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Commit79f960e29c("platform/x86: thinkpad_acpi: Convert platform driver to use dev_groups") introduces the use of driver.dev_groups + attribute_group.is_visible callbacks replacing the conditional calling of driver_create_file() for optional attributes. The is_visible callbacks rely on various tp_features.has_foo flags, which get set by the subdriver init functions. But before this fix, thinkpad_acpi_module_init() would call the subdriver init functions after registering the platform_device and the tpacpi_pdriver. Which would cause the is_visible callbacks to get called before the subdriver init functions, which in turn would cause optional attributes to not get registered at all, even when the feature is actually present. Fix this by moving the platform_driver_register(&tpacpi_pdriver) to after the subdriver init calls; and do the same for the tpacpi_hmon_pdriver. Fixes:79f960e29c("platform/x86: thinkpad_acpi: Convert platform driver to use dev_groups") Cc: Len Baker <len.baker@gmx.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20211123210424.266607-3-hdegoede@redhat.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.