[bugzilla-daemon@bugzilla.kernel.org: [Bug 204385] New: Failed to resume from S3 with thunderbolt daisy chain]

[bugzilla-daemon@bugzilla.kernel.org: [Bug 204385] New: Failed to resume from S3 with thunderbolt daisy chain]

[Bjorn Helgaas]

AceLan, before suspending, can you please run "sudo lspci -vv" and
attach the complete output to the bugzilla?

----- Forwarded message from bugzilla-daemon@bugzilla.kernel.org -----

Date: Wed, 31 Jul 2019 02:58:33 +0000
From: bugzilla-daemon@bugzilla.kernel.org
To: bugzilla.pci@gmail.com
Subject: [Bug 204385] New: Failed to resume from S3 with thunderbolt daisy
	chain
Message-ID: <bug-204385-193951@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=204385

            Bug ID: 204385
           Summary: Failed to resume from S3 with thunderbolt daisy chain
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.3.0-rc2
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: PCI
          Assignee: drivers_pci@kernel-bugs.osdl.org
          Reporter: acelan@gmail.com
        Regression: No

Created attachment 284047
  --> https://bugzilla.kernel.org/attachment.cgi?id=284047&action=edit
dmesg.log

The system can't resume while connecting to a tbt storage and a tbt monitor
over Thunderbolt port(daisy-chaining)

Dell Precision 5540 --> Dell WD19TB Thunderbolt Dock --> ASUS-Display PA27AC
--> HP P800 Thunderbolt Storage

Reproduce steps:
1. Connect Dell WD19TB Thunderbolt Dock to your system(thunderbolt port)
2. Connect ASUS-Display PA27AC(thuderbolt port) to WD19TB(thunderbolt port)
3. Connect HP P800 thunderbolt storage to PA27AC display(thunderbolt port)
4. mount and access files on HP P800
5. enter S3(echo deep | sudo tee /sys/power/mem_sleep && systemctl suspend) and
resume
6. it hangs

It works well if laptop
1. connects to HP P800 directly
2. or connects to ASUS monitor directly
3. or connects to ASUS monitor -> HP P800
4. or connects to WD19TB -> HP P800
5. or connects to WD19TB -> ASUS monitor

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