APPLIED [OEM-5.13] Re: [SRU][I/J/OEM-5.13/OEM-5.14][PATCH 0/1] Fix pci port lost when hotplug dock
Timo Aaltonen
tjaalton at ubuntu.com
Wed Jan 19 18:53:43 UTC 2022
On 13.12.2021 13.52, Aaron Ma wrote:
> BugLink: https://bugs.launchpad.net/bugs/1954646
>
> [Impact]
> On Intel Maple Ridge, when hotplug TBT4 dock, PCIe bus show error
> "severity=Uncorrected (Non-Fatal)",
> and failed to probe.
>
> [Fix]
> Re-enable PCIe port LTR after reset or hotplug, and probe it properly.
>
> [Test]
> Verified on HW with TBT4 dock. it works fine.
> Also tested Tiger Lake-LP Thunderbolt 4, tbt4 dock works fine.
> Tested on AMD Cezanne, PCIe works fine, it doesn't support thunderbolt.
>
> [Where problems could occur]
> PCI bus may break.
>
> Mingchuang Qiao (1):
> PCI: Re-enable Downstream Port LTR after reset or hotplug
>
> drivers/pci/pci.c | 25 +++++++++++++++++++++++++
> drivers/pci/pci.h | 1 +
> drivers/pci/probe.c | 18 +++++++++++++++---
> 3 files changed, 41 insertions(+), 3 deletions(-)
>
applied to oem-5.13 via rebase to impish, thanks
--
t
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