I found that this additional patch was also needed.
Pcie_port_device_iter was added in 5.16 and referenced in the "PCI:
pciehp: Ignore Link Down/Up caused by error-induced Hot Reset" patch
commit 3134689f98f9e09004a4727370adc46e7635b4be
Author: Lukas Wunner <lu...@wunner.de>
Date: Fri Oct 15 13:58:40 2021 -0500
PCI/portdrv: Rename pm_iter() to pcie_port_device_iter()
Rename pm_iter() to pcie_port_device_iter() and make it visible outside
CONFIG_PM and portdrv_core.c so it can be used for pciehp slot reset
recovery.
[bhelgaas: split into its own patch]
Link:
https://lore.kernel.org/linux-pci/08c046b0-c9f2-3489-eeef-7e7aca435...@gmail.com/
Link:
https://lore.kernel.org/r/251f4edcc04c14f873ff1c967bc686169cd07d2d.1627638184.git.lu...@wunner.de
Signed-off-by: Lukas Wunner <lu...@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelg...@google.com>
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https://bugs.launchpad.net/bugs/1965241
Title:
Include DPC Fixes in Ubuntu 22.04 and 20.04
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