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Being integrated into an USB keyboard-dock the mute LED can go away at any time, leading to the following errors: [ 918.667671] elan 0003:04F3:0755.0002: Failed to set mute led brightness: -19 [ 918.667737] leds elan:red:mute: Setting an LED's brightness failed (-19) Fix this by making the following changes: 1. Don't log an error from elan_mute_led_set_brigtness() when ret == -ENODEV 2. Set the LED_HW_PLUGGABLE flag on the mute LED led_classdev While at it also make sure that elan_mute_led_set_brigtness() returns an error (-EIO) when ret != 3 but it is not an error (>= 0). Reviewed-by: Marek Behún <kabel@kernel.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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.