mirror of
https://github.com/torvalds/linux.git
synced 2026-01-12 00:42:35 +08:00
8a5b38c3fd
The hid-sensor-hub creates the individual device structs and transfers them to the created mfd platform-devices via the platform_data in the mfd_cell. Beforee651a1da44("HID: hid-sensor-hub: Allow parallel synchronous reads") the sensor-hub was managing access centrally, with one "completion" in the hub's data structure, which needed to be finished on removal at the latest. The mentioned commit then moved this central management to each hid sensor device, resulting on a completion in each struct hid_sensor_hub_device. The remove procedure was adapted to go through all sensor devices and finish any pending "completion". What this didn't take into account was, platform_device_add_data() that is used by mfd_add{_hotplug}_devices() does a kmemdup on the submitted platform-data. So the data the platform-device gets is a copy of the original data, meaning that the device worked on a different completion than what sensor_hub_remove() currently wants to access. To fix that, use device_for_each_child() to go through each child-device similar to how mfd_remove_devices() unregisters the devices later and with that get the live platform_data to finalize the correct completion. Fixes:e651a1da44("HID: hid-sensor-hub: Allow parallel synchronous reads") Cc: stable@vger.kernel.org Signed-off-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Benjamin Tissoires <bentiss@kernel.org> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Acked-by: Jiri Kosina <jkosina@suse.com> Link: https://lore.kernel.org/r/20241107114712.538976-2-heiko@sntech.de Signed-off-by: Lee Jones <lee@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.