** Changed in: intel
Status: Fix Committed => Fix Released
** Changed in: ubuntu
Status: New => Fix Released
** Package changed: ubuntu => linux (Ubuntu)
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https://bugs.launchpad.net/bugs/1741383
Title:
[Feature] Runtime PM for native PCIe hotplug ports
Status in intel:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Bug description:
Description:
Currently we already support runtime PM for PCIe ports but it is explicitly
disabled for hotplug capable ports. There are many reasons for this:
1. It will not work well when ACPI based hotplug is used as the SMI handler
will get confused if the port is powered down.
2. For native PCIe hotplug there are problems when the slot is enabled
through sysfs like the one here:
https://bugzilla.kernel.org/show_bug.cgi?id=193951
Since we are moving from ACPI based hotplug to native PCIe hotplug in
case of Thunderbolt, it is essential to get the runtime PM for such
ports working properly. We should be able to relax the limitation a
bit and allow runtime PM for native PCIe hotplug ports once 2. above
has been resolved first.
Target Release: 19.04
Target Kernel: 4.19
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