linux-kernel - Re: xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 1 comp

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Date: Fri, 5 Apr 2024 11:32:47 +0200
From: Michał Pecio <michal.pecio@...il.com>
To: Paul Menzel <pmenzel@...gen.mpg.de>
Cc: linux-usb@...r.kernel.org, Mathias Nyman <mathias.nyman@...el.com>, LKML
 <linux-kernel@...r.kernel.org>
Subject: Re: xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not
 part of current TD ep_index 1 comp_code 1

Hi,

> On a Dell XPS 13 9360/0596KF, BIOS 2.21.0 06/02/2022 with Debian 
> sid/unstable, at least Linux 6.8-rc7 and 6.9-rc1+ log the error
> below, when unplugging a USB headset from the USB Type A port of the
> laptop.
Can you reproduce this on other computers or with other USB devices?
(I just tested a few random audio dongles on my PC, nothing happens).

Is there any kernel version known to be free of this problem?

>      xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part
> of current TD ep_index 1 comp_code 1
>      xhci_hcd 0000:00:14.0: Looking for event-dma 0000000128897080 
> trb-start 0000000128897090 trb-end 0000000128897090 seg-start 
> 0000000128897000 seg-end 0000000128897ff0
This looks like the xHCI driver freed data structures related to a USB
transfer concurrently with the hardware executing this transfer. It's
a bad thing which should never happen, but sometimes it does because of
bugs in USB controllers or the driver.

Can you run patched kernels on the affected laptop? I attach a patch
I used to track down similar issues on UVC webcams. It doesn't fix
anything, but adds some dmesg noise which may be helpful in figuring
out what goes wrong. The patch should work on v6.9-rc1 or -rc2.

Regards,
Michal

View attachment "xhci-noise.patch" of type "text/x-patch" (6208 bytes)