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Date:   Fri, 12 Mar 2021 16:56:42 -0500
From:   Alan Stern <stern@rowland.harvard.edu>
To:     Sedat Dilek <sedat.dilek@gmail.com>
Cc:     Mathias Nyman <mathias.nyman@intel.com>, linux-usb@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: [xhci] usb 4-1: reset SuperSpeed Gen 1 USB device number 2 using
 xhci_hcd
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On Fri, Mar 12, 2021 at 07:26:31PM +0100, Sedat Dilek wrote:
> On Fri, Mar 12, 2021 at 7:05 PM Alan Stern <stern@rowland.harvard.edu> wrote:

> > Although it's not conclusive, this log seems to indicate that ata_id
> > is the only program causing resets.  Have you tried preventing the
> > ata_id program from running (for example, by renaming it)?
> >
> 
> This is /lib/udev/ata_id from Debian's udev package.

That does not answer my question.

> > > Your diff now should say; s/SCSI ioctl error/SCSI ioctl info'.
> >
> > No, it shouldn't.  The log message itself is an info, but the event it
> > reports is an error.
> >
> 
> OK.
> Some of these SCSI ioctl errors are not causing a xhci-reset.

Yes, I noticed that.  In fact, the commands that cause a reset are all 
A1 (and not all of them), never 85.

> > > Alan, so "t" flags should be added as a quirks to linux-kernel sources...
> > >
> > > t = NO_ATA_1X  (don't allow ATA(12) and ATA(16) commands, uas only);
> > >
> > > ...for my ASMedia USB-3.0 controller?
> >
> > That's not at all clear.  This is a very common and popular device,
> > and nobody else has reported these problems.  It could be that
> > something is odd about your particular drive or computer, not these
> > drives in general.
> >
> 
> So, the external USB-3.0 HDD is now in "UAS only" mode/status.

Why?  Did you change something?

Alan Stern

> Cannot judge if things got better or not.
> 
> - Sedat -