From: Niko Mauno <niko.mauno@xxxxxxxxxxx> Update the default USB device authorization mode help text so that the meaning of the option and it's available values are described more accurately. Reported-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Closes: https://lore.kernel.org/linux-usb/CAMuHMdUy793gzDVR0jfNnx5TUdJ_2MKH5NPGSgHkytAhArtqmw@xxxxxxxxxxxxxx/ Signed-off-by: Niko Mauno <niko.mauno@xxxxxxxxxxx> --- drivers/usb/core/Kconfig | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig index f337aaea7604..58e3ca7e4793 100644 --- a/drivers/usb/core/Kconfig +++ b/drivers/usb/core/Kconfig @@ -126,10 +126,20 @@ config USB_DEFAULT_AUTHORIZATION_MODE Select the default USB device authorization mode. Can be overridden with usbcore.authorized_default command line or module parameter. - The available values have the following meanings: - 0 is unauthorized for all devices - 1 is authorized for all devices (default) - 2 is authorized for internal devices + This option allows you to choose whether USB devices that are + connected to the system can be used by default, or if they are + locked down. - If the default value is too permissive but you are unsure which mode - to use, say 2. + With value 0 all connected USB devices with the exception of root + hub require user space authorization before they can be used. + + With value 1 (default) no user space authorization is required to + use connected USB devices. + + With value 2 all connected USB devices with exception of internal + USB devices require user space authorization before they can be + used. Note that in this mode the differentiation between internal + and external USB devices relies on ACPI, and on systems without + ACPI selecting value 2 is analogous to selecting value 0. + + If unsure, keep the default value. -- 2.39.2
