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pcie_aspm_pm_state_change() was introduced at the inception of PCIe ASPM code, but it can cause some issues. For instance, when ASPM config is changed via sysfs, those changes won't persist across power state change because pcie_aspm_pm_state_change() overwrites them. Also, if the driver restores L1SS [1] after system resume, the restored state will also be overwritten by pcie_aspm_pm_state_change(). Remove pcie_aspm_pm_state_change(). If there's any hardware that really needs it to function, a quirk can be used instead. [1] https://lore.kernel.org/linux-pci/20220201123536.12962-1-vidyas@nvidia.com/ Link: https://lore.kernel.org/r/20220509073639.2048236-1-kai.heng.feng@canonical.com [bhelgaas: remove additional pcie_aspm_pm_state_change() call in pci_set_low_power_state(), added by10aa5377fc("PCI/PM: Split pci_raw_set_power_state()") and moved by7957d20145("PCI/PM: Relocate pci_set_low_power_state()")] Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.