This patch series adds support for delegation of GET_DESCRIPTOR requests from GadgetFS to user mode driver. This will allow deeper testing of USB hosts using GadgetFS, since it allows a user mode driver to control the responses to to GET_DESCRIPTOR requests, and respond with malformed descriptors.
Enabling this feature will break compatibility, since GadgetFS will not handle GET_DESCRIPTOR requests, although every user-mode driver so far expects it to. So we add two protection mechanisms to avoid this: - delegation will only be possible by enabling it in Kconfig, which requires enabling EXPERT as well. - even when enabled in Kconfig, delegation will be disabled until an appropriate ioctl on the control endpoint file descriptor is issued. Patch 1/3 adds support for setting/getting features via ioctls Patch 2/3 adds support for the GET_DESCRIPTOR delegation feature Patch 3/3 protects the GET_DESCRIPTOR delegation feature with Kconfig -- Binyamin Sharet, Cisco, STARE-C -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
