[Bug 220307] USB cannot submit urb disconnecting sound card

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220307

Niklas Neronin (niklas.neronin@gmail.com) changed:

           What    |Removed                     |Added
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                 CC|                            |niklas.neronin@gmail.com

--- Comment #1 from Niklas Neronin (niklas.neronin@gmail.com) ---
(In reply to Evgenii from comment #0)
> Just got an error that looks like that in dmesg. Not sure what made it such,
> just using sound card with Pipewire on 192000 Hz, 53 samples quantization.
> This leads to about 0,275 ms delay while preparation of node to play sound
> takes about 0,250 ms when VLC starts playing a video. Pw-top reports about
> 0,3 ms delay in Busy field if that matters. With 64 samples there was no
> issues with preparing the node to start playing and had no conflict with
> hardware using standard Arch kernel 6.15-4-arch2-1. So seems this is a USB
> bug when sound card drops off and gets up stopping playback of sound while
> video goes further.
> 
> [  321.031944] usb 1-9: USB disconnect, device number 4
> [  321.032030] xhci_hcd 0000:00:14.0: Event dma 0x000000015a8ee570 for ep 5
> status 1 not part of TD at 000000015a8ee580 - 000000015a8ee580
> [  321.032032] xhci_hcd 0000:00:14.0: Ring seg 0 dma 0x000000015a8ee000
> [  321.032033] xhci_hcd 0000:00:14.0: Ring seg 1 dma 0x000000015a8ef000

Looks like the we receive a Transfer Event with Transfer Event with a
completion
status of "Success," but its corresponding TD is no longer in the driver's
internal list.

> [  321.032037] usb 1-9: cannot submit urb (err = -19)

USB-audio driver can still submit URBs while the device is being disconnected,
resulting in this harmless error message.

It's hard to tell from this short log what may be causing this issue.
The root cause probably occurred before this snippet.

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