linux-kernel - Re: [xhci] usb 4-1: reset SuperSpeed Gen 1 USB device number 2 using xhci

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Date:   Sun, 7 Mar 2021 17:57:39 +0100
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Alan Stern <stern@...land.harvard.edu>
Cc:     Mathias Nyman <mathias.nyman@...el.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [xhci] usb 4-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd

On Sun, Mar 7, 2021 at 4:46 PM Alan Stern <stern@...land.harvard.edu> wrote:
>
> On Sat, Mar 06, 2021 at 09:49:00PM +0100, Sedat Dilek wrote:
>
> > For testing purposes, I stopped these systemd services:
> >
> > 1. systemctl stop smartmontools.service
> >
> > 2. systemctl stop udisks2.service
> >
> > Last seen xhci-reset:
> >
> > [Sat Mar  6 21:37:40 2021] SCSI ioctl error, cmd 85, prog pool-udisksd
> >
> > So, that every 10min xhci-reset was caused by pool-udisksd from udisks2.service.
>
> You have found the cause of your problem!  Great!
>
> And now, obviously order to fix the problem, you'll have to look into
> the udisks2 service.  Maybe you can configure it so that it won't send
> the problem-causing commands.
>

I tried yesterday to add --debug option to the ExexStart line of
udisks2.service, but did not see anything helpful.

There exist more user-space than udisks2 causing these xhci-resets.
The cmd#s are also clear: A1 and 85 - whatever they mean.

As said with Linux v5.10.y and Linux v5.11 I have not seen this.

What about CCing linux-block and linux-scsi people?

- Sedat -