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df5192d9bb
f3ac2ff148("PCI/ASPM: Enable all ClockPM and ASPM states for devicetree platforms") enabled Clock Power Management and L1 PM Substates, but those features depend on CLKREQ# and possibly other device-specific configuration. We don't know whether CLKREQ# is supported, so we shouldn't blindly enable Clock PM and L1 PM Substates. Enable only ASPM L0s and L1, and only when both ends of the link advertise support for them. Fixes:f3ac2ff148("PCI/ASPM: Enable all ClockPM and ASPM states for devicetree platforms") Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de> Link: https://lore.kernel.org/r/db5c95a1-cf3e-46f9-8045-a1b04908051a@xenosoft.de/ Reported-by: FUKAUMI Naoki <naoki@radxa.com> Closes: https://lore.kernel.org/r/22594781424C5C98+22cb5d61-19b1-4353-9818-3bb2b311da0b@radxa.com/ Reported-by: Herve Codina <herve.codina@bootlin.com> Link: https://lore.kernel.org/r/20251015101304.3ec03e6b@bootlin.com/ Reported-by: Diederik de Haas <diederik@cknow-tech.com> Closes: https://lore.kernel.org/r/DDJXHRIRGTW9.GYC2ULZ5WQAL@cknow-tech.com/ Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Tested-by: FUKAUMI Naoki <naoki@radxa.com> Tested-by: Diederik de Haas <diederik@cknow-tech.com> Acked-by: Dragan Simic <dsimic@manjaro.org> Link: https://patch.msgid.link/20251023180645.1304701-1-helgaas@kernel.org
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 reStructuredText 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.