usb 3-5: USB disconnect, device number 7
> [  +0.000005] usb 3-5.1: USB disconnect, device number 8
> [  +0.001183] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not
> part of current TD ep_index 1 comp_code 1
> [  +0.000006] xhci_hcd 0000:00:14.0: Looking for event-dma 00000000ffa87930
> trb-start 00000000ffa87940 trb-end 00000000ffa87940 seg-start
> 00000000ffa87000 seg-end 00000000ffa87ff0
> [  +0.000153] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not
> part of current TD ep_index 1 comp_code 1
> [  +0.000001] xhci_hcd 0000:00:14.0: Looking for event-dma 00000000ffa87940
> trb-start 00000000ffa87950 trb-end 00000000ffa87950 seg-start
> 00000000ffa87000 seg-end 00000000ffa87ff0
> [  +0.000119] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not
> part of current TD ep_index 1 comp_code 1
> [  +0.000002] xhci_hcd 0000:00:14.0: Looking for event-dma 00000000ffa87950
> trb-start 00000000ffa87960 trb-end 00000000ffa87960 seg-start
> 00000000ffa87000 seg-end 00000000ffa87ff0

This looks like we get transfer events normally each microframe but for some
reason TDs are consistently dropped from the driver's internal list one step
too early. Very bizarre.

Are you able to test a newer kernel like 6.14 or 6.13.x, or at least the 6.12
LTS series? The 6.8 series is frankly no longer supported here, and TBH we
can't be sure if it's not a bug unique to Ubuntu 6.8 kernel due to a botched
backport of some changes from newer releases.

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