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From:   bugzilla-daemon@bugzilla.kernel.org
To:     linux-usb@vger.kernel.org
Subject: [Bug 208891] Thunderbolt hotplug fails on HP x360 13t-aw000/86FA
 with HP Thunderbolt 3 Dock
Date:   Thu, 27 Aug 2020 20:06:40 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=208891

--- Comment #31 from Matt Turner (mattst88@gmail.com) ---
Unexpectedly, hotplug worked a few times.

I've attached dmesg and sudo lspci -vv output from two hotplug attempts with
v5.8.3, CONFIG_PCI_DEBUG=y, initcall_debug, and the patch from comment #24
applied -- one that succeeded and one that failed.

Again we see the same pattern in lspci -vv output:

--- lspci-patched-failure 2020-08-27 12:54:22.300504263 -0700
+++ lspci-patched-success 2020-08-27 12:47:04.525430133 -0700
@@ -654,9 +654,9 @@
        Latency: 0
        Interrupt: pin A routed to IRQ 167
        Bus: primary=2d, secondary=2e, subordinate=2e, sec-latency=0
-       I/O behind bridge: 00000000-00000fff [size=4K]
-       Memory behind bridge: 00000000-000fffff [size=1M]
-       Prefetchable memory behind bridge: 0000000000000000-00000000000fffff
[size=1M]
+       I/O behind bridge: 00005000-00005fff [size=4K]
+       Memory behind bridge: 68000000-680fffff [size=1M]
+       Prefetchable memory behind bridge: 0000006000000000-00000060000fffff
[size=1M]
        Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- <SERR- <PERR-
        BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
                PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-

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