Re: [PATCH bpf-next v2 07/28] bpf/hid: add a new attach type to change the report descriptor

On Fri, Mar 04, 2022 at 06:28:31PM +0100, Benjamin Tissoires wrote:

The report descriptor is the dictionary of the HID protocol specific
to the given device.
Changing it is a common habit in the HID world, and making that feature
accessible from eBPF allows to fix devices without having to install a
new kernel.

However, the report descriptor is supposed to be static on a device.
To be able to change it, we need to reconnect the device at the HID
level.
So whenever the report descriptor program type is attached or detached,
we call on a hook on HID to notify it that there is something to be
done.

Signed-off-by: Benjamin Tissoires <redacted>

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>