diff options
| author | Niko Mauno <niko.mauno@vaisala.com> | 2024-02-13 14:45:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-17 16:38:35 +0100 |
| commit | d4718efff71dbacb935fdfafb0591b3d7ebdd14a (patch) | |
| tree | 07adf2f549763094d6bc335c0a070636be859fdb | |
| parent | a9c83252bff616cf3a38d55b7c6a6ad63667f2dd (diff) | |
usb: core: Kconfig: Improve USB authorization mode help
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@linux-m68k.org>
Closes: https://lore.kernel.org/linux-usb/CAMuHMdUy793gzDVR0jfNnx5TUdJ_2MKH5NPGSgHkytAhArtqmw@mail.gmail.com/
Signed-off-by: Niko Mauno <niko.mauno@vaisala.com>
Link: https://lore.kernel.org/r/20240213124518.20231-1-niko.mauno@vaisala.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/core/Kconfig | 22 |
1 files 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. |