linux-kernel - Re: [bugzilla-daemon@...nel.org: [Bug 218360] New: Disk drive of TBT3/USB4 storage device can’t show up if connecting behind TBT3 dock or some USB4 docks DFP TBT port]

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Date: Thu, 11 Jan 2024 08:02:58 +0530
From: Sanath S <sanaths2@....com>
To: Bjorn Helgaas <helgaas@...nel.org>,
 Alex Williamson <alex.williamson@...hat.com>,
 Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc: Sanath S <Sanath.S@....com>, shyam-sundar.s-k@....com,
 Andreas Noever <andreas.noever@...il.com>,
 Michael Jamet <michael.jamet@...el.com>,
 Yehezkel Bernat <YehezkelShB@...il.com>, linux-usb@...r.kernel.org,
 linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [bugzilla-daemon@...nel.org: [Bug 218360] New: Disk drive of TBT3/USB4 storage device can’t show up if connecting behind TBT3 dock or some USB4 docks DFP TBT port]


On 1/11/2024 12:30 AM, Bjorn Helgaas wrote:
> #regzbot introduced: d3fcd7360338 ("PCI: Fix runtime PM race with PME polling")
>
> Sanath, thank you very much for this report and the bisection!
>
> I assume this happens on hot-adds, i.e., you boot the kernel, then
> connect a USB4 dock, then connect the TBT3/USB4 storage device to the
> dock?
Yes, correct.
> Would you be able to attach the complete dmesgs log from working and
> failing kernels?  The ideal would be from d3fcd7360338 ("PCI: Fix
> runtime PM race with PME polling"), which fails, and 5cd903bce9dd
> ("PCI/VPD: Add runtime power management to sysfs interface"), which
> presumably works.  But v6.7 and v6.5 is OK too.
Sure. I'll get that.
Do you want any debug to be enabled ?
> Also the output of "sudo lspci -vv", which I assume doesn't depend on
> which kernel you're running.
>
> Bjorn
>
> ----- Forwarded message from bugzilla-daemon@...nel.org -----
>
> Date: Wed, 10 Jan 2024 10:52:40 +0000
> From: bugzilla-daemon@...nel.org
> To: bjorn@...gaas.com
> Subject: [Bug 218360] New: Disk drive of TBT3/USB4 storage device can’t show up if connecting behind TBT3 dock
> 	or some USB4 docks DFP TBT port
> Message-ID: <bug-218360-41252@...ps.bugzilla.kernel.org/>
>
> https://bugzilla.kernel.org/show_bug.cgi?id=218360
>
>              Bug ID: 218360
>             Summary: Disk drive of TBT3/USB4 storage device can’t show up
>                      if connecting behind TBT3 dock or some USB4 docks DFP
>                      TBT port
>            Reporter: Sanath.S@....com
>
> The disk drive of the TBT3/USB4 storage device can’t show up behind TBT3 dock
> and some USB4 docks have a DFP TBT port.
>
> TBT3/USB4 storage device can be authorized, the disk drive doesn’t show up.
>
> Issue reproduce sequence: Connect USB4 dock to host → Connect TBT3/USB4 storage
> device to dock DFP TBT3 port → TBT3/USB4 storage device disk driver can’t show
> up.
>
> The issue was observed in the latest mainline kernel 6.7.
>
>
> Failing on all the below combination
>
> HP Thunderbolt Dock 120W G2 HSN-IX01
> HP Hook 2.0 USB4/TBT4 Dock (PV Phase)
> CalDigit TS3Plus+ Thunderbolt Station 3 Plus
> Dell Thunderbolt Dock – WD19TB