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5836ebeb4a
Commitaf5376a77e("cpuidle: psci: Transition to the faux device interface") transitioned the PSCI cpuidle driver from using a platform device to the faux device framework. However, unlike platform devices, the faux device infrastructure logs an error when the probe function fails, even if the failure is intentional or expected. To prevent unnecessary error logs, we can skip creating the faux device entirely if there are no PSCI idle states defined in the device tree. Introduce a check for DT idle states during initialization and avoid setting up the device if none are found. This ensures cleaner logs and avoids misleading probe failure messages when PSCI idle support is intentionally not described in DT. Fixes:af5376a77e("cpuidle: psci: Transition to the faux device interface") Reported-by: Jon Hunter <jonathanh@nvidia.com> Closes: https://lore.kernel.org/r/cf4e70e4-9fe5-4697-8744-8c12c41b5ff9@nvidia.com Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Link: https://patch.msgid.link/20250502140119.2578909-1-sudeep.holla@arm.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.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 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.