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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Message-ID: <7090d3af-18ce-40e1-8ac2-bf18152e5c4a@molgen.mpg.de>
Date: Sat, 6 Apr 2024 16:37:31 +0200
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Michał Pecio <michal.pecio@...il.com>
Cc: Mathias Nyman <mathias.nyman@...el.com>,
 LKML <linux-kernel@...r.kernel.org>, linux-usb@...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

Dear Michał,


Thank you for your reply.


Am 05.04.24 um 11:32 schrieb Michał Pecio:

>> 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 have not tried it on another GNU/Linux system yet. It does *not* 
happen with a Plantronics Blackwire 315.1 USB headset.

> (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?

Unfortunately no. It is reproducible with Debian’s Linux kernel 6.7.9-2. 
But in the available logs I found a 6.8+ (“6.9-rc0”) boot with no such 
error messages, but I forgot to save them between reboots now, and lost 
them. Sorry.

>>       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.

Interesting. Thank you for the analysis.

> 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.

Thank you. Please find the log attached with the patch applied on:

     $ git log --no-decorate --oneline -2
     627920e87b52 usb: xhci: Add debug prints
     6c6e47d69d82 Merge tag 'firewire-fixes-6.9-rc2' of 
git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394


Kind regards,

Paul
View attachment "20240406--dell-xps-13-9360--linux-6.9-rc2+--with-xhci-patch--messages.txt" of type "text/plain" (119297 bytes)