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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>
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@ -126,10 +126,20 @@ config USB_DEFAULT_AUTHORIZATION_MODE
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Select the default USB device authorization mode. Can be overridden
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Select the default USB device authorization mode. Can be overridden
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with usbcore.authorized_default command line or module parameter.
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with usbcore.authorized_default command line or module parameter.
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The available values have the following meanings:
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This option allows you to choose whether USB devices that are
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0 is unauthorized for all devices
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connected to the system can be used by default, or if they are
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1 is authorized for all devices (default)
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locked down.
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2 is authorized for internal devices
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If the default value is too permissive but you are unsure which mode
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With value 0 all connected USB devices with the exception of root
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to use, say 2.
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hub require user space authorization before they can be used.
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With value 1 (default) no user space authorization is required to
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use connected USB devices.
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With value 2 all connected USB devices with exception of internal
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USB devices require user space authorization before they can be
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used. Note that in this mode the differentiation between internal
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and external USB devices relies on ACPI, and on systems without
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ACPI selecting value 2 is analogous to selecting value 0.
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If unsure, keep the default value.
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